TY - JOUR T1 - Mosaicism for a tandem duplication dup(1)(q12q22) in an 18 year old female. JF - Journal of Medical Genetics JO - J Med Genet SP - 600 LP - 603 DO - 10.1136/jmg.35.7.600 VL - 35 IS - 7 AU - D de Silva AU - D Massie AU - J Drummond AU - D Couzin AU - J C Dean Y1 - 1998/07/01 UR - http://jmg.bmj.com/content/35/7/600.abstract N2 - The clinical features and cytogenetic results of an 18 year old mentally handicapped female found to be a mosaic for a tandem duplication of chromosome 1 (46,XX,dup(1)(q12q22)/46,XX) are reported. The case is compared with the three previously described cases and possible mechanisms for the origin of the duplication are discussed. This patient was not found to have features of Proteus syndrome which was previously reported in a subject mosaic for a tandem duplication involving chromosome (1)(q11q25). ER -