Ossification of the cervical ligamentum flavum

Ossification of the ligamentum flavum (OLF) typically occurs in adults involving the thoracolumbar spine. It is less frequently encountered in the cervical region (<1%) ^{1) 2)}. In 1962, Koizumi described cervical OLF at autopsy in a 55-year-old male who had developed progressive quadriparesis ³⁾. Since then only 68 more cases of cervical OLF have been published, typically involving the East Asian populations presenting varying degrees of myelopathy.