PMID: 11927968Apr 3, 2002Paper

Renal pelvic carcinoma with unusual appearance simulating amyloidosis (myeloma kidney): a report of five cases

International Journal of Surgical Pathology
Ondrej HesLudek Baumruk

Abstract

We describe 5 cases of urothelial carcinoma (UC) of the renal pelvis, which grew in a distinctive gross and microscopical pattern into the renal parenchyma. Five patients (2 men and 3 women, mean age 67.4 years) underwent nephrectomy for vague clinical findings. The cut surface of the tumor was white to light gray and the consistency was elastic. The corticomedullary border was indistinct, resulting in an appearance that suggested amyloidosis or myeloma. The renal pelvis showed normal mucosa with areas of dysplastic changes. The tumors spread from the renal pelvis in a diffuse and irregular, infiltrative pattern and surrounded intact glomeruli. Detailed sampling of invasive tumor component showed foci of UC with transitions to clear squamous cells. The predominant clear squamous neoplastic cells had foci of granular eosinophilic cytoplasm and resembled conventional renal cell carcinoma. Four patients were alive and without signs of the disease for 5 months to 4 years after nephrectomy; 1 died of generalized tumor 7 months after nephrectomy. The unusual gross and microscopic features result in varied problems in differential diagnosis, which are discussed herein.

References

Aug 1, 1992·Human Pathology·K DonhuijsenL D Leder
May 1, 1992·The American Journal of Surgical Pathology·S KumarD F Cowan
May 1, 1989·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·J DelladetsimaC Kittas
Nov 1, 1986·Histopathology·S Fleming, H J Lewi
Nov 8, 1971·JAMA : the Journal of the American Medical Association·H GrabstaldM R Melamed
Feb 1, 1984·The American Journal of Surgical Pathology·R M KenneyM Tabernero

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Citations

May 6, 2016·The British Journal of Radiology·Qingqiang ZhuWenxin Chen
Feb 14, 2006·Modern Pathology : an Official Journal of the United States and Canadian Academy of Pathology, Inc·Delia Perez-MontielSaul Suster

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