Some central nervous system disorders are dangerous not because they cannot be treated, but because they hide behind the wrong diagnosis for years. In this medical storytelling video, we explore sepiapterin reductase deficiency, or SRD, a rare inherited metabolic disorder that affects the brain’s ability to produce key neurotransmitters such as dopamine and serotonin. SRD can look like cerebral palsy, developmental delay, dystonia, unclear speech, unsteady walking, daytime sleepiness, or even behavioral and psychiatric symptoms. In this real case, a young man was thought to have neurological aftereffects of meningitis — until cerebrospinal fluid testing and whole exome sequencing revealed a treatable neurotransmitter disorder. This video explains how SRD affects the brain, why newborn screening may miss it, how doctors investigate it, and why early recognition can change the course of care.
