SAMHD1 and Thrombocytopenia: Thirty-seven infants (25 TREX1; two RNASEH2A; one RNASEH2B; three RNASEH2C; three SAMHD1; one ADAR; two IFIH1) presented at birth with a clinical picture mimicking a congenital infection comprising abnormal neurological signs (poor feeding, irritability, abnormal tone, abnormal movements and seizures), hepatosplenomegaly and thrombocytopenia, and other 37 (13 TREX1; one RNASEH2A; nine RNASEH2B; seven RNASEH2C; six SAMHD1; one ADAR) showed neurological features at birth without obvious systemic involvement (82).