Dystonia in the black and Puerto Rican population.
Dystonia among Black and Puerto Rican patients has been reported  to be a rare occurrence. Two such patients have been presented. An attempt was made to discover other cases by utilizing a mail survey. This has documented the rarity of dystonia in those ethnic groups.
D000293:Adolescent; D044383:Black People; D002648:Child; D004422:Dystonia Musculorum Deformans / Q000453:epidemiology* / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009519:New York City; D011647:Puerto Rico / Q000208:ethnology; D001741:Black or African American