Zwapniały włókniak rozcięgna

A rare, superficial fibromatosis characterized by non-malignant, locally invading, fibrosing tumour of differentiated fibroblasts, slowly growing subcutaneously, occurring predominantly distally on the extremities, especially the hands and feet. Histologic examination shows a multinodular pattern with large areas of calcification and fibrosis, and the presence of elongated spindle cells with hyperchromatic plump vesicular nuclei interspersed within fine bands of collagen.