The aetiological relationship between congenital torticollis and obstetrical paralysis.

A statistical study was done to determine the incidence of congenital torticollis. The aetiological relationship between torticollis and obstetrical paralysis was analysed in an attempt to clarify the possible cause of torticollis. There were forty-three cases of torticollis in the 2,160 babies delivered at the Otsu Red Cross Hospital from 1978 to 1981. The overall incidence of torticollis was 1.9%; 1.2% in cephalic presentations, 6.5% in double breech presentations, 4.2% in footling presentations and 34.0% in single (frank) breech presentations. In addition, forty-three cases of obstetrical paralysis treated in Kyoto University Hospital from 1961 to 1981 were reviewed. Torticollis was found in 26% of the cephalic presentations (6 out of 23) and in 80% of the breech presentations (16 out of 20) respectively. These findings suggest that a foetal posture with both the knees and the cervical spine extended seems to be closely related to the development of torticollis, which indicates that a direct cause may be stretching of the sternocleidomastoid muscle during delivery.