title: MR appearance of the retroisthmic cleft.
authors.forename: C W
authors.initials: CW
authors.lastname: Horner
authors.forename: V M
authors.initials: VM
authors.lastname: Haughton
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D017116:Low Back Pain / Q000209:etiology*; D008159:Lumbar Vertebrae / Q000002:abnormalities* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010026:Osteosclerosis / Q000175:diagnosis; D016136:Spina Bifida Occulta / Q000175:diagnosis*; D013169:Spondylolysis / Q000175:diagnosis*