PMC3262540_01
Large mass on the dorsal surface of the right foot of a 60 year-old woman.
DERMATOLOGY2011-704549.001.jpg
PMC3262540_01_DERMATOLOGY2011-704549.001.jpg
fig1
Physical examination revealed a 4.5 x 4.5 cm, hard, painless, immobile mass; it was well defined, round with ulceration at the end (Figure 1(a)). Radiographs of the right foot revealed a calcifying soft tissue mass without bone involvement (Figure 1(b)). A lesion biopsy was performed and histological exam showed nodular deposits of calcification with chondroid differentiation, each surrounded by a palisade of rounded, chondrocyte-like cells, between the coalescent calcified nodules and emanating into the surrounding soft tissues without pleomorphism, atypia, or mitotic activity, the stroma of nodules was hyalinised (Figure 1(c)).