Year 2024 / Volume 116 / Number 12
Letter
Clear cell renal cell carcinoma with small intestine invasion mimicking an intestinal tumor

717-718

DOI: 10.17235/reed.2024.10226/2023

Mengmeng Yu, Jun Li, Chang Xu,

Abstract
A 65-year-old man presented with asymptomatic retroperitoneal mass that had been detected on ultrasonography performed during a physical screening. He had no hematochezia, hematuria or any other symptoms. Tumor markers were normal, including alpha fetoprotein, carcinoembryonic antigen, neuron-specific enolase and cancer antigen 199. Abdominal CT demonstrated a retroperitoneal mass (white arrow) accompanied by significant thickening of the jejunal wall, involving the left kidney. After enhancement, the mass showed rapid enhancement at arterial phase and venous phase, showed washout at delayed phase. Multi-planar reformation revealed the mass involving the pancreatic tail and the left renal pelvis. Surgical resection was performed and pathological examination confirmed clear cell renal cell carcinoma involving pancreas and jejunum, with immunohistochemical results as follows: CK (partly +), Vimentin (partly +), Pax-8 (+), CD10 (+), P505s (partly +), CA-IX (+), TFE-3 (-), Syn (-), CgA (-), CD56 (+), S-100 (-), SOX-10 (-), HMB-45 (-), Desmin (-),CD117 (-), DOG-1 (-), Melan-A (-), SMA (-), CD34 (+), CD31 (+), CD68 (+), Ki67 (5%+). Discussion:
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References
1. Yu Q, Zhang Z, Ma Y, E S, Zhao L. Clinical analysis of renal cell carcinoma with intestinal metastasis resulting in small bowel and colon fistula. Rev Esp Enferm Dig. Published online November 30, 2023. doi:10.17235/reed.2023.10054/2023
2. Wasifuddin M, Gomez D' Aza DJ, Pokhrel A, Manvar K, Wang JC. Recurrent Left Renal Fossa Clear Cell Renal Cell Carcinoma With Pancreatic Tail Invasion Presenting as Intestinal Obstruction. Cureus. 2023;15:e47953.
3. Kimura J, Okabayashi T, Sui K, et al. Clinicopathological Features and Surgical Outcomes of Small Bowel Metastasis from Renal Cell Carcinoma. Acta Med Okayama. 2022;76:155-165.
4. Kopp RP, Aganovic L, Palazzi KL, Cassidy FH, Sakamoto K, Derweesh IH. Differentiation of clear from non-clear cell renal cell carcinoma using CT washout formula. Can J Urol. 2013;20:6790-6797.
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Yu M, Li J, Xu C. Clear cell renal cell carcinoma with small intestine invasion mimicking an intestinal tumor. 10226/2023


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Publication history

Received: 30/12/2023

Accepted: 10/01/2024

Online First: 23/01/2024

Published: 13/12/2024

Article Online First time: 24 days

Article editing time: 349 days


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