Cytology of pigmented renal cell carcinoma. A case report.
BACKGROUND
Pigmented renal cell carcinoma is very rare, and there have been no reports on its cytologic findings.


METHODS
A 40-year-old female with pigmented renal cell carcinoma had cytologic findings similar to those of clear cell carcinoma except for the presence of melaninlike brown pigment.


CONCLUSIONS
It is important to recognize that renal cell carcinoma may contain melaninlike brown pigment seen on cytologic examination of renal aspirates.
Hirokawa
M
M
Department of Pathology, Kawasaki Medical School, Kurashiki, Japan. hirokawa@med.kawasaki-m.ac.jp
Sakurai
T
T
Shimizu
M
M
Manabe
T
T
Kanahara
T
T
D000328:Adult; D002292:Carcinoma, Renal Cell / Q000737:chemistry / Q000150:complications / Q000473:pathology*; D003594:Cytoplasmic Granules / Q000737:chemistry; D005260:Female; D006417:Hematuria / Q000209:etiology; D006801:Humans; D007680:Kidney Neoplasms / Q000737:chemistry / Q000150:complications / Q000473:pathology*; D008543:Melanins / Q000032:analysis*; D014411:Neoplastic Stem Cells / Q000737:chemistry / Q000648:ultrastructure; D010858:Pigmentation
D008543:Melanins