Painful Os Intermetatarseum: Abnormal MRI imaging findings

Accessory ossicles are a common incidental finding on imaging of the feet. Os intermetatarseum is one such ossicle. These mostly remain asymptomatic; however, pain syndromes associated with accessory ossicles are a known entity and the diagnosis of painful os syndrome should be considered in undifferentiated foot pain. Whilst use of imaging in the diagnosis of painful os syndromes of the foot is well substantiated, there is little available literature on the use of magnetic resonance imaging (MRI) in the diagnosis of painful os intermetatarseum. We report a case of painful os intermetatarseum with MRI findings that have not previously been described

Os Intermetatarseum and Polymetatarsia Without Polydactyly: A Case Report

Nontraumatic bony abnormalities of the foot occur at different rates, according to the literature. However, it is uncommon to see rare variations presenting together in one patient. This article discusses two less common anomalies: fused os intermetatarseum and polymetatarsia without polydactyly. Etiology, symptomology, diagnosis, and treatment are reviewed, in addition to the relationship of the two conditions to each other. We then discuss a case where both anomalies are present at the same time in a 17-year-old patient.

Symptomatic os intermetatarseum in a young athlete

The os intermetatarseum is located between the medial cuneiform and the base of the first and second metatarsals. Literature reviews have found few symptomatic cases of this condition since the 19th century. We report the case of a young female athlete, 20 years old, with sudden pain in the back of the midfoot after a jump. The os intermetatarseum is the rarest accessory bone in the foot and is typically asymptomatic. The presence of this bone should be considered when patients, especially young athletes, present with pain in the dorsum of the foot and compressive symptoms of the deep fibular nerve. Level of Evidence V; Therapeutic Studies; Expert Opinion.

Os Intermetatarseum May not Interfere with Metatarsus Primus Varus Deformity Correction: A Case Report

It has been believed that the correction of metatarsus primus varus (MPV) deformity of hallux valgus foot using nonosteotomy procedures would be compromised by the presence of os intermetatarseum (OI). Therefore, no soft tissue procedure has ever been reported for the correction of MPV deformity of hallux valgus foot. This is a case report of a female patient with bilateral hallux valgus deformity and also a large OI of her left foot that was corrected, satisfactorily and simultaneously, with a soft tissue technique called syndesmosis procedure, without osteotomy or OI resection. Excellent feet function was observed for 2 years until her last follow-up examination without any symptoms or signs of problems relating to the OI in her left foot. This case report demonstrated for the first time that OI may not interfere with proper MPV deformity correction because it can be preexisting and X-ray can be misleading.

Os Intermetatarseum Revisited: A Case Report of Rare Variant and Review of Literature

ABSTRACT Os intermetatarseum is the rarest accessory bone of the foot. It is usually found between 1st and the 2nd metatarsal bases arising typically from the base of the 2nd metatarsal. Only a few symptomatic cases have been reported in the literature, which were either unilateral or bilateral and radiographically they were of different shapes and sizes. We present a large, bilaterally symmetrical and unusual variant of os intermetatarseum. To our knowledge, such large, bilaterally symmetrical, fully formed os intermetatarseum, fusing to both metatarsals has not been described before. The case report also describes the surgical anatomy during the excision of os intermetatarseum and review of the literature to date. How to cite this article Rachha R, Gorva A. Os Intermetatarseum revisited: A Case Report of Rare Variant and Review of Literature. J Foot Ankle Surg (Asia-Pacific) 2015;2(1): 47-50.