Definition of the Russell-Silver syndrome

Haslam et al.1 appear to accept the concept of the combined "Russell-Silver syndrome" postulated by a number of authors. I do not, and I believe that the study of craniofacial proportions allows one to differentiate three types of intrauterine drawfs (Table I).2,3 See the Table in PDF File Finally, Haslam et al.1 do not tell us what the asymmetry is in their first two patients; as an example, should unilateral ptosis or unilateral cryptorchidism qualify a patient for inclusion under the category of body asymmetry?