Giant cell fibroblastoma: a report of three cases.

Three cases of giant cell fibroblastoma are presented. All three patients were boys younger than four years of age. The neoplasms involved the subcutaneous tissue of the back, perineum, and shoulder, respectively. The tumors were characterized histologically by a mixture of spindle cells and multinucleated giant cells in a myxoid or collagenous background and by the presence of irregular, sinusoidal spaces. All three patients had local recurrence, but all were tumor-free at latest follow-up.