Corneal arcus as the presenting sign of familial hypercholesterolemia in a young child.

A 2.6-year-old boy presented with prominent corneal arcus. This clinical sign is rarely seen at such a young age and led to the diagnosis of familial hypercholesterolemia (FH). Genetic analysis detected biallelic pathogenic sequence variants c.1069G>A and c.2034C>A in the LDLR gene. There is significant cardiovascular morbidity and mortality associated with FH, hence early diagnosis and treatment is imperative.