A 3-year-old boy from rural Maharashtra is brought with developmental delay, light-colored skin, and a musty odor. Plasma phenylalanine is 28 mg/dL (normal <2). Urine shows no succinylacetone. Which finding would distinguish this child's condition from alkaptonuria?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.