CD40LG and non-autoimmune hemolytic anemia: Among uncommon complications after transplant, two immune‐related events were recorded in two patients: one haemolytic anaemia successfully treated with steroids at 15 months after alloSCT occurring in a patient with concomitant cGvHD, and one anti‐GM2‐ganglioside immunoglobulin M (IgM)‐positive acute demyelinating polyneuropathy diagnosed 10 months after alloSCT, successfully managed with intravenous immunoglobulins with complete neurological recovery.