APA Dictionary of Psychology

a rare genetic disorder characterized by microcephaly, severe intellectual developmental disorder, obesity, seizures, hypogonadism, and distinct facial features. Fully expressed primarily in males, it is caused by an X-linked recessive trait mutation in the PHF6 gene. [Mats Gunnar Börjeson (1922–  ), Hans Axel Forssman (1912–1994), and J. O. Orla Lehmann (1927–  ), Swedish physicians]