A new inherited interstitial deletion of the distal long arm of chromosome 4.

A 12-year-old boy showed mild dysmorphic features, late presentation of learning difficulties and behaviour problems, obesity, breast hypertrophy and bilateral slipped capital femoral epiphysis. His mother also has mild dysmorphic features, obesity, and a similar history of late presentation of learning difficulties and behaviour problems. Cytogenetic analysis demonstrated an inherited distal long arm deletion of one chromosome 4.