9q33.3q34.11 Microdeletion Syndrome, also known as deletion 9q33.3q34.11, is related to developmental and epileptic encephalopathy 4. An important gene associated with 9q33.3q34.11 Microdeletion Syndrome is LMX1B (LIM Homeobox Transcription Factor 1 Beta). Affiliated tissues include skin and bone, and related phenotypes are seizure and dysphagia