Post-hemodialysis Retro-Odontoid Pseudotumor Without Atlantoaxial Instability or Rheumatoid Arthritis: A Case Report.

Retro-odontoid pseudotumor is commonly associated with rheumatoid arthritis and C1-C2 instability. Meningitis has not been described as an associated factor for retro-odontoid mass before. Retro-odontoid mass as a pathology could be a serious condition. In this case report, the patient had a significant neurological deficit as he had a score of grade B on the American Spinal Injury Association Impairment Scale (ASIA). To our knowledge, approaching the lesion through the anterior approach with C3 corpectomy was not described before in the literature. We are reporting this case to increase the awareness of spine surgeons about the rarity of this case and the benefits of direct decompression over indirect decompression as per our experience.