A Turkish girl with H syndrome: stunted growth and development of autoimmune insulin dependent diabetes mellitus in the 6th year of diagnosis.

Background H syndrome ([OMIM] 602782) is an autosomal recessive disorder with systemic manifestations and characteristic skin lesions, caused by mutations of the SLC29A3 gene. Short stature and diabetes mellitus are the major endocrine problems related to H syndrome, however, clear data from clinical follow-up of H syndrome patients is lacking in the literature. Case presentation Here, we present follow-up of a Turkish girl diagnosed with H syndrome at the age of 10 with a homozygous 310(c.933T>A, p.C310X) early stop codon mutation on exon 6 of the SLC29A3 gene. She had severe short stature non-responsive to growth hormone (GH) treatment and gluten-free diet despite low GH levels and celiac antibody positivity. She developed insulin dependent diabetes mellitus (IDDM) symptoms 6 years after the initial diagnosis. Conclusions H syndrome patients can develop IDDM years after characteristic symptoms. Short stature in H syndrome patients may not respond to GH replacement or gluten-free diet alone.