Abdominal desmoid tumor
Abdominal wall lump.
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Fairly homogeneous lobulated soft tissue mass residing on the anterior abdomino-pelvic wall. It appears to blend with the musculature and has a similar density to muscle.
- Microscopic examination shows a spindle cell lesion composed of bland looking spindle cells within collagenous stroma that contains occasional thin-walled non-branching blood vessels highlighted by CD34. The tumor cells show patchy nuclear staining for B-Catenin and are negative for CD34.
- Features are in keeping with deep fibromatosis / desmoid tumor.