nodular fasciitis

(redirected from pseudosarcomatous fibromatosis)

fasciitis

 [fas″e-i´tis]
inflammation of a fascia.
necrotizing fasciitis a fulminating group A streptococcal infection beginning with severe or extensive cellulitis that spreads to involve the superficial and deep fascia, producing thrombosis of the subcutaneous vessels and gangrene of the underlying tissues. A cutaneous lesion usually serves as a portal of entry for the infection, but sometimes no such lesion is found.
nodular fasciitis (proliferative fasciitis) a benign, reactive proliferation of fibroblasts in the subcutaneous tissues and commonly associated with the deep fascia.
pseudosarcomatous fasciitis a benign soft tissue tumor occurring subcutaneously and sometimes arising from deep muscle and fascia.

nod·u·lar fas·ci·i·tis

a rapidly growing tumorlike proliferation of fibroblasts, not thought to be neoplastic, with mild inflammatory exudation occurring in fascia; the fibrosis may infiltrate surrounding tissue but does not progress indefinitely or metastasize.

nodular fasciitis

A benign, rapidly growing reactive proliferation of fibroblasts in the deep dermis/subcutis on the arms, trunk, or neck of young adults (mean age 34), usually measuring < 3 cm. 

DiffDx
Dermatofibroma, DFSP, other fasciitides (fibroma of tendon sheath, intravascular, parosteal), fibromatosis, fibrosarcoma, fibrous histiocytoma, inflammatory myofibroblastic tumour, leiomyosarcoma, myxoid tumours, spindle-cell sarcoma.
References in periodicals archive ?
It is also known as subcutaneous pseudosarcomatous fibromatosis, infiltrative fasciitis, or proliferative fasciitis.
Differential diagnoses for MO include osteosarcoma, malignant fibrous histiocytoma, osteochondroma, foreign-body granuloma, giant cell tumor of soft tissue (osteoclastoma), atypical fibroxanthoma, pseudosarcomatous fibromatosis (nodular fasciitis), and deep vein thrombosis.
It was first described in 1955 by Konwaler et al, who called the lesion subcutaneous pseudosarcomatous fibromatosis, t In the early 1960s, the disease became known as nodular fasciitis; other terms used in the literature include proliferative fasciitis, infiltrative fasciitis, productive fasciitis, subcutaneous fibromatosis, and nodular fibrositis.