[Hemorrhagic calico papillitis. Clinical picture of pyelitic hematuria with special reference to cytodiagnostic problems].

A case is reported of hemorrhagic calico papillitis showing unilateral hematuria. There was no evidence of pathological changes either in i.v.P. or in retrograde pyelogram, angiogram, or angiogram with epinephrine. Large were found in the urine papillary cellgroups, suspicious for papilloma of the renal pelvis. It is pointed on the difficulty of differentiating such cellgroups from real papillomas of the renal pelvis. Possible are discussed causes of this mucosa proliferation and dysplasia. If there is found the following trias: unilateral hematuria, pseudopapillomatous cellgroups in urine, missing pathological changes in urological X-ray examinations (or only minimal blurs at the fornices) the diagnosis of calico papillitis has to be considered carefully.