title: Review of acquired cystic disease-associated renal cell carcinoma with focus on pathobiological aspects.
abstract: Acquired cystic disease (ACD)-associated renal cell carcinoma (RCC) is a recently established entity. In this article, we introduce the general view of this new entity. Macroscopically, the disease exclusively occurs in ACD and may arise as a dominant mass or non-dominant masses. Histologically, the tumor is characterized by a microcystic pattern, neoplastic cells with an eosinophilic or oncocytic cytoplasm and frequent intratumoral oxalate crystal deposition. Prominent nucleoli of tumor cells are often observed. Immunohistochemically, neoplastic cells are generally positive for AMACR but negative for cytokeratin 7. Ultrastructurally, neoplastic cells contain abundant mitochondria in the cytoplasm. Genetically, the gain of chromosomes 3, 7, 17 and abnormality of the sex chromosome were frequently observed in several studies. In conclusion, ACD-associated RCC may be widely recognized as a distinct entity in the near future because this tumor is morphologically and genetically different from other renal tumor entities that have been previously established.
authors.affiliation: Department of Diagnostic Pathology, Kochi Red Cross Hospital, Kochi, Japan. kurochankochi@yahoo.co.jp.
authors.forename: Naoto
authors.initials: N
authors.lastname: Kuroda
authors.forename: Chisato
authors.initials: C
authors.lastname: Ohe
authors.forename: Shuji
authors.initials: S
authors.lastname: Mikami
authors.forename: Ondrej
authors.initials: O
authors.lastname: Hes
authors.forename: Michal
authors.initials: M
authors.lastname: Michal
authors.forename: Matteo
authors.initials: M
authors.lastname: Brunelli
authors.forename: Guido
authors.initials: G
authors.lastname: Martignoni
authors.forename: Yasuharu
authors.initials: Y
authors.lastname: Sato
authors.forename: Tadashi
authors.initials: T
authors.lastname: Yoshino
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Kakehi
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 / Q000453:epidemiology / Q000235:genetics / Q000473:pathology*; D003560:Cysts / Q000453:epidemiology / Q000235:genetics / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007668:Kidney / Q000473:pathology; D052177:Kidney Diseases, Cystic / Q000453:epidemiology / Q000235:genetics / Q000473:pathology*; D007680:Kidney Neoplasms / Q000453:epidemiology / Q000235:genetics / Q000473:pathology*; D011379:Prognosis