Question: What is (are) KBG syndrome ?
Answer: KBG syndrome is a rare condition characterized mainly by skeletal abnormalities, distinctive facial features, and intellectual disability. Specific signs and symptoms may include delayed bone age; abnormalities of the bones of the spine, ribs, and/or hands; large teeth (macrodontia); short stature; developmental delay; and behavioral or emotional issues. Less common features may include hearing loss, seizures, and congenital heart defects. In some cases, KBG syndrome is caused by a mutation in the ANKRD11 gene and is inherited in an autosomal dominant manner. In other cases, the genetic cause is unclear. Some affected people inherit the condition from a parent, while in other people it occurs sporadically.
Source: GARD