The sections show a multi-loculated cystic lesion embedded within dense fibro-adipose tissue and skeletal muscle (consistent with abdominal wall). The cystic structures are lined by focally denuded, flattened-to-cuboidal epithelium. The underlying stroma is characterized by marked, dense fibrosis (scarring) and prominent chronic inflammation, consisting predominantly of lymphocytes and plasma cells, along with scattered hemosiderin-laden macrophages suggesting prior hemorrhage. Smooth muscle bundles are noted within the cyst wall. The adjacent skeletal muscle shows mild interstitial fibrosis. There is no evidence of cytologic atypia, high-grade dysplasia, or invasive malignancy in the sections examined.
Urinary bladder mass ?? Recurrent urachal cyst.
Fibrofatty soft tissue mass designated as remnants of a urachal cyst, measuring 6 x 3 x 2.5 cm. The mass is partially covered by abdominal wall skin measuring 3 x 2.5 cm, with attached bladder wall tissue measuring 2.2 cm. There is additionally attached fatty tissue measuring 3 x 3x 0.6 cm.
Abdominal Wall/Bladder Mass, excision biopsy: