An Atypical Presentation of Alagille Syndrome

Alagille syndrome is a multisystem disorder classically involving the liver, heart, vertebrae, facial features, and the eyes. In this case report, we document a case of Alagille syndrome with an atypical clinical and histopathologic presentation and subsequent identification of a novel JAG1 missense mutation. This case highlights that there may be both atypical clinical and pathologic findings in mutation-proven Alagille syndrome and that the diagnosis of Alagille syndrome should be considered in cases of ongoing bile duct damage in the setting of early-onset jaundice, cholestasis, hepatosplenomegaly, posterior embryotoxon in the eyes, and butterfly vertebrae.