Viral serologies (EBV, CMV, Parvovirus B19 and West-Nile) and immunological investigations (antinuclear antibodies (ANA), rheumatoid factor, antiphospholipid antibodies (APL), anti-neutrophil cytoplasmic antibodies (ANCA), anti-aquaporine 4, anti-MOG (anti-myelin-oligodendrocyte glycoprotein) were performed. This evidence concerns the gene MOG and acute promyelocytic leukemia.