Ultrasonic diagnosis of abdominal wall desmoid tumor.

Abdominal wall desmoid tumor is a rare, locally invasive proliferation of mature fibrous tissue which does not metastasize. It usually presents as an asymptomatic mass, and occurs most frequently in young women after childbirth. All three of our patients showed an echo-free mass deep in the abdominal wall with poor sonic transmission. Ultrasound cannot only accurately localize the lesion, but allows the radiologist to suggest the correct diagnosis.