R. S., a white maIe, age 41, was admitted to the Jersey City Medical Center, January 23, 1936, compIaining of intermittent hematuria for one month. This had started as a termina1 bleeding of a few drops, with only occasiona slight burning at the end of micturition. Apart from this, the patient was quite comfortabIe, experiencing no dysuria, urgency, difficulty, frequency or other untoward symptom. He daiIy pursued his occupation as mechanical engineer, without restriction. Gradually, the bleeding increased from a few terminal drops to a compIete hematuria, with cIots, mucus shreds and occasiona fineIy granuIar calcareous material. ceIIs with conspicuous nuclei devoid of any demonstrabIe mitosis. The stroma was edematous, vascular and diffuseIy infiltrated with poIymorphonucIear neutrophiIes. The biopsy was considered inadequate to render a defmite diagnosis. The possibihty of papiIIoma was suggested.