Disease_Mapped_To_Chromosome Human Chromosome 17 Cellosaurus Disease Terminology Syndrome Rare Non-Neoplastic Disorder Smith-Magenis Syndrome Chromosome 17p11.2 Deletion Syndrome Smith-Magenis Syndrome Smith_Magenis_Syndrome Disease or Syndrome C75469 C0795864 A genetic syndrome caused by an interstitial deletion in chromosome 17p11.2. It is characterized by mild to moderate mental retardation, distinctive facial features (flat head, square face, and deep set-eyes), sleep disturbances, attention deficit disorders, and temper tantrums. Smith-Magenis Syndrome Cellosaurus