Abdominal desmoid tumor

Discussion:

MACROSCOPIC DESCRIPTION: 

A soft white core biopsy 18mm long and 1mm in diameter.

MICROSCOPIC DESCRIPTION:

Sections show a core paucicellular fibrous tissue composed of bundles of collagen interspersed with bland stellate fibroblasts and a few small vessels. In immunostains, there is strong nuclear staining for beta-catenin.

DIAGNOSIS: Core biopsy of abdominal lesion: Fibrous tissue suggestive of a desmoid tumor.

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