title: A case of medullary sponge kidney (Cacchi-Ricci disease) mimicking a renal mass.
abstract: Medullary sponge kidney (MSK) is an uncommon benign congenital disorder, generally asymptomatic. In symptomatic patients the diagnosis is usually made by excretory urography performed in the most frequent complications such as renal stones, urinary tract infections and haematuria. Excretory urography can be very characteristic, showing cystic collections of ectatic collecting ducts like "bunches of grapes" or "bouquet of flowers". When haematuria represents the only symptom, and radiographic findings are not characteristic of MSK, the differential diagnosis with a renal tumor can be very difficult. We report a case of MSK that underwent nephrectomy since clinical and radiological features mimicked a renal tumor.
authors.affiliation: Department of Pathology and Medicine of Laboratory, Section of Pathological Anatomy and Histology, University of Parma, Italy.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Fellegara
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Froio
authors.forename: Tu-Vinh
authors.initials: TV
authors.lastname: Luong
authors.forename: Nicoletta
authors.initials: N
authors.lastname: Campanini
authors.forename: Francesco
authors.initials: F
authors.lastname: Facchini
authors.forename: Pietro
authors.initials: P
authors.lastname: Cortellini
authors.forename: Massimo
authors.initials: M
authors.lastname: Melissari
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007668:Kidney / Q000473:pathology; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D007691:Medullary Sponge Kidney / Q000175:diagnosis* / Q000601:surgery; D008875:Middle Aged; D009392:Nephrectomy