Figure 5a. Aggressive fibromatosis in a 38-year-old woman. (a) Coronal reformatted image of the right axilla from a contrast-enhanced multidetector CT study shows a mass (M) inferior to the scapula (S) with invasion of the surrounding musculature (arrows). (b) Photograph of the resected specimen shows a mass (M) of dense trabeculated fibrous tissue with invasion of adjacent structures (arrowheads).