GATA2 deficiency was first identified in 2011 and have been reported over 500 individuals with GATA2 mutations. The onset of symptoms ranges from early childhood to late adulthood but very often the diagnosis is made between adolescence and early adulthood. These patients can be relatively asymptomatic or have life threatening diseaseas (myelodysplastic syndrome, acute leukemia). We describe case of 30-years old women with GATA2 novel mutation who present by primary lymphedema, myelodysplastic changes in bone marrow, monocytopenia and history of several recurrent infections (bacterial, mycobacterial). The case illustrates the diagnostic difficulties in identifying GATA2 deficiencies.