8821/1 Aggressive fibromatosis


Extra-abdominal desmoid
Desmoid, NOS
Invasive fibroma


Connective, subcutaneous and other soft tissues
ICD-O-3 topography code: C49

An insidious poorly circumscribed neoplasm arising from the deep soft tissues of the abdomen. It is characterized by the presence of elongated spindle-shaped fibroblasts, collagenous stroma formation, and an infiltrative growth pattern.