Biomedical subjects
Publications and source records attributed to Z Docherty.
A 13 year old male with mild mental retardation, obesity, and poor secondary sexual differentiation was found to have a 46,X,+,mar karyotype. In situ hybridisation with X and Y specific probes proved the marker to be composed of Y centromeric and short arm material.
X-linked lymphoproliferative disease (XLP) is triggered by Epstein-Barr virus. This virus is also associated with Burkitt lymphoma, a tumor that carries specific chromosome translocations. No such chromosome translocations have been observed in an analysis of XLP-derived cell lines. One XLP patient was found also to have Klinefelter syndrome, having inherited two copies of his maternal XLP-carrying X chromosome.
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A variant chromosome 4 with a large G positive heterochromatic block is described and discussed in relation to chromosome 4 heteromorphisms observed with other banding techniques. The extra heterochromatin is C positive and fluoresces brilliantly with Q banding, but differs from Yqh with some methods of staining.
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