PT - JOURNAL ARTICLE AU - J J M Engelen AU - C E M de Die-Smulders AU - J M J Sijstermans AU - L E C Meers AU - J C M Albrechts AU - A J H Hamers TI - Familial partial trisomy 8p without dysmorphic features and only mild mental retardation AID - 10.1136/jmg.32.10.792 DP - 1995 Oct 01 TA - Journal of Medical Genetics PG - 792--795 VI - 32 IP - 10 4099 - http://jmg.bmj.com/content/32/10/792.short 4100 - http://jmg.bmj.com/content/32/10/792.full SO - J Med Genet1995 Oct 01; 32 AB - We report on a mother and her two sons who had a direct duplication of chromosome region 8p22-8p23.1 without dysmorphic features and only mild mental retardation. The patients have been studied using G banding, chromosome painting, and FISH using cosmid probes specific for the region 8p23.1-8pter. Comparison of the phenotypes of our patients and of published patients with an inversion duplication of the short arm of chromosome 8 indicates that trisomy for chromosome band 8p21 causes the more severe clinical picture in the latter.