A case of Prader Willi syndrome with del 15 (q11-->q13)

Cytogenetic analysis was performed on a four-year-old girl with obesity, mental retardation, recurrent febrile convulsions and a provisional diagnosis of Prader Willi syndrome. High-resolution banding was done to observe the subchromosomal deletion. An interstitial deletion (q11-->q13) on one of the 15th chromosomes was observed in all metaphases.