FIBROSARCOMA OF THE TOE - A DESTRUCTIVE LESION OF THE DISTAL PHALANX

A rare case of well differentiated fibrosarcoma occurring in the left second toe is described in a 12-year-old boy who presented with a dest ructive lesion that had almost totally destroyed the distal phalanx, e xcept for the epiphysis, Amputated specimens showed microscopic eviden ce of proliferation of uniform spindle cells arranged in both fascicle s and a characteristic herringbone pattern with a small number of mito tic figures, This tumor did not show any specific immunoreactivity exc ept for vimentin and had basic ultrastructural characteristics of fibr oblasts and myofibroblasts, The tumor was treated by amputation at the middle phalanx level and had not recurred 3 years later From the pres enting radiographic features, some benign neoplasms and reactive lesio ns were considered in the differential diagnosis, Only results from th e pathologic examination were useful in reaching a correct diagnosis.