Macrocephaly, Dysmorphic Facies, and Psychomotor Retardation, also known as mdfpmr, is related to tuberous sclerosis 1 and tuberous sclerosis 2. An important gene associated with Macrocephaly, Dysmorphic Facies, and Psychomotor Retardation is HERC1 (HECT And RLD Domain Containing E3 Ubiquitin Protein Ligase Family Member 1). Affiliated tissues include cerebellum and brain, and related phenotypes are hypotonia and hypertelorism