title: Chromophobe renal cell carcinoma: useful diagnostic application of imprint cytology and fluorescence in situ hybridization of chromosomes 10 and 21 in two cases of typical and eosinophilic variants.
abstract: Chromophobe renal cell carcinoma (RCC) is subdivided into typical and eosinophilic variants. We report such two cases with focus on imprint cytology and fluorescence in situ hybridization (FISH). The first case is a 53-year-old Japanese man and the second is a 76-year-old Japanese man. Histologically, the diagnosis of typical and eosinophilic variants of chromophobe RCC was suspected. In imprint cytology, irregularity of nuclear membrane, binucleation, perinuclear halo, and thick cell border were observed. Immunohistochemically, neoplastic cells of both tumors were positive for cytokeratin 7, E-cadherin, c-kit, and CD10. In FISH study, both tumors revealed the monosomy of chromosomes 10 and 21. Additionally, FISH study in eosinophilic variant of chromophobe RCC showed the disomy of chromosomes 7 and 17. In conclusion, we suggest that the combination study of imprint cytology and FISH of chromosomes 10 and 21 as well as routine histology may contribute to the accurate diagnosis of chromophobe RCC.
authors.affiliation: Departments of Diagnostic Pathology, Kochi Red Cross Hospital, 2-13-51 Shin-honmachi, Kochi, 780-8562, Japan. kurochankochi@yahoo.co.jp
authors.forename: Naoto
authors.initials: N
authors.lastname: Kuroda
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Katto
authors.forename: Tadanori
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Takako
authors.initials: T
authors.lastname: Kawada
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Imamura
authors.forename: Ondrej
authors.initials: O
authors.lastname: Hes
authors.forename: Michal
authors.initials: M
authors.lastname: Michal
authors.forename: Taro
authors.initials: T
authors.lastname: Shuin
authors.forename: Gang-Hong
authors.initials: GH
authors.lastname: Lee
mesh_terms: D002292:Carcinoma, Renal Cell / Q000145:classification / Q000175:diagnosis* / Q000235:genetics* / Q000473:pathology; D002879:Chromosomes, Human, Pair 10; D002886:Chromosomes, Human, Pair 17; D002891:Chromosomes, Human, Pair 21; D002897:Chromosomes, Human, Pair 7; D003584:Cytological Techniques; D004804:Eosinophils; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007564:Japan; D007680:Kidney Neoplasms / Q000145:classification / Q000175:diagnosis* / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged