Colonoscopy and biopsy confirmed the presence of an underlying adenocarcinoma.

Pseudokidney sign is a non-specific sign which could be observed when there is a bowel wall thickening which apposes mucosal surfaces giving an echogenic stripe. The differential diagnosis includes carcinoma, lymphoma, inflammatory colitis and necrotizing enterocolitis, among others. In some cases, this sign could be observed in other entities such as intussusception, with a hyperechoic mesenterium in the center of the pseudokidney. A pathological lesion is found behind pseudokidney pattern in most of cases.