GATA2 and Erythema nodosum: Haploinsufficiency GATA2 gene causes deficiency in GATA binding protein 2, which has heterogeneous presentation including hematologic disorders (such as familial myelodysplastic syndrome/acute myeloid leukemia), immunodeficiency, secondary PAP, and dermatologic disorders (such as panniculitis and erythema nodosum) [16–19].