[Primary localized amyloidosis of the urinary tract. A case series of five patients].
OBJECTIVE
To describe the clinical and radiographic features of patients with primary localized amyloidosis of the urinary tract.


METHODS
We report a case of localized amyloidosis of the ureters and bladder. The medical records of four other cases from the French Register of localized amyloidosis were reviewed.


RESULTS
The mean age of three men and two women was 53 years. All patients presented with gross hematuria, four patients presented with renal colic, only one patient had irritative lower urinary tract symptoms. Ureter and bladder were involved in three patients, both ureters in two patients and the bladder only, in one patient. Clinical and radiographic presentations mimicked a neoplasia excluded by histologic analysis. Immunohistochemical study was performed in only two cases and revealed lambda light chain amyloidosis. The median follow-up was eight years. Various treatments were performed, and recurrences occurred in two cases. None of the five patients developed monoclonal gammapathy or systemic amyloidosis.


CONCLUSIONS
Primary localized amyloidosis of the urinary tract is a rare disorder and can easily be confused with a neoplasm. The physiopathology is unknown, the prognosis is usually good. There is no specific treatment, and repeated work-up for systemic amyloidosis is unnecessary as local recurrences appear to be the main complication.
Duffau
P
P
Service de médecine interne, hôpital Saint-Esprit, route de Villeneuve/Lot, 47923 Agen cedex, France. pierreduffau@caramail.com
Imbert
Y
Y
De Faucal
P
P
Fleury
D
D
Arlet
P
P
Camou
F
F
Etienne
G
G
Paccalin
M
M
D000328:Adult; D000368:Aged; D000686:Amyloidosis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014515:Ureteral Diseases / Q000175:diagnosis*; D001745:Urinary Bladder Diseases / Q000175:diagnosis*