Biomedical subjects
Publications and source records attributed to B R Subramanyam.
Renal emphysema is most often due to emphysematous pyelonephritis in diabetics. The emphysema is the result of infection by gas-forming organisms. Intrarenal gas can also be seen under noninfective conditions. The report is a case of renal emphysema following traumatic renal infarction.
Sonography was utilized to assess six patients with renal transitional cell carcinoma and was correlated with gross pathology in five cases. The neoplasms were seen as discrete, solid masses causing separation of the central renal sinus echoes. The echogenicity of the tumors and the renal parenchyma was similar, but the neoplasms were separated from the renal parenchyma by a linear echogenic zone of renal sinus fat. Pelvicaliceal blood clots, when markedly echogenic, could be differentiated from transitional cell carcinomas. Sonography contributed most in evaluating unilateral nonvisualized kidney or in the presence of nonfilling of the affected pelvicalices on excretory urography.
Due to the widespread use of CT for tumor staging and diagnostic workup, the discovery of metastatic neoplasm to the kidney has become a more frequent occurrence. Nine patients with metastatic carcinoma to the kidney have been studied by CT, including six by sonography. Carcinoma of the lung was the primary tumor in eight. Bilateral renal involvement was seen in all cases. The presentation of the clinical and radiologic findings in these cases with differential diagnosis is included.