Late-Diagnosed PKU Linked to Depression in Children
A 2026 Egyptian study of 76 children found a sharp mental-health gradient in phenylketonuria (PKU): late-diagnosed children had higher depression scores, lower quality of life, lower IQ, and a 21.4% rate of reported suicidal thoughts. Early-diagnosed children still differed from controls on some functioning measures, but the late-diagnosed group carried the heaviest psychiatric and cognitive …