The Enigma of Periorificial Desquamating Lesions in a Child.

Biotinidase deficiency (BD) is a rare autosomal recessive, vitamin-responsive inborn error of metabolism associated with a wide spectrum of dermatological, neurological, auditory, and metabolic abnormalities. This case report reiterates that a high index of suspicion in childhood diseases with periorificial desquamation can lead to timely detection and active intervention in BD.