title: [Keratinizing squamous metaplasia (cholesteatoma) of the upper urinary tract].
abstract: Presentation of four cases of keratinizing squamous metaplasia (KSM), two of the renal pelvis, one pyelocaliceal and one ureteral. Nephrouretetectomy was performed in all cases. All our patients showed good evolution. A review of the literature is made discussing all the etiological, diagnostic and therapeutical aspects of the condition. Its benign evolution is highlighted as well as the current need, once a better knowledge of the condition's natural history is available, of using a conservative approach.
authors.affiliation: Servicio de Urología, Hospital General de Albacete.
authors.forename: J M
authors.initials: JM
authors.lastname: Pastor Guzmán
authors.forename: I
authors.initials: I
authors.lastname: Hernández Millán
authors.forename: A S
authors.initials: AS
authors.lastname: Salinas Sánchez
authors.forename: M
authors.initials: M
authors.lastname: Martínez Martín
authors.forename: L
authors.initials: L
authors.lastname: Cañamares Pabolaza
authors.forename: R
authors.initials: R
authors.lastname: Ruiz Mondejar
authors.forename: J A
authors.initials: JA
authors.lastname: Virseda Rodríguez
mesh_terms: D002781:Cholesteatoma / Q000175:diagnosis / Q000601:surgery; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014515:Ureteral Diseases / Q000175:diagnosis / Q000601:surgery
vernacular_title: Metaplasia escamosa queratinizante (colesteatoma) del tracto urinario superior.