[A case of XXXX causing ureteral obstruction: report of a case].

@entity808 @entity1 @entity39 @entity5 @entity3928 @entity158 @entity6191
@entity808 are rare @entity5 . They are usually asymptomatic, and often become quite large before they are discovered. A case is reported of a 75-year-old @entity1 with complaints of @entity6191 and @entity158 . Intravenous pyelography showed left renal nonfunctional and retrograde pyelography revealed the stenosis of the left ureter. The ultrasonogram demonstrated a @entity3928 , and it was diagnosed as a @entity5 with central @entity39 by computerized tomography and magnetic resonance imaging. The @entity5 was removed with the left nonfunctioning kidney and ureter. The @entity5 was 3 x 3 x 4 cm, and the histological diagnosis was @entity808 (Antoni A + B type). There was a tight fibrous adhesion between the @entity5 and the left ureter, and the @entity5 was concluded to have originated from the adventitia of ureter. To date, 120 benign cases have been reported in Japan. They are reviewed and discussed.
