Fibro-Osseous Pseudotumor Arising From Nail Bed of the Great Toe: A Rare Case of Recurrence.

A fibro-osseous pseudotumor (FOPT) is a rare, rapidly enlarging, benign soft-tissue neoplasm that presents with localized pain, swelling, and redness. It typically presents in the hands and much less frequently in the feet. FOPT is characterized histologically by foci of osseous differentiation within the proliferated fibroblasts. This must be differentiated from other benign and malignant lesions. FOPT of the toes has been described in a few reports, but recurrence, following surgical excision, is extremely rare. Here we report a young, healthy female patient who presented with a rapidly growing FOPT of the left great toe. This unusual case had recurred twice following surgical excision, all within a 2-month period of time. The lesion was again completely excised, with no recurrences at follow-ups of 18 and 36 months. In conclusion, FOPT is a rare soft tissue lesion of the toes. It features fibroblastic proliferation and osseous differentiation, which needs to be differentiated from other benign and malignant tumors. The standard treatment is complete surgical excision with an excellent prognosis.