cabeAEBM
cabecera14

Alejandro José Ravelo Marrero

Servicio de Bioquímica Clínica. Hospital Ramón y Cajal

Thursday, 30 April 2020

ATYPICAL URINARY PRESENTATION OF CALCIUM OXALATE MONOHYDRATE KIDNEY STONES

Written by Ana María García Cano | Alejandro José Ravelo Marrero | Alba Arroyo Vega

ASPECTO ATÍPICO EN CÁLCULO URINARIO DE OXALATO CÁLCICO MONOHIDRATADO
Figure 1. Set of kidney stones of the same patient (a), examined individually according to their appearance (b, c and d). Typical calcium oxalate monohydrate kidney stone (e). Several kidney stones of 388.5 mg corresponding to the same patient (a). Depending on their appearance three kidney stones are distinguised: the first is brown, smooth, rounded surface and hard fracture consistency (b). The second is light brown, smooth, rounded surface and hard fracture consistency (c). The third is grayish, with a rough surface, and intermediate hardness (d).

Kidney stones belong to a 54-year-old patient with surgical history of multiple renal lithiasis, who presents an episode of left obstructive uropathy with infection due to a new event of lithiasis. She required a double J stent placement.

Wednesday, 30 September 2020

EARLY DETECTION OF SULPHADIAZINE CRYSTALS IN URINE

Written by Alejandro José Ravelo Marrero | Pablo Mediavilla Santillán | Olga Campos Noceda

DETECCIÓN PRECOZ DE CRISTALES DE SULFADIAZINA EN ORINA
Figure 1. Sulphadiazine crystals with wheat sheaf-shaped with eccentric binding morphology corresponding to the first urine sample sent to the laboratory (a) and the second urine sample (two days later) (b). Pictures at 20 and 40 increases.
 
A 49-year-old male HIV positive patient came to hospital for sudden impairment of his writing capacity of new onset without other associated symptoms. A cerebral nuclear magnetic resonance was performed, showing a space occupying lesion in the right temporoparietal space with cortical involvement, ring enhancement and associated perilesional edema. He began oral corticosteroid treatment and became asymptomatic.