PURPOSE: Ever since the recognition of the @entity1179 as a distinct lesion of the urinary tract, there has been discussion about the possible (pre)malignant potential of this rare @entity5 , with subsequent uncertainty about followup. Hampering the discussion are the low frequency, the unknown etiology, the difficult histopathological diagnosis and the reported association with @entity1606 . We reviewed the literature and studied our @entity1 , resulting in the largest series reported in the literature to date. MATERIALS AND METHODS: We selected 51 @entity1 with an @entity1179 without a history of or a concordant transitional cell @entity3484 . Histology of all @entity1 was reviewed. RESULTS: After review, as many as 14 @entity1 appeared to be misdiagnosed ( @entity1606 in 11). In 37 @entity1 , we could confirm the diagnosis of @entity1179 , with characteristics that were highly comparable to those described in the literature. Only 1 @entity1 had a superficial @entity150 after 49 months. CONCLUSIONS: Reviewing these data and our own results, we conclude that an @entity1179 does not seem to be a risk factor for @entity1606 , although @entity1179 and @entity1606 appear to be related to some extent. Therefore, frequent and long-term followup does not seem to be necessary provided that there is no doubt about the difficult histological diagnosis.

The prognostic value of a primary XXXX of the urinary tract.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity3484 :: ('MESH:D014571', 'Disease') :: ['carcinoma of the urinary tract'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity1179 :: ('MESH:D018308', 'Disease') :: ['inverted papillomas', 'inverted papilloma'] @entity1606 :: ('MESH:D002295', 'Disease') :: ['transitional cell carcinoma'] @entity150 :: ('MESH:D001749', 'Disease') :: ['bladder tumor']
@entity1179 :: (MESH:D018308,Disease) :: ['inverted papilloma']
