SLC29A3 and type 1 diabetes mellitus: Interestingly, various disorders due to SLC29A3 mutations have only recently been documented, including H syndrome (MIM 612391), pigmented hypertrichosis with insulin-dependent diabetes mellitus (PHID) syndrome (MIM 612391), Faisalabad histiocytosis (FHC) (MIM 602782) and sinus histiocytosis with massive lymphadenopathy (SHML), all comprising granulomatous lesions [16], [17], [18], [19], [20], [21], [22], [23] (Figure 3C).