A Urine Sample with an Orange to Red Hue, What Should We Do?

[摘要] A urine sample submitted for a urinary calcium-to-creatinine ratio was visually clear but deep orange in color (Fig. 1, left). Acidification of the sample to pH <2.0 with HCl prior to analysis produced a color change in the sample from orange to deep red (Fig. 1, right). The 16-year-old female patient had a history of polycystic ovarian syndrome, oligomenorrhea, and …

[学科分类] 过敏症与临床免疫学