A 37 year old female has a contracture involving the third digit of her left hand that prevents her from fully extending this finger. The lesion has gradually developed over the past 6 months. A firm, hard, cordlike, 1x3 cm area is palpable beneath the skin of the left palm. Histologically this mass is most likely to be composed of
Calcification
Malignant cells
Caseous Material
Fibroblast
She has superficial fibromatosis that has produced a lesion best known as a Dupuytren contracture. These lesions contain mature fibroblasts surrounded by dense collagen. A hard, firm lesion of this size is unlikely to be a malignancy. An injury with granulation tissue should give rise to a stable scar, without such severe retraction. Dystrophic calcification refers to calcification that occurs in necrotic tissues; it is not commonly a localized mass.