[Disorders of morphogenesis: genua recurvata as a deformity in various pathogenetic abnormality syndromes (Larsen syndrome, Greig polysyndactylia syndrome, partial trisomy 10q, myelomeningocele)].

Following the new classification of malformation syndromes genua recurvata in four newborns with pathogenetically different genetic syndromes (Larsen syndrome, Greig-polysyndactyly-syndrome, partial trisomy 10q and myelocele) have to be classified as a result of deformation. Genua recurvata in our patients are not symptoms caused by a specific syndrome, but have to be interpreted as a sequence.