Renal cell carcinoma, chromophobe type, with collecting duct carcinoma and sarcomatoid components

Arch Pathol Lab Med. 2003 Jan;127(1):e38-40. doi: 10.5858/2003-127-e38-RCCCTW.

Abstract

We report a case of a 72-year-old man with a chromophobe renal cell carcinoma that had both sarcomatoid and collecting duct carcinoma components. The 7-cm tumor occupied the entire lower pole of the kidney and infiltrated the renal parenchyma and the pelvic-calyceal system. Histologically, it had an area of classic chromophobe renal cell carcinoma that merged into a sarcomatoid component. Closely intermixed with the sarcomatoid component was a collecting duct carcinoma component characterized by highly pleomorphic, epithelioid cells arranged in cords, nests, and tubulomicrocystic structures. The cords, nests, and tubules were associated with a florid desmoplastic stromal response and numerous inflammatory cells. In addition, dysplastic changes were noted in adjacent nonneoplastic collecting duct epithelium. Immunohistochemical studies confirmed the presence of 3 distinct components in this patient's tumor. To the best of our knowledge, this is the first reported case of a chromophobe renal cell carcinoma with sarcomatoid and collecting duct carcinoma components.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Carcinoma / diagnosis
  • Carcinoma / pathology
  • Carcinoma, Renal Cell / diagnosis
  • Carcinoma, Renal Cell / pathology*
  • Humans
  • Immunohistochemistry
  • Kidney Neoplasms / diagnosis
  • Kidney Neoplasms / pathology*
  • Kidney Tubules, Collecting* / pathology
  • Male
  • Sarcoma / diagnosis
  • Sarcoma / pathology