SLC29A3 and Lymphadenopathy: Currently, however, OMIM(3) does not mention our 2010 report of OC‐poor OPT in DSS(4) and considers the two patients examples of “H syndrome” or “histiocytosis‐lymphadenopathy plus syndrome” (602782), which features biallelic SLC29A3 mutation causing short stature (but not fracturing), histiocytosis, and lymphadenopathy with or without cutaneous, cardiac, and/or endocrine features (insulin‐dependent diabetes mellitus, hypogonadism), joint contractures, and/or deafness.