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Radiology, Vol 173, 431-434, Copyright © 1989 by Radiological Society of North America

ARTICLES

Hyperechoic medulla of the kidneys

K Toyoda, Y Miyamoto, M Ida, S Tada and M Utsunomiya
Department of Radiology, Jikei University School of Medicine, Tokyo, Japan.

Eighteen patients were identified in whom ultrasound (US) of the kidney demonstrated a hyperechoic medulla. Diagnoses in the patients included gout in seven; Sjogren syndrome in two; medullary sponge kidney in two; primary aldosteronism in two; and Lesch-Nyhan syndrome, hyperparathyroidism, glycogen storage disease type XI, Wilson disease, and pseudo-Bartter syndrome in one each. The pathogenesis of the echogenicity was evaluated by comparing the findings from computed tomography and conventional radiography. It appears that a hyperechoic medulla is caused by hyperuricemia, medullary nephrocalcinosis, or hypokalemia. US is considered to be useful in evaluating renal involvement in patients with these diseases.


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