title: Sonographically detected malignant transformation of a simple renal cyst.
abstract: The clinical course is reported of a simple renal cyst which developed into a septated renal cyst, and finally to a cystic renal cell carcinoma. A 49-year-old man, who had been diagnosed as having a renal cyst, was found by repeated ultrasonography over 6 years to have solid components developing within the cyst. Radical nephrectomy was performed, and pathological examination confirmed cystic renal cell carcinoma (RCC). This case clearly shows a natural history of malignant transformation from a simple renal cyst, and emphasizes that careful follow-up of renal cysts, especially of complicated renal cysts, is mandatory for successful treatment of RCC.
authors.affiliation: Department of Urology, Yokohama Minami Kyosai Hospital, Yokohama, Japan. fwnd2088@mb.infoweb.ne.jp
authors.forename: N
authors.initials: N
authors.lastname: Sakai
authors.forename: F
authors.initials: F
authors.lastname: Kanda
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.forename: H
authors.initials: H
authors.lastname: Fukuoka
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
mesh_terms: D000328:Adult; D002292:Carcinoma, Renal Cell / Q000473:pathology*; D002471:Cell Transformation, Neoplastic; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D014463:Ultrasonography