Arnold-Chiari Malformation Type I Evident After a Streptococcal Throat Infection in a Young Female: A Rare Case.

Arnold-Chiari malformation (ACM) is a rare neurological developmental disorder that presents at birth. No such cases have been reported in support of microbial infections causing Chiari malformation, yet there is evidence of how microorganisms can lead to brain abscess, brain empyema, and meningoencephalitis. We present a 23-year-old young woman with progressive back and leg pain after a streptococcal throat infection, followed by a single episode of syncope. Radiographs of the spine revealed a mild reversal of cervical spine curvature and minimal levocurvature of the lumbar spine. Magnetic resonance imaging of the brain showed herniation of the cerebral tonsils into the foramen magnum, which suggested the diagnosis of ACM type I. Neurosurgery was recommended for posterior fossa decompression, but the patient was reluctant to undergo the procedure. This is a rare case of ACM symptomology that became evident only after a streptococcal throat infection in a young adult female.