title: Multicystic nephroma: report of a case with fine-needle aspiration findings.
abstract: This report presents the fine-needle aspiration biopsy (FNAB) findings of a multicystic renal tumor in a 52-yr-old woman. The aspirate smears contained clusters of cells with large, irregular nuclei and cytoplasmic vacuoles. Subsequent nephrectomy revealed a multicystic nephroma (MCN). Although most common in childhood, MCN should always be considered in the FNAB differential diagnosis of a multicystic renal mass in adult patients. Even in cases where the diagnosis of MCN is considered, it may be difficult to distinguish from cystic renal cell carcinoma on the basis of radiographic and FNAB findings.
authors.affiliation: Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City 52242-1009, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Hughes
authors.forename: T H
authors.initials: TH
authors.lastname: Niemann
authors.forename: P A
authors.initials: PA
authors.lastname: Thomas
mesh_terms: D001707:Biopsy, Needle; D002292:Carcinoma, Renal Cell / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000473:pathology*; D007680:Kidney Neoplasms / Q000473:pathology*; D008875:Middle Aged