A child with<unk>  showing characteristic facial features This<unk>  is characterized by overgrowth and advanced bone age. Affected individuals have dysmorphic features, with macrodolichocephaly, downslanting palpebral fissures and a pointed chin. The facial appearance is most notable in early childhood. Affected infants and children tend to grow quickly; they are significantly taller than their siblings and peers, and have an unusually large skull and large head. Adult height is usually in the normal range, although Broc Brown has the condition and was named the world's tallest teenager. As of late 2016, he was 7'8" and still growing. Individuals with<unk>  often have intellectual impairment, and most also display autistic traits. Frequent behavioral impairments include attention deficit hyperactivity disorder (ADHD), phobias, obsessive compulsive disorder, tantrums, and impulsive behaviors (impulse control disorder). Problems with speech and language are also common. Affected individuals may often have stuttering, difficulty with sound production, or a monotone voice. Additionally, weak muscle tone (hypotonia) may delay other aspects of early development, particularly motor skills such as sitting and crawling. Other signs include scoliosis, seizures, heart or kidney defects, hearing loss, and problems with vision. Some infants with this disorder experience jaundice and poor feeding. A small number of patients with<unk>  have developed cancer, most often in childhood, but no single form of cancer has been associated with this condition. It remains uncertain whether<unk>  increases the risk of specific types of cancer. If persons with this disorder have any increased cancer risk, their risk is only slightly greater than that of the general population.
Sotos syndrome
XYY syndrome
Lelis syndrome
Bart syndrome
McGillivray syndrome
Bart–Pumphrey syndrome
Patau syndrome
Cortes Lacassie syndrome