Partial deletion of a group-F (19-20) chromosome in a physically handicapped psychiatric male patient

Trisomy of chromosome 20

A neonate with ususual facial features and multiple congenital malformations expired at 4 hours of age. An autopsy revealed severe anomalies of the gastrointestinal system and spinal dysplasia. Cytogenetic evaluation of fibroblasts cultured from a lung biopsy revealed a karyotope of 47,XX,+20.

Ring F chromosome mosaicism (46,XY,20r-46,XY) in an epileptic child without apparent haematological disease

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A ring-20 chromosome

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