A low grade, locally aggressive, fibroblastic neoplasm that occurs primarily in the distal extremities. It is characterized by the presence of spindle-shaped fibroblasts, multivacuolated lipoblast-like cells, bizarre ganglion-like cells with inclusion-like nuclei, myxoid stroma formation, and a mixture of acute and chronic inflammatory cells. Distant metastases are very rare. [from
NCI]