Torticollis caused by an infratentorial tumour: three cases.

Three cases with torticollis caused by an infratentorial tumour are presented. A father and his son both had a Lindau tumour, and another patient had an ependymoma. It is stressed that torticollis may be the predominant or only sign of an infratentorial tumour, and that torticollis should always be suspected to have an organic origin.