Aggressive giant cell tumor of the anterior arc of the rib.

Giant cell tumor of bone also known as osteoclastoma is a distinct clinical, roentgenographic and pathologic entity with specific characteristics. It is a benign but locally aggressive neoplasm, classically seen as a purely lytic lesion of the epiphyseal or metaphyseal-epiphyseal region of long tubular bones extending to the articular surface. It usually occurs after skeletal maturation and is one of the rare bone tumors that more frequently affects women. Even though rarely it can occur in ribs, it usually occurs in the posterior aspect. We report here a case of giant cell tumor originating from the anterior arc of the rib diagnosed on fine needle aspiration cytology.

Metastatic or metachronous adamantinoma: An Enigma.

Adamantinoma is an uncommon tumour of low grade malignancy in terms of biologic aggressiveness; metastasis occurring many years after amputation. A young male underwent an above knee amputation of left leg for adamantinoma of tibia. He returned with pain and swelling in his right thigh five years later. Investigations revealed an adamantinoma in the diaphysis of the right femur. The unusual presentation of this adamantinoma at an uncommon site threw up interesting insights into the nature of this lesion. In particular, the metachronous origin of the adamantinoma in the femur is discussed in this report.