Apparent mosaicism for del(17)(p11.2) ruled out by fluorescence in situ hybridization in a Smith-Magenis syndrome patient
- Baylor College of Medicine, Houston, TX (United States); and others
Smith-Magenis syndrome (SMS) is a multiple congenital anomalies/mental retardation syndrome typically associated with a deletion of band p11.2 of human chromosome 17. Finucane et al. reported a 14-year-old boy with mild physical and behavior manifestations of SMS. No evidence for deletion was initially evident in 20 peripheral blood lymphocytes examined at 850 band level of resolution. Examination of metaphase chromosomes of skin fibroblasts showed a deletion of 17p11.2 in 25/25 cells examined which was consistent with the patient`s clinical manifestations of SMS. Subsequent examination of 25 cells from peripheral blood cultures indicated that 11% of cells harbored a deletion at 17p11.2, thus suggesting a mosaicism for the deletion. A third study of 20 peripheral blood lymphocytes examined at 550-850 band length resolution in a different laboratory, indicated that 13 cells had no apparent deletion, 4 cells had an apparent deletion and 3 cells were questionable. 7 refs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 447094
- Journal Information:
- American Journal of Medical Genetics, Vol. 59, Issue 3; Other Information: PBD: 20 Nov 1995
- Country of Publication:
- United States
- Language:
- English
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