Biomedical subjects
Publications and source records attributed to K G Ryan.
Two cases of papillary carcinoma of the bladder are presented in which the ureter could not be demonstrated by standard radiographic techniques. Computed tomography (CT) allowed identification of the tumor filled ureter. Intraureteral papillary tumor has a radiographic density (CT number) above that of water but less than that of the enveloping ureter.
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An unusual case of chronic renal failure associated with an abnormal intravenous urogram simulating renal neoplasm is discussed. Extensive radiographic and histologic studies support the contention that the observed mass lesion resulted from a segmental or regional compensatory hypertrophy. It is likely that this case represents a variant of unilateral glomerulonephritis with sparing of a segment or lobe of one kidney and subsequent hypertrophy of that segment as the remaining renal mass atrophied.
Renal artery stenosis causing hypertension may be the sequel of blunt nonpenetrating abdominal trauma. Early recognition of such renal artery injury is essential. In the case reported, late recognition of unilateral traumatic renal artery stenosis led to surgical correction of the lesion and lasting cure of hypertension.
A case of tumorlike eosinophilic infiltration of the duodenum and pancreas is reported. Arteriography and hypotonic duodenography indicated a large lesion involving both the pancreatic head and the second portion of the duodenum without encasement or obstruction of the intrinsic vasculature. This is the first reported use of angiography in this condition. The combination of findings described should suggest a benign infiltrative process.