Intellectual Developmental Disorder, X-Linked, Syndromic, Snijders Blok Type, also known as mrxssb, is related to lung cancer and leukemia, acute myeloid. An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic, Snijders Blok Type is DDX3X (DEAD-Box Helicase 3 X-Linked). Affiliated tissues include brain and skin, and related phenotypes are dyskinesia and aggressive behavior