Hereditary sensory autonomic neuropathy Type VIII: A rare clinical presentation, genomics, diagnosis, and management in an infant.

A 7-month-old female child born to nonconsanguineous parents with a history of global developmental delay, since early infancy had reported to the department with facial features of mild dysmorphism. History of finger sucking and finger biting was evident, as there was a massive scab tissue over the dorsal aspect of the index finger, above the finger nail bed. A huge ulcer was evident on the right side of the dorsal aspect of anterior two-thirds of the tongue. Genetic evaluation through targeted gene sequencing confirmed the diagnosis as hereditary sensory, autonomic neuropathy Type VIII (Online Mendelian Inheritance in Man - 616488). A homozygous missense variation in exon 3 of PRDM12 was detected. A multidisciplinary approach was planned for the management of the child. A soft splint on the maxilla was fabricated and stabilized with an adhesive. However, the final diagnosis was confirmed by a DNA genomic sequencing test, namely a multigene panel testing or comprehensive genomic sequencing.