Fig. 1

Clinical features. a Echocardiogram of the patient indicating double outlet right ventricle. PA—pulmonary artery, Ao—aorta. b–d Right and left hands of the proband with TPT-PS. Note bilateral triphalangeal thumb with asymmetrical pre- and post-axial polydactyly (arrows) and skin syndactyly involving fingers IV and V. e–g Hands and feet of the proband`s mother. Note triphalangeal thumb, post-axial polydactyly with total skin syndactyly of fingers III-V as well as syndactyly of fingers IV/V on the feet