OBJECTIVE: To present two cases in which patients with Type I Arnold-Chiari malformation (ACM) were treated with adjustments to the cervical spine for conditions unrelated to the anomaly.
CLINICAL FEATURES: The ACM is an anomaly of central nervous system development in which structures from the posterior fossa descend below the level of the foramen magnum.
INTERVENTION AND OUTCOME: The patients reported were adjusted multiple times to the cervical spine. No ill effects or complications were noted related to the ACM.
CONCLUSIONS: Asymptomatic Type I ACM is not necessarily a contraindication to skilled adjustments to the cervical spine.
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