Partial trisomies 13 and 22 due to nondisjunction of a maternal reciprocal translocation,t(13;22)(q22;q11) |
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Authors: | Osvaldo Mutchinick Lizbeth Ruz Ramón Jiménez |
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Institution: | (1) Departamento de Genética, Instituto Nacional de la Nutrición, San Fernando y Viaducto Tlalpan, México 22, D. F., Mexico |
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Abstract: | Summary A family is reported in which the propositus has an extra G-like chromosome with an unusual G-banding pattern. Cytogenetic family studies showed that the mother is a carrier of a balanced reciprocal translocation t(13;22), which does not affect the size and morphology of the chromosomes involved. The propositus has a 47,XY,+der(22),t(13;22)(q22;q11) karyotype and is therefore partially trisomic for the distal third of the long arm of chromosome 13 and for a very small part of chromosome 22. The clinical findings are presented and compared with those of other reported cases of partial trisomies 13 and 22. |
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