MONDO_0014809 (DDX41-related hematologic malignancy predisposition syndrome) is any hereditary neoplastic syndrome in which the cause of the disease is a mutation in the DDX41 gene. Also known as: DDX41 hereditary neoplastic syndrome, MPLPF, hereditary neoplastic syndrome caused by mutation in DDX41, myeloproliferative/lymphoproliferative neoplasms, familial (multiple types), susceptibility to.