Summary
Unicameral bone cyst is a benign lesion of uncertain origin.
Complete Information on this Tumor
Unicameral bone cyst is a benign lesion of uncertain origin. Several etiologies have been proposed, including expansion of synovial tissue trapped in the bone during development, local failure of ossification, or obstruction of the venous outflow of the bone. In the foot, UBC occurs almost exclusively in the calcaneus. The location and appearance is characteristic and biopsy may not be needed to confirm the diagnosis. The location is very specific. The lesion is in the lateral portion of the calcaneus sub-adjacent to the middle facet. The apex of the lesion is towards the forefoot. The margin of the lesion is sharply defined, sometimes with a sclerotic rim. There is no matrix mineralization or periosteal reaction.
It presents as an incidental finding or with mild aching pain during sports or running.