A novel case of concurrent renal tumors: chromophobe renal cell carcinoma and carcinoid tumor of the kidney with brief review of renal neuroendocrine tumors

Int J Surg Pathol. 2012 Oct;20(5):531-5. doi: 10.1177/1066896912438588. Epub 2012 Mar 27.

Abstract

Renal cell carcinoma of chromophobe type is a malignant neoplasm with characteristic large cells that exhibit prominent cell membranes. Primary renal carcinoid tumors are rare tumors with the histological appearance similar to well-differentiated neuroendocrine tumors at other sites. Chromophobe renal cell carcinoma with neuroendocrine differentiation is exceedingly rare. The authors describe a case of a chromophobe renal cell carcinoma and carcinoid tumor of the kidney presenting as distinct masses in the same kidney in a 34-year-old male. The histologic and immunohistochemical features of both the tumors were characteristic with no overlapping features. The carcinoid tumor presented at a higher stage with nodal metastasis. To the best of the authors' knowledge, this is the first case of 2 morphologically distinct tumors, one chromophobe renal cell carcinoma and the other primary carcinoid tumor in the same kidney.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Carcinoid Tumor / pathology*
  • Carcinoma, Renal Cell / pathology*
  • Cell Proliferation
  • Humans
  • Kidney Neoplasms / pathology*
  • Lymph Nodes / pathology
  • Male
  • Neoplasm Staging
  • Neoplasms, Multiple Primary*