The clinical findings and symptoms are associated with the volume loss of the posterior fossa along with the compressed and dysfunctioning structures as a result of the impending tonsils. The findings can be classified in five main groups as suboccipital headache, ocular disturbance, auditory disturbance, clinical symptoms related to the brain stem, and spinal disturbances. Pediatric CM1 patients differ from adults especially with other congenital musculoskeletal anomalies, scoliosis concomitant to syringomyelia and the existence of nasopharyngeal control disturbances.

Other discussion points about CM1 are patients without any symptoms and incidentally diagnosed patients. Approximately 80% of pediatric neurosurgeons report that incidentally diagnosed pediatric patients that have no symptoms, generally do not become symptomatic during their follow-up. Neurosurgeons have chosen to monitor these patients instead of operating on them until the emergence of neurological findings.

The best approach for the patients without any symptoms is thought to be periodic neurological examinations and MR imaging to check possible syringomyelia formation. Anahtar Kelimeler : Chiari, Tonsillar herniation, Syringomyelia