RT Journal Article SR Electronic T1 Isolated Fractures of the Posterior Maxillary Sinus: CT Appearance and Proposed Mechanism JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 468 OP 470 DO 10.3174/ajnr.A2337 VO 32 IS 3 A1 J.S. Simonds A1 C.T. Whitlow A1 M.Y.M. Chen A1 D.W. Williams III YR 2011 UL http://www.ajnr.org/content/32/3/468.abstract AB A heretofore unreported type of facial fracture is discussed. Twenty-two cases of posterior maxillary wall fracture are reviewed, of which 59% demonstrated concomitant mandibular fracture. The proposed mechanism for this injury is an impact from the ipsilateral mandibular coronoid process striking the posterior maxillary wall, with associated mandibular dislocation or fracture. As such, further investigation of the mandible may be warranted when this type of maxillary wall fracture is encountered to exclude concomitant injury. GSWgunshot woundMVCmotor vehicle crashTMJtemporomandibular joint