Talus Bipartitus: A Rare Anatomical Variant Presenting as an Entrapment Neuropathy of the Tibial Nerve within the Tarsal Tunnel

Abrego, Mariano Oscar; Cicco, Franco L. De; Gimenez, N. E.; Marquesini, M. O.; Sotelano, Pablo; Carrasco, Marina; Araujo, Maria Gala Santini

doi:10.1155/2018/2737982

Cited by 6 publications

(7 citation statements)

References 17 publications

(18 reference statements)

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“…After a review of the literature, few cases have previously described a skeletal abnormality as a cause of TTS. 2,3,4,5,6,16 Although one such case has described a similar bipartite talus as a cause of TTS, this case highlights how a relatively common entity in an os trigonum may seem similar to a bipartite talus and adds to the literature surrounding this rare entity, its pathological consequences, and prognosis after its removal. 6…”

Section: Discussionmentioning

confidence: 73%

“…[10][11][12] However, in smaller fragments, surgical removal without additional fixation has also been shown to have satisfactory outcomes. 6,10,12 In this case, the patient did not require additional subtalar fixation because of the small articulation with the posterior facet and subtalar stability after removal. In addition, due to its location and role in the patients TTS, fixation of the posterior talar fragment could not be pursued.…”

Section: Discussionmentioning

confidence: 88%

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Tarsal Tunnel Syndrome Associated With a Bipartite Talus

Torres,

Paulus

2024

JAAOS Glob Res Rev

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Background: Talus bipartitus is a rare skeletal anomaly that may be mistaken for an os trigonum, a relatively common accessory ossicle found posterior to the talus. Both are believed to be formed similarly with the failed fusion of the talus with a second ossification center. Os trigonum is often diagnosed incidentally or found on radiographs obtained in symptomatic patients with signs of os trigonum syndrome, which presents with posterolateral ankle pain. A bipartite talus may also present with similar symptoms but may be differentiated through its articular involvement. Case: In this article, we describe the rare presentation of tarsal tunnel syndrome in a patient caused by a bipartite talus. The patient underwent surgical decompression with the removal of the posterior fragment. Conclusion: A bipartite talus is a rare entity that may be mistaken for an os trigonum, a common accessory ossicle. In this article, we describe an outcome of a bipartite talus fragment removal due to tarsal tunnel syndrome and illustrate a rare pathological consequence of a bipartite talus. We further highlight the importance of early surgical management in patients presenting with an identifiable structure contributing to tibial nerve compression.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 88%

Tarsal Tunnel Syndrome Associated With a Bipartite Talus

Torres,

Paulus

2024

JAAOS Glob Res Rev

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“…ASM is a condition that manifests itself with the increase in clinical problems caused by advanced age (13)(14)(15)(16)(17). ASM, whose incidence was reported as 0.7%-5.5% in cadaver studies, is usually unilateral and it has been reported to be more (4,18,19). Reported that the presence of ASM causes nerve compression at a rate of 7-8% in tibial nerve compressions (13).…”

Section: Discussionmentioning

confidence: 99%

Presence of Accessory Soleus Muscle in Cadaver: Case Report

DÖNER

KELEŞ>

Karip

2023

Düzce Tıp Fakültesi Dergisi

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Human anatomy is a variable structure. There are various rare muscle-specific accessory structures. The accessory soleus muscle (ASM) is one of them and was studied in this case report. ASM was seen during routine learning and teaching dissection lessons while dissecting the right leg of a male body. When this muscle was examined, a thick beginning with fascial connections from the soleus muscle, medially in the lower 1/3 of the leg was seen. This unipennate-shaped super numeric muscle had a 3.95 cm width, 25.82 cm length, and 0.82 cm thickness. This muscle, which is seen on radiological images, may often be confused with soft tissue tumors such as ganglion, lipoma, hemangioma, synovioma, and sarcoma, and on the pathology of the muscle may cause pain and tarsal tunnel syndrome-like effects.

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“…1,5 The accessory muscles were observed by several authors in approximately 7e8% of body dissection, rarely presented as a cause of tibial nerve compression either extrinsic or intrinsic. 2,5 Conservative management should be tried first as some cases may respond well to conservative treatment. 9 Other patients may respond to botulinum toxin A injection.…”

Section: Discussionmentioning

confidence: 99%

Extrinsic compression neuropathy of the tibial nerve secondary to accessory soleus muscle in a young teenager

Badr

Hassan

Fotoh

et al. 2020

Journal of Clinical Orthopaedics and Trauma

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Compression neuropathy of the tibial nerve or one of its terminal branches (tarsal tunnel syndrome) is relatively uncommon. Accessory musculature on the posteromedial aspect of the ankle is a rare extrinsic cause of compression. Therefore, it should be considered in patients with prolonged manifestations of tibial nerve compression. A detailed history and physical examination, together with proper radiological evaluation, allow for accurate diagnosis. In this case report, a 13-year old female teenager on history, physical examination, and imaging studies was diagnosed as compression neuropathy of the tibial nerve secondary to accessory soleus muscle. After surgical excision of the accessory soleus muscle with no tarsal tunnel release, the patient presented with complete resolution of her manifestations continued free of symptoms for one and half year postoperatively. The accessory soleus muscle is a potential extrinsic cause for tibial nerve compression neuropathy.

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Talus Bipartitus: A Rare Anatomical Variant Presenting as an Entrapment Neuropathy of the Tibial Nerve within the Tarsal Tunnel

Cited by 6 publications

References 17 publications

Tarsal Tunnel Syndrome Associated With a Bipartite Talus

Tarsal Tunnel Syndrome Associated With a Bipartite Talus

Presence of Accessory Soleus Muscle in Cadaver: Case Report

Extrinsic compression neuropathy of the tibial nerve secondary to accessory soleus muscle in a young teenager

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