Abdominal desmoid tumor

Case contributed by James Sheldon


Abdominal pain

Patient Data

Age: 40 years
Gender: Female

Abdominal mass measures 17 x 8 x 16 cm with regions of cystic degeneration/necrosis within the right side of the mass - the largest low density region measures 4.5 x 5.2 cm.

The mass displaces the bowel to the periphery.

No evidence of bowel obstruction.

No further focal nodule identified within the peritoneal or retroperitoneal spaces.

The solid organs of the upper abdomen are unremarkable.

Case Discussion


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


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.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.