2024-11-0920190334-018X10.1515/jpem-2018-03802-s2.0-85058267142http://dx.doi.org/10.1515/jpem-2018-0380https://hdl.handle.net/20.500.14288/8769Background: H syndrome ([0MIM] 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.EndocrinologyMetabolismPediatricsJournal Article2191-02514553932000146448