[Partial trisomy 10p of paternal origin. 2 new cases in 2 different families].

Two unrelated patients with partial trisomy 10p due to a paternal balanced translocation are reported. Though the sizes of the trisomic segment are not identical, both patients show: severe growth retardation, important psychomotor retardation and a dysmorphic mouth recalling a "tortois mouth". These observations are compared to twelve others from the literature.