Secondary malignant transformation of giant cell tumor of the first metatarsal presenting as a fungating cauliflower like mass- A rare case report

Abstract

Giant cell tumor (GCT) is the most commonly occurring benign bone tumor. It occurs more commonly in the third decade of life and is slightly more common in females. The knee joint i.e. the distal femur as well as proximal tibia account for most number cases followed by the distal end of radius. The occurrence in foot is rare and usually occurs in the younger age group. The progression in foot is usually accelerated and is masked by vague symptoms and boring type of foot pain. Malignant transformation is rare. In our case the 38 years female patient had GCT of the first metatarsal which later progressed to a secondary malignancy involving the ipsilateral inguinal and femoral lymph nodes. This was later managed by performing a Syme’s amputation along with the involved lymph node dissection. In our single case we noted these salient features of GCT which has a high rate of recurrence, is locally aggressive and has potential for malignant transformation.