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Editor’s note: Chiari-like malformation is a condition that predominantly affects Cavalier King Charles Spaniels (CKCSs), in which the caudal fossa is malformed with a decreased volume, leading to cerebellar herniation through the foramen magnum and obstruction of the flow of cerebrospinal fluid. This, in turn, leads to the development of fluid-filled cavities (syrinxes) within the spinal cord – a condition termed syringomyelia (SM). The major clinical sign associated with this disease is pain and scratching, but the signs vary depending on the location of the syrinx. Although well recognised, the true prevalence of SM in the CKCS population is unknown.