Photoclinic: Lesch-Nyhan Syndrome
May 1st 2006This 14-year-old boy has Lesch-Nyhan syndrome. The picture shows chronic scarring of the lip--a result of self-mutilating behavior that characterizes this syndrome. Lesch-Nyhan syndrome is also characterized by dystonia, choreoathetosis, and mental retardation--all of which are associated with hyperuricemia, write Arvind Vasudevan, MD, and Atiya Khan, MD, of Morgantown, WVa. This X-linked recessive abnormality of the long arm of the X chromosome (Xq26) causes a deficiency of hypoxanthine-guanine phosphoribosyltransferase (HGPRT) in the brain, liver, and red blood cells.1 In the United States, this condition may be as rare as 1 in 1.2 million.2 Because of the mode of transmission, this disorder affects males primarily; however, cases involving females have been reported.1 Partial variants of the syndrome involving decreased, but not entirely absent, levels of HGPRT also have been identified.2
Photoclinic: Klippel-Trenaunay-Weber Syndrome
August 1st 2005The parents of this 2-year-old boy brought their son for evaluation of swelling of the right leg and excoriation and serosanguineous discharge from the ankle region of 3 days' duration.The child had had a hemangioma of the right ankle since birth. Subsequently, there was gradual spread of the lesion along the leg to the buttocks.