Acute torticollis in children due to atlanto-axial rotary fixation.

Acute, painful torticollis in a child is not uncommon. When no local changes can explain the disease, atlanto-axial rotary fixation should be considered. The position of the head is typical but the roentgenological diagnosis is difficult, and as early treatment is mandatory, it should be initiated even if the roentgenogram is "normal". We present a review of nine patients.