(Solved): %3Cdiv%3E%3Cp%3EGenevieve%2C concerned for her 2-month-old infant son%2C Mateo%2C brought him to his ...

%3Cdiv%3E%3Cp%3EGenevieve%2C concerned for her 2-month-old infant son%2C Mateo%2C brought him to his pediatrician. She explains that their current visit is because Mateo developed multiple blisters on his exposed skin when they had only been outside for a short period%2C and his urine-soaked diaper appears reddish. The pediatrician checks his current diaper with long-wave UV light and notes fluorescence.%0A%0AWhat porphyria should be suspected%3F%0A%0AHow is this porphyria classified%3F%0A%0AWhat is the first analyte that should be measured%2C and in which body fluid%3F%0A%0AMateo’s mother was instructed to collect urine and stool samples and bring them to the laboratory for Uro I and Copro I analysis. A blood sample was also collected and sent at the same time. Only the blood sample was positive. What preanalytical error could lead to this false result%3F%0A%0A%3C%2Fp%3E%3C%2Fdiv%3E%3Cdiv%3E%3C%2Fdiv%3E