what are the symptoms of pku
Phenylketonuria: Symptom Checkers. Review the available symptom checkers for these symptoms of Phenylketonuria: 1  Mental retardation -- Symptom Checker. 2  Hypopigmentation -- Symptom Checker. 3  Poor infant feeding -- Symptom Checker. 4  Vomiting -- Symptom Checker. 5  Irritability -- Symptom Checker. 6  Short stature -- Symptom Checker. 7  Small head -- Symptom Checker.