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Alexia Rubio Peral

Complejo hospitalario la Mancha Centro. Alcázar de San Juan. Ciudad Real.

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Monday, 30 December 2019

DIAGNOSIS OF CYSTINURIA BY DIRECT VISION IN THE URINARY SEDIMENT


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Written by Alexia Rubio Peral | Ana Velasco Romero | M. Francisca García Codesal

DIAGNÓSTICO DE CISTINURIA POR VISIÓN DIRECTA EN EL SEDIMENTO URINARIO
Figure 1. Images taken in ordinary light (oc x10, obj x40) in which cystine crystals are observed at different degrees of maclation, more intense in the below image.

Cystinuria is a hyperaminoaciduria due to a defective transport of cystine and dibasic aminoacids (ornithine, arginine and lysine) in the apical membrane of the intestinal epithelium and the renal proximal tubule, which leads to an excess removal of cystine through urine. It is transmitted with an autosomal recessive inheritance pattern, with an average prevalence in neonates of 1/7000.