Colon cancer mimicking renal cell carcinoma

Case contributed by Dr Ahmed Abdrabou


Abdominal swelling, vomiting and dyspepsia

Patient Data

Age: 60 years
Gender: Male

Scout image reveals scanty of gas at the right side of the abdomen. CT images reveal a large irregular shaped heterogeneous mass related to the inferior pole of the right kidney with posterior rounded hemorrhagic component (bleeding in preexisting renal cyst). The mass extends anteriorly compressing and displacing the ascending colon with no line of separation in-between and displaces the adjacent bowel to the left side. There is compression on the right ureter and back pressure changes on the right kidney.

Diagnosis: Exophytic adenocarcinoma of the ascending colon (pathology proven) 

Annotated image

The red arrows refer to the ascending colon inseparable from the mass.

Case Discussion

Provisional diagnosis was renal cell carcinoma before the pathology made it clear. Large abdominal mass may induce difficulties spotting its original location.

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Case information

rID: 28986
Published: 25th Apr 2014
Last edited: 1st Jul 2020
Inclusion in quiz mode: Included