16 (41%) out of 39 individuals referred by physicians because of sexual anomalies showed abnormal karyotypes; the corresponding figure for those investigated due to suspected autosomal aberrations was 37 out of 104 (36%). A special survey was also conducted among 51 mentally defective children with
Mental retardation and congenital malformations associated with a ring chromosome 9
β Scribed by S. Nakajima; M. Yanagisawa; S. Kamoshita; Y. Nakagome
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 341 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0340-6717
No coin nor oath required. For personal study only.
β¦ Synopsis
A 46,XY,r(9) (p24q34) complement was observed in a 35-month-old boy with multiple congenital anomalies. The main clinical features included intrauterine growth retardation, dwarfism, microcephaly, peculiar face, undescended testes, seizures and severe psychomotor retardation. It appears that 4 reported cases of r(9) can be divided into two groups. Three of them, including the present case, share clinical features with those of cases with 9p--. On the other hand, one case showed a different combination of malformations.
π SIMILAR VOLUMES
A 46,XY,r(10) karyotype was found in lymphocytes and skin fibroblasts cultured from a 8-month-old male showing multiple malformations and severe mental retardation. A comparison of the clinical features observed in cases in which a 10 ring was identified by means of banding techniques has been also
A ring chromosome 9 is reported in a 12-year-old, moderately mentally retarded boy. As in other ring chromosome 9 patients, the clinical stigmata are nonspecific and their expressivity is mild. The finding of two normal cells of a total of 121 cells examined favors the hypothesis of a postzygotic, m
A low-birth-weight infant with malformed upper extremities and congenital heart disease was observed. Cytogenetic analysis revealed a 46,XY,r(9)(p24q34) complement.