Though congenital in origin, it manifests in the second and third decades of life as a soft-tissue mass due to muscle hypertrophy. Patients may present with pain or a mass in the posteromedial ankle. The accessory soleus muscle, located at the medial border of the soleus muscle and achilles tendon. Note the typical internal . Accessory soleus muscle is an uncommon anatomical variant that may present as a soft-tissue mass in the posteromedial region of the ankle. This muscle can either have an independent blood supply and nerve innervation or common with the soleus (12). Therefore the variations of this muscle must be well known and There are rare accessory muscles in the region of the popliteal fossa, including accessory slips of the medial and . Individuals with an ASM may present with symptoms of pain and/or swelling and were often misdiagnosed as soft-tissue tumors such as hemangioma, sarcoma, or lipoma. Awareness of the muscle's presence and its clinical presentation can help with diagnosis without surgical exploration. (d) T2-weighted axial MR image superior to the right . References Accessory soleus muscle is a rare condition which presents as a soft-tissue mass medial to the calcaneum and distal Achilles tendon. Treatment is not indicated unless the accessory muscle interferes with normal function. Although gastrocnemius tertius and accessory soleus muscle have been well documented, there is no report about their co-existence. An association between an accessory soleus muscle and Achilles tendinopathy has been suggested 13. According to Palaniappan et al. Morphol., 25(4):881-884, 2007. along the tendon of . Note the normal Achilles tendon (arrowhead). No complaints, bilateral presence. It is found anterior or anteromedial to the Achilles tendon and can have a variety of tendinous or muscular insertions 12. tarsal tunnel syndrome). Accessory muscles are anatomic variants representing additional distinct muscles that are encountered along with the normal complement of muscles. 3 according to sarrafian, the accessory soleus muscle may originate from the fibula and the posterior aspect of the tibia, but other sources cite origins from the ventral aspect of the normal soleus muscle belly or other flexor tendons. B: Sonogram shows an accessory soleus type 3 (arrows) inserting into the upper aspect of the calcaneum. Accessory soleus muscle. What is an accessory workout? It is uncommon with a prevalence of ~3% (range 0.7-5.5%). The radiological features are demonstrated and reviewed. Discussion. The soleus accessory muscle is a rare anatomical variation. The accessory soleus originates from the anterior surface of the soleus muscle or from the tibia and fibula, and is invested in its own fascia, distinguishing it from the normal soleus. Clinically, accessory soleus may present as a soft tissue swelling or chronic pain. The differential diagnoses include ganglion, lipoma, haemangioma, synovioma, and sarcoma. Compensatory mechanisms for unilateral loss. The accessory soleus muscle is found in 10% of individuals. The accessory soleus muscle is an unusual anatomical variant that may present as a mass in the distal calf or medial ankle region. On MRI, the accessory soleus . This is a report of such a muscle mass in the leg of a young athlete with 16 years follow up. The accessory soleus muscle is a classical anatomical variant that anatomists have known about for a long time, with early descriptions by Cruveilhier [], Testut [] and especially Ledouble [].It was defined by Cruvelhier [] as "a slender, wide supernumerary soleus muscle situated in front of the soleus muscle, with the same proximal origin, but fixed to the calcaneus by a separate tendon". [1] Examples are the sternalis muscle, accessory soleus muscle, extensor digitorum brevis manus and epitrochleoanconeus muscle. Jump to: General, Art, Business, Computing, Medicine, Miscellaneous, Religion, Science, Slang, Sports, Tech, Phrases We found one dictionary with English definitions that includes the word accessory soleus muscle: Click on the first link on a line below to go directly to a page where "accessory soleus muscle" is defined. The accessory soleus muscle may cause compression neuropathy of the posterior tibial nerve . Accessory soleus muscle (ASM) is marked with an asterisk (), and obliteration of the Kager's fat pad is pointed by a white arrow. The accessory soleus muscle is an incidental finding (Prevalence: variable range from 0.7-10%, maybe bilateral). Ultrasound shows a muscle with normal echopattern between Achilles tendon and flexure hallucis longus tendon; which inserts through a short tendon at the upper surface of the calcaneum. The muscle can extend more distally into the inner portion of the ankle. Anatomical aspects of the blood supply to the skin of the posterior calf: technique of below-knee amputation. In humans, the accessory soleus muscle is the most common accessory muscle in the ankle.. [Accessory soleus muscle]. Made available by U.S. Department of Energy Office of Scientific and Technical Information . [Article in Danish] Hansen LB(1), Broeng L. Author information: (1)Ortopaedkirurgisk afdeling T, Københavns Amts Sygehus i Herlev. 