AIM: Several different genetic defects have been found to result in the characteristic phenotypic expression of Prader-Willi syndrome (PWS). METHODS: We performed a retrospective analysis of 67 cases of molecularly confirmed PWS diagnosed from January 1980 through July 2006 in five medical centres in Taiwan. Clinical manifestations were compared between patients with deletion and those with maternal uniparental disomy (UPD). RESULTS: Deletion was present in 56 (84%), UPD in 10 (15%), and a probable imprinting centre deletion or imprinting defect in 1 (1%). PWS with deletion was more likely than that with UPD to be characterized by hypogonadism (p < 0.001), small hands and feet (p < 0.001), and hypopigmentation (p < 0.002). Both maternal (p = 0.015) and paternal age (p = 0.021) were higher in the UPD group. No other clinical features differed significantly different between the two groups. CONCLUSION: In contrast to most Western populations with a higher incidence of UPD, this study of PWS in Taiwan shows a higher incidence of deletion. There may be subtle phenotypic differences between the UPD and deletion genotypes, but its not clear that these are important clinically.
AIM: Several different genetic defects have been found to result in the characteristic phenotypic expression of Prader-Willi syndrome (PWS). METHODS: We performed a retrospective analysis of 67 cases of molecularly confirmed PWS diagnosed from January 1980 through July 2006 in five medical centres in Taiwan. Clinical manifestations were compared between patients with deletion and those with maternal uniparental disomy (UPD). RESULTS: Deletion was present in 56 (84%), UPD in 10 (15%), and a probable imprinting centre deletion or imprinting defect in 1 (1%). PWS with deletion was more likely than that with UPD to be characterized by hypogonadism (p < 0.001), small hands and feet (p < 0.001), and hypopigmentation (p < 0.002). Both maternal (p = 0.015) and paternal age (p = 0.021) were higher in the UPD group. No other clinical features differed significantly different between the two groups. CONCLUSION: In contrast to most Western populations with a higher incidence of UPD, this study of PWS in Taiwan shows a higher incidence of deletion. There may be subtle phenotypic differences between the UPD and deletion genotypes, but its not clear that these are important clinically.
Authors: Michelle M Mitchell; Rima Woods; Lai-Har Chi; Rebecca J Schmidt; Isaac N Pessah; Paul J Kostyniak; Janine M LaSalle Journal: Environ Mol Mutagen Date: 2012-08-29 Impact factor: 3.216
Authors: G Grugni; D Giardino; A Crinò; F Malvestiti; L Ballarati; G Di Giorgio; P Marzullo Journal: J Endocrinol Invest Date: 2010-07-22 Impact factor: 4.256
Authors: Dai Yang-Li; Luo Fei-Hong; Zhang Hui-Wen; Ma Ming-Sheng; Luo Xiao-Ping; Liu Li; Wang Yi; Zhou Qing; Jiang Yong-Hui; Zou Chao-Chun Journal: Orphanet J Rare Dis Date: 2022-06-13 Impact factor: 4.303