H J van Tonder

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A brownish discoloration of the bladder mucosa around the ureteric orifices has been observed on cystoscopy in three patients taking excessive quantities of analgesics. Biopsy specimens revealed an unusual degree of hyalinization of the vessels in the submucosa. Similar changes have been noted in the renal medulla, pelvis, and ureter of patients with(More)
Light and scanning electron microscopy was performed on the penes of Chacma baboons to establish their suitability as animal model for studying vascular impotence. Analogous aging penile vascular changes were found in man, and a fibrous trabeculopathy with intertrabecular senechiae was demonstrated. Considering the corresponding changes, the Chacma baboon(More)
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