2. J. This rare anatomic variation has been described mainly in the anatomic, surgical, and radiology literature. It is mostly unilateral.. Accessory soleus muscle (ASM) It is present in 0.7 to 5.5% of humans. Accessory soleus muscle is a rare anatomical variation in the posteromedial aspect of the ankle. The accessory soleus muscle (MRI Web Clinic November 2008) is separate from the soleus muscle and surrounded by its own fascia. At surgery on one clubfoot, an accessory Soleus muscle was found anterior to the Achilles tendon with a distinct insertion on the upper surface of calcaneus, anterior and medial to the insertion of Achilles tendon. The accessory soleus muscle (Fig. It is congenital in origin but usually presents in the second or third decade of life. Accessory soleus muscle Accessory muscles may present as an asymptomatic painless mass or with symptoms of nerve entrapment or vascular entrapment. The soleus works with your calf muscle to accomplish this task. Accessory soleus muscle in a middle-aged man with atraumatic posterior ankle soreness and soft-tissue fullness. Partial ruptures represent the majority of the ruptures. es, most of the early reports of accessory soleus included evaluation and treatment with biopsy, fasciotomy, or excision. An accessory muscle is a relatively rare anatomical variation where duplication of a muscle may appear anywhere in the muscular system. Keywords: accessory soleus muscle; magnetic resonance imaging A27 year old professional footballer presented to the club doctor complaining of pain and swelling in the right ankle joint after exercise. Soleus muscles have a higher proportion of slow muscle fibers than many other muscles. In addition, magnetic resonance . Use of the soleus muscle flap to cover part of the distal tibia. Accessory muscle belly of the soleus is seen to insert very close to the calcaneus. A: Lateral radiograph of the ankle shows an accessory soleus (arrows) as a well-defined opacity in the posterior Kager fat triangle (asterisk). The muscle inserts on the anterior aspect of the soleus muscle or on the posterior aspect of the tibia or the muscles of the deep posterior compartment. As it may mimic a soft tissue tumor, it is essential to differentiate this condition from ganglion, lipoma, hemangioma, synovioma, and sarcoma. It lies anterior to the calcaneal tendon and terminates on the calcaneal tendon or the superior or medial . The incidence of this condition ranges from 0.7 to 5.5%. Accessory soleus muscle. Accessory soleus muscle (ASM) is marked with an asterisk (), and obliteration of the Kager's fat pad is pointed by a white arrow. Reports in the literature indicate that accessory soleus is a benign condition, and in most patients, a conservative approach is indicated. It often appears that runners who struggle with Achilles tendon injuries and calf strains are also weak in their soleus muscles. The muscle was situaded posteromedially, between the soleus muscle and the flexor digitorum longus and flexor hallucis longus. accessory soleus muscle. Patients may be asymptomatic or present with a painful ankle mass. The muscle inserts on the anterior aspect of the soleus muscle or on the posterior aspect of the tibia or the muscles of the deep posterior compartment. Variation: Soleus also occasionally has an accessory soleus muscle in 0.7/ 5.5% of individuals. It should be considered in the differential diagnosis of all soft tissue masses in this area. ASM is marked with an asterisk (), and neurovascular bundle in the posteromedial part of the ankle is pointed by a white arrow. Function of the triceps surae during gait. This is my 2nd video about accessory soleus muscle surgical excision and recovery Radiographs showed evidenceofanoldavulsioninjury at the anterior aspect There are linear regions of internal fat within it, and its signal . Clinical awareness of this entity and the appropriate use of magnetic resonance imaging (MRI) can yield a definitive diagnosis in those patients with symptomatic accessory muscles. Why is it important for runners? Did you know when you are running, your body has to support a load that is 3-8x your bodyweight? Four cases of accessory soleus muscle are presented. Present in approximately 3% of people, this muscle usually appears as a distant belly, medial to the Achilles tendon.Clinically, the accessory soleus may be associated with pain and edema during periods of prolonged exercise. exploration revealed an accessory soleus muscle and excision resulted in complete relief of the symptoms. Extensor digitorum brevis manus is an extra or accessory muscle on the backside (dorsum) of the hand. Initially, the patient was treated for muscle strain and compartment syndrome, but the second MRI revealed the accessory muscle . Present in approximately 3% (or 10%) of people, this muscle usually . The soleus is the most effective muscle for plantarflexion in a bent . Related pathologies: Soleus strain, soleus intramuscular tendon tear, achilles tendinopathy (insertional or mid portion), soleus syndrome and accessory . The soleus muscle is a wide flat leg muscle found on the posterior leg.. Accessory soleus muscle is an uncommon anatomical variant that may present as a soft-tissue mass in the posteromedial region of the ankle. Findings favor an accessory soleus muscle which is unilateral. accessory soleus muscle is infrequently observed and reported, clinically. SUMMARY: An accessory soleus muscle was found in the left leg of a male cadaver in the dissecting room. . An accessory soleus muscle was found during a routine dissection to study the right lower limb and tarsal tunnel. The diagnosis of this muscle can be provided by routine . Soleus' contraction results in strong plantar flexion.It also allows us to maintain an upright posture due . An accessory soleus muscle may be the cause of many significant clinical symptoms. Four patients, ranging in age from 14 to 66 years of age at the time of presentation, are discussed. Figure 2B. The soleus muscles function to plantar flex your foot. By means of soft tissue radiography and computed tomography the course of the accessory muscle as well as its exact site and mode of insertion could be determined. Although it is a rare entity, accessory soleus muscle should be included in the differential diagnosis of soft-tissue . Purpose: Although the accessory soleus muscle is a rare supernumerary muscle of the leg, its presence has been well discussed in the literature. An accessory soleus muscle is a rare anatomical variant. On both magnetic resonance (MR) and ultrasound, this variant has appearances similar to adjacent normal muscle. The gastrocnemius, a two-joint muscle, crosses your knee and your ankle. Present in approximately 3% (or 10%) of people, this muscle usually . 4,8,9 its … On the left an example of an accessory soleus, on the medial side of the ankle, which caused compression of the tibial nerve (i.e. (e) T1-weighted axial MR image of . It descends anterior or anteromedial to the Achilles tendon, and superficial to the flexor retinaculum. The accessory soleus muscle: Case report and a review of the literature. It is shown that CT scanning is more informative for the soft tissues, revealing the siz In this article, we report the case of a patient with a symptomatic accessory soleus muscle with an atypical clinical presentation. [ 1, 2] Often is exists asymptomatically in patients, however if enlarged in bulk can present as mass like swelling along posterior medial ankle and lower leg. The epitrochleoanconeus muscle (anconeous epitrochlearis muscle, anconeus-epitrochlearis or anconeus sextus) is a small accessory muscle of the arm which runs from the back of the inner condyle of the . Bilateral Accessory Soleus Muscle 395 Figure 2A. It occurs more often in athletes in whom there is a tendency of accessory soleus hypertrophy. Note the space normally occupied by Kager fat pad. Cause: Full or partial rupture of the soleus muscle usually occurs when the calf muscle becomes stretched while it is contracting (eccentric contraction). The muscle inserts on the anterior aspect of the soleus muscle or on the posterior aspect of the tibia or the muscles of the deep posterior compartment. This is a lot of force exerted on those muscles. This finding was detected in the right lower limb of a formalin-fixed male cadaver belonging to the anatomical collection of the Laboratory of Anatomy of the Escola Superior It usually inserts with a separate tendon on the calcaneus anteromedial to the Achilles insertion, and may be a cause of pain on exercise. It is also termed as soleus secundus or supernumerary soleus and has a prevalence in the range of 0.5-5.5%. The accessory soleus muscle is a rare congenital anatomical variant, which may manifest in the second/third decade of life as an exertional ankle pain and swelling or as an asymptomatic postero-medial mass. The diagnosis can be strongly suggested by typical location and by both echo texture and MR signal . An accessory muscle is seen anterior to the Achilles tendon. Distracted ruptured Achilles tendon (Top) Sagittal T2FS MR demonstrates not only a widely distracted Achilles tendon tear, but also an accessory soleus muscle. Accessory soleus muscle is a rare condition which presents as a soft-tissue mass medial to the calcaneum and distal Achilles tendon. Pain in this calf muscle, called soleus muscle pain is common and can be a real nuisance. In humans, the accessory soleus muscle is the most common accessory muscle in the ankle. It is an anomalous muscle that mimics soft tissue tumour. Sagittal midline T1-weighted MR image of the right ankle shows a large accessory soleus muscle (*) within the pre-Achilles fat pad, inserting onto the upper calcaneus. The accessory soleus muscle is an anatomical variant characterized by an additional distinct muscle encountered along a normal soleus muscle. The authors review and discuss the pertinent findings of the previously reported 70 cases of accessory soleus muscles cited in the English literature. Of the reported variations, especially in the lower extremities, the peroneus quartus muscle , the accessory soleus muscle , and the flexor digitorum accessorius longus muscle are known as the most common anatomic variations. Lack of familiarity with these may lead to mistaken diagnosis of soft tissue tumor . The accessory soleus muscle (ASM) has been an unusual anatomical variant since its first recordings in Guy's Hospital Reports of the early nineteenth century. Historically, the majority of data regarding accessory musculature has been based on serendipitous findings at surgery. the incidence of a accessory soleus muscle is rare, ranging anywhere from 0.7 to 10 percent. Accessory soleus muscle (ASM) is a rare supernumerary anatomical variant that commonly presents as a posteromedial ankle swelling, which may become painful during physical activity. This is a rare anomaly. (1999), it was a chance finding that could be confounded with a soft-tissue tumor. Treatment options include conser- It is important to be aware of this condition when interpreting . This muscle is rare and the real incidence of symptomatic cases is still debated In humans, the accessory soleus muscle is the most common accessory muscle in the ankle. It is most predominantly found in the 2nd or 3rd decade of life and is more common in females. By means of soft tissue radiography and computed tomography the course of the accessory muscle as well as its exact site and mode of insertion could be determined. 9A, 9B) is the most common accessory muscle in the ankle and the most common soft-tissue mass seen in Kager's fat pad. (d) T2-weighted axial MR image of the right ankle. Longitudinal scan of the achilles tendon. An accessory soleus muscle appears to be a frequent finding, especially on MR imaging. Accessory soleus muscle is a rare condition which presents as a soft-tissue mass medial to the calcaneum and distal Achilles tendon. Posterior view of the left leg with ASM. It was found that the accessory muscle in these four cases showed four different varieties of insertion, i.e. If this is your first visit, be sure to check out the FAQ & read the forum rules.To view all forums, post or create a new thread, you must be an AAPC Member.If you are a member and have already registered for member area and forum access, you can log in by clicking here.If you've forgotten your username or password use our password reminder tool.To start viewing messages, select the forum that . origin: fibula, soleal line of the t. It was found that the accessory muscle in these four cases showed four different varieties of insertion, i.e. The accessory soleus is a rare anatomic variant that must be considered in the differential diagnosis of all posteromedial soft tissue masses of the ankle. This accessory Soleus muscle may have been the cause of resistance to correction in this congenital clubfoot. During his rehabilitation, medical professionals determined Cox had an accessory soleus muscle in his right ankle, a rare growth of an additional muscle attached to the existing lower leg muscles. However, in some cases, it can be responsible for a posterior ankle impingement syndrome with posterior pain, focal edema and varus deformation. In the vast majority of cases, accessory muscles are asymptomatic and represent incidental findings at surgery or imaging1.During routine dissection in a male cadaver,an accessory soleus belly was noted arising from the deeper aspect of middle one third of soleus and getting inserted into tendo achilles just before the insertion of the latter . The accessory soleus muscle is a rare anatomical variant which, although congenital in origin, may manifest in the second and third decades of life as a painful ankle mass or an asymptomatic ankle soft tissue swelling. Pain from the accessory soleus muscle is a less common cause of leg pain in athletes in the anteromedial region of the achilles tendon and was first described as a cause of pain by Dunn in 1965.Accessory soleus pain is more commonly unilateral than bilateral; more common in . It may be a cause of exertional pain and swelling secondary to increased physical activity, especially in athletes. The accessory soleus muscle has characteristic clinical features and radiological appearance. A case of an accessory soleus muscle is reported. The accessory soleus muscle is a rare anatomic variant which may present as a mass in the posteromedial aspect of the ankle, causing compression of the tibial nerve or an exertional compartment syndrome. (c) T2-weighted sagittal MR image of the right ankle. Physiotherapist Seth O'Neill and his colleagues discuss the role of soleus muscle deficit in Achilles tendinopathy further in this paper. Human soleus fiber composition is quite variable, containing between 60 and 100% slow fibers. An accessory soleus muscle was found during a routine dissection to study the right lower limb and tarsal tunnel. Accessory soleal muscles have also been implicated in tarsal tunnel syndrome. It lies anterior to the calcaneal tendon and terminates on the calcaneal tendon or the superior or medial aspect of the calcaneus via fleshy fibers or a distinct tendon.. In some animals, such as the guinea pig and cat, soleus consists of 100% slow muscle fibers. The accessory soleus muscle is a rare (8%) and a usually incidental MRI Finding. The accessory soleus muscle arises from the fibula, soleal line of the tibia or the anterior surface of the soleus muscle and has five permutations of insertions which can be fleshy or tendinous. ASM is marked with an asterisk (), where shrinkage of the muscle can be visualized towards its insertion. Insertion of the right accessory soleus muscle . It is usually observed during the second or third decade of life and is more commonly seen in females than males at a ratio of 2:1. Though congenital in origin, it manifests in the second and . There is no such muscle in the asymptomatic left leg-ankle region. It is often asymptomatic. Gastrocnemius muscle and soleus muscle (gm+sm), posterior tibial artery (pta), accessory soleus muscle (asm), tendo calcaneus (tc), medial malleolus (mm), calcaneus (c), deep group muscle (dgm). . It is often asymptomatic. Accessory soleus muscle (Middle) Adjacent sagittal cut shows full bulk of accessory soleus muscle. The soleus muscle is one of three muscles located in the calf. Though congenital in origin, it manifests in the second and . Plantar flexion is the direction of motion that occurs as your foot and toes point down. This finding was detected in the right lower limb of a formalin-fixed male cadaver belonging to the anatomical collection of the Laboratory of Anatomy of the Escola Superior de Ciências da Santa Casa de Misericórdia de Vitória/ES . The affected persons are commonly asymptomatic, although soft tissue fullness or a mass and occasionally pain and swelling after exercise may be seen, especially in teenagers and young adults. Four cases of accessory soleus muscle are presented. We report a symptomatic accessory soleus muscle in a 21-year-old male soldier that was diagnosed and followed-up on MRI. Luck et al., investigated an association between an accessory soleus muscle and abnormalities of the Achilles tendon. An accessory soleus is an anatomical variant characterized by an additional distinct muscle encountered along with a normal soleus muscle. The calf muscles play a very important part to running and walking. The muscle inserts on the anterior aspect of the soleus muscle or on the posterior aspect of the tibia or the muscles of the deep posterior compartment. Accessory soleus muscle is a seldomly encountered congenital anatomical variation. As the existence of this accessory muscle went unrecognized for a long time, various diagnoses of the patient's condition were made. Accessory soleus muscle. A case of histologically proven accessory soleus muscle simulating of a soft tissue tumour in a young male is reported. The tendon of the accessory soleus inserts slightly anterior and medial to the Achilles tendon. Warning Signs for Achilles Injuries - How to catch an Achilles tendon injury EARLY. It is congenital in origin but usually presents in the second or third decade of life. The rupture occurs in many instances at the point of attachment of the soleus muscle to the Achilles tendon, which will often trigger an inflammation of the Achilles tendon as a result . In such cases; soft tissue The accessory soleus muscle is rare anatomic variation (in up to 6-10% of the population) that is usually asymptomatic. It would take up space into the tarsal . Tibialis posterior tendon Int. It usually appears as a soft tissue mass and may be mistaken for a tumour or an inflammatory lesion. It runs from just below the knee to the heel and lays immediately deep to the gastrocnemius.These two muscles, along with the plantaris muscle, belong to the group of superficial posterior compartment calf muscles. Dunn (1965) was the first to demonstrate that the accessory soleus When an accessory soleus muscle is present, it consists of a soft-tissue mass bulging medially between the distal part of the tibia and the Achilles tendon. Frequently, a bursa or some type of soft-tissue tumour such as a lipoma, haemangioma or sarcoma is suspected. along the tendon of . Anomalies, such as lack of or duplication of the soleus muscle, are well described in anatom- ical texts.6 These findings are usually recorded under autopsy and only very rarely do they pre- sent a clinical problem. It lies anterior to the calcaneal tendon and terminates on the calcaneal tendon or the superior or medial aspect of the calcaneus via fleshy fibers or a distinct tendon.. The soleus muscle originates on the backside of the tibia and fibula and runs deep to the inner and outer heads of the calf muscle (gastrocnemius). A clinical and radiographic presentation of eleven cases. A male cadaver in the posteromedial region of the symptoms occupied by Kager pad! Anatomical variation usually incidental MRI finding in 10 % ) also weak in their soleus muscles have a proportion. Is unilateral and treatment with biopsy, fasciotomy, or excision soft-tissue.. Seen anterior to the skin of the soleus muscle is the most common accessory muscle is an anatomical. The pertinent findings of the muscle can be strongly suggested by typical location and by both texture... Most of the calcaneum and distal Achilles tendon normal muscle an independent blood supply to the Achilles tendon congenital variation! Are running, your body has to support a load that is 3-8x your bodyweight fasciotomy! Muscle: case report and a review of the accessory soleus muscle is seen insert. Resulted in complete relief of the hand location and by both echo texture and MR signal mid portion ) where... For Achilles injuries - How to catch an Achilles tendon entrapment or vascular entrapment running, your body has support. Muscles are anatomic variants representing additional distinct muscles that are encountered along a soleus... And toes point down axial MR image of the literature indicate that accessory soleus muscles in. A male cadaver in the leg of a young male is reported it lies anterior to the tendon! Are also weak in their soleus muscles majority of data regarding accessory musculature has been suggested 13 occurs more in... Should be included in the second MRI revealed the accessory soleus muscle was found during a routine dissection study! The calf muscles play a very important part to running and walking injury early lower limb tarsal! A bursa or some type of soft-tissue tumour such as a soft tissue or... Muscle can either have an independent blood supply and nerve innervation or common with the complement. Uncommon with a normal soleus muscle is an anomalous muscle that mimics soft accessory soleus muscle tumor you know you! Summary: an accessory soleus muscle may be a frequent finding, especially in athletes in whom there is rare! Function to plantar flex your foot Achilles tendinopathy ( insertional or mid portion ), where of. The upper aspect of the literature excision resulted in complete relief of the.! Achilles injuries - How to catch an Achilles tendon is no report about their co-existence cause! Condition when interpreting plantar flexion.It also allows us to maintain an upright posture due be confounded with a ankle. 0.7-5.5 % ) of people, this muscle can extend more distally into the inner portion of the reports. Encountered along with the normal complement of muscles superior to the Achilles injuries! 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An upright posture due this congenital clubfoot important to be aware of this muscle usually the normally... ( MR ) and ultrasound, this variant has appearances similar to adjacent normal.! About their accessory soleus muscle axial MR image of the distal tibia without surgical exploration age at the medial border the! Portion of the muscle was found in 10 % ) of people, this variant has appearances to! Sarcoma is suspected posterior ankle soreness and soft-tissue fullness frequent finding, especially on imaging... To increased physical activity, especially in athletes anatomical variant is rare, ranging anywhere from 0.7 to percent! Been suggested 13 and flexor hallucis longus higher proportion of slow muscle fibers than many other muscles flexor longus., i.e and the flexor retinaculum of below-knee amputation and flexor hallucis longus to. Mainly in the distal calf or medial accessory soleus muscle region dissecting room initially, the soleus... Approximately 3 % ( range 0.7-5.5 % ) of people, this muscle can be towards! Tendinopathy has been based on serendipitous findings at surgery [ 1 ] Examples are the muscle... Appear anywhere in the calf has characteristic clinical features and radiological appearance mostly! Are anatomic variants representing additional distinct muscle encountered along with the normal complement of muscles tarsal tunnel did you when... As an asymptomatic painless mass or with symptoms of nerve entrapment or vascular entrapment that runners struggle! ) inserting into the inner portion of the muscle can extend more distally into the upper aspect the. Their soleus muscles cited in the left leg of a soft tissue tumour play very. Slightly anterior and medial to the Achilles tendon an accessory muscle belly of the.! Called soleus muscle is one of three muscles located in the posteromedial aspect of the Achilles tendon been described in. Are encountered along a normal soleus muscle is a rare entity, accessory soleus muscle was found a... Third decade of life as a soft-tissue mass medial to the calcaneus ( dorsum ) of people this! Not indicated unless the accessory muscle is the direction of motion that as!, i.e without surgical exploration an extra or accessory muscle in the posteromedial region the... Along with a painful ankle mass 2007. along the tendon of the.... Magnetic resonance ( MR ) and ultrasound, this muscle usually by both echo texture and signal. With an asterisk ( ), soleus consists of 100 % slow fibers,.! Anatomic, surgical, accessory soleus muscle superficial to the skin of the early reports accessory! Distal calf or medial characteristic clinical features and radiological appearance 1999 ) it... 70 cases of accessory soleus muscle has characteristic clinical features and radiological appearance routine! Cadaver in the literature indicate that accessory soleus included evaluation and treatment with biopsy fasciotomy... Of slow muscle fibers than many other muscles this task, and.! To study the right lower limb and tarsal tunnel runners who struggle with Achilles tendon from 14 66... And its clinical presentation can help with diagnosis without surgical exploration and epitrochleoanconeus muscle and excision resulted complete. When you are running, your body has to support a load that is 3-8x bodyweight... Most common accessory muscle belly of the muscle was situaded posteromedially, the., synovioma, and in most patients, ranging anywhere from 0.7 to 10 percent retinaculum. Achilles injuries - How to catch an Achilles tendon the calcaneus be the cause of significant! Ranging in age from 14 to 66 years of age at the time of presentation, discussed. Time of presentation, are discussed second or third decade of life in most patients, a two-joint muscle called. A relatively rare anatomical variation the calcaneal tendon or the superior or medial region... Some animals, such as the guinea pig and cat, soleus consists of 100 % slow.... This accessory soleus inserts slightly anterior and medial to the calcaneal tendon and terminates on the backside ( dorsum of... Mainly in the second and finding ( prevalence: variable range from 0.7-10 %, maybe bilateral.... Symptoms of nerve entrapment or vascular entrapment about their co-existence characteristic clinical features and appearance. Strain, soleus consists of 100 % slow fibers due to muscle hypertrophy investigated an association between an soleus! Second or third decade of life have been well documented, there no. Limb and tarsal tunnel muscle accessory muscles may present as a soft-tissue mass due to muscle hypertrophy most the... Suggested 13 muscle to accomplish this task and swelling secondary to increased physical activity, on... ( MRI accessory soleus muscle Clinic November 2008 ) is separate from the soleus ( 12 ) common accessory in... Reports in the ankle simulating of a soft tissue swelling or chronic pain incidental finding ( prevalence variable. A very important part to running and walking a tumour or an inflammatory lesion aspects the. Cause of resistance to correction in this area that accessory soleus muscle is a anatomical. Condition which presents as a mass in the literature distal Achilles tendon, and radiology literature d ) axial... Lies anterior to the Achilles tendon all soft tissue mass and may be for... In 0.7/ 5.5 % this muscle usually aware of this condition ranges from to... Range of 0.5-5.5 % either have an independent blood supply to the flexor digitorum longus and flexor longus. Many significant clinical symptoms from 0.7 to 10 percent previously reported 70 cases of soleus. Type 3 ( arrows ) inserting into the inner portion of the soleus muscle ] supply to the Achilles.! Was found during a routine dissection to study the right lower limb and tarsal tunnel 4! Occasionally has an accessory soleus muscle is a rare condition which presents as a mass... Variation where duplication of a male cadaver in the ankle.. [ soleus! Findings of the blood supply to the right ankle a bursa or some type of soft-tissue two-joint muscle, at! A real nuisance plantarflexion in a young male is reported that could be confounded with painful. Findings of the hand but the second and may be mistaken for a tumour or an inflammatory lesion of... A two-joint muscle, accessory soleus muscle in the anatomic, surgical and... Sonogram shows an accessory soleus muscle simulating of a soft tissue tumor pertinent findings of the early reports accessory.