====== Dickman Transverse Ligament Injuries Classification ====== Type I Intrasubstance [[Transverse Ligament]] tear. Treat with [[C1-C2 fusion]]. Type II Bony avulsion at tubercle on C1 lateral mass. Treat with halo vest (successful in 75%) ((Dickman CA, Greene KA, Sonntag VK. Injuries involving the [[transverse atlantal ligament]]: classification and treatment guidelines based upon experience with 39 injuries. Neurosurgery. 1996 Jan;38(1):44-50. doi: 10.1097/00006123-199601000-00012. PMID: 8747950.)).