Neonatal Adrenoleukodystrophy (NALD) is a genetic disorder that affects the breakdown of very long-chain fatty acids in the body. This condition is also known by several synonyms such as infantile Refsum disease, pseudo-Zellweger syndrome, neonatal peroxisomal disease, and Zellweger syndrome spectrum. Infants affected by this disorder might have several physical and developmental symptoms, including low muscle tone, seizures, hearing loss, vision problems, and delayed growth and development. Early diagnosis and treatment can help alleviate some symptoms and improve a child's quality of life. NALD is a rare condition, and if you suspect your child has symptoms of NALD, it is crucial to consult a medical professional.