FECH and erythropoietic protoporphyria: Among the 50 patients, 3 individuals were identified as carriers of AHP, suggesting a prevalence rate of 6% in this cohort, all with one pathogenic variant identified as a FECH gene mutation, associated with autosomal recessive erythropoietic protoporphyria; 76% were negative, 6% were uncertain results, and 12% failed results.