Talus bipartitus is an exceptional congenital malformation consisting in the presence of two non-fused bony talar fragments. We report the case of an adolescent girl who complained of mechanical pain in the left ankle which became increasingly invalidating. Plain radiographs, CT-scan and MRI led to the diagnosis of this congenital anomaly: talus bipartitus. Surgical correction by subtalar arthrodesis provided improvement at the cost of reduced ankle mobility. Surgical treatment should be proposed for talus bipartitus in patients with invalidating pain or stiffness when rehabilitation fails to provide sufficient improvement.
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Tarsal Tunnel Syndrome Associated With a Bipartite Talus.
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From the Renaissance School of Medicine, Stony Brook University, Stony Brook, NY (Torres), and the Department of Orthopaedic Surgery, Stony Brook School of Medicine, Stony Brook, NY (Dr. Paulus).
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.
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Trauma and Orthopaedics Institute "Carlos Ottolenghi", Italian Hospital of Buenos Aires, Peron 4190, C11000ABD CABA, Argentina.
Tarsal tunnel syndrome is an entrapment neuropathy of the tibial nerve within the tarsal tunnel that lies beneath the retinaculum on the medial side of the ankle. It is often underdiagnosed. Talus bipartitus is a rare anatomical variant; only a few cases have been described in medical literature.
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Department of Orthopaedic Surgery, Academic Medical Center, University of Amsterdam, PO Box 22660, 1100 DD, Amsterdam, The Netherlands.
Purpose: The aim of this study was to provide a literature review on talus bipartitus and to introduce an arthroscopic treatment option.
Methods: A systematic review of published case reports and small case series was performed. Medline, Embase, CINAHL, Google Scholar and Web of Science databases were searched for relevant publications.
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Department of Traumatology and Orthopaedics, Centre of Postgraduate Medical Education, Prof. Adam Gruca Clinical Hospital, Otwock, Poland.
Unlabelled: Talus bipartitus is a rare skeletal variation. Several causative factors have been proposed, but none of them seem to be convincing. We hypothesize that talus bipartitus may result from ossification disruption in neonatal period caused possibly by an infection.
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