title: Pseudonotch of the atlas vertebra simulating fracture with computed tomographic diagnosis. A case report.
abstract: Pseudonotch of the atlas represents a normal variation of the atlas related to a notched protuberance of the medial surface of its lateral masses. A case is presented in which cervical spine roentgenography revealed a prominent pseudonotch that mimicked a fracture of the lateral masses of the atlas. Minimal rotation of C-1 on C-2 was present without apophyseal joint subluxation. Computed tomography imaging provided an accurate diagnosis.
authors.affiliation: Department of Diagnostic Radiology, McGill University, Montreal, Quebec.
authors.forename: P
authors.initials: P
authors.lastname: Lander
authors.forename: D
authors.initials: D
authors.lastname: Gardner
authors.forename: A
authors.initials: A
authors.lastname: Hadjipavlou
mesh_terms: D000328:Adult; D001270:Cervical Atlas / Q000000981:diagnostic imaging* / Q000293:injuries*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D016103:Spinal Fractures / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed