title: Radiology case of the month. What is the cause of this patient's knee pain? Dorsal defect of the patella.
authors.affiliation: Department of Radiology, Tulane University, New Orleans, USA.
authors.forename: Harold R
authors.initials: HR
authors.lastname: Neitzschman
authors.forename: Hari
authors.initials: H
authors.lastname: Gopal
mesh_terms: D000293:Adolescent; D018771:Arthralgia / Q000175:diagnosis / Q000209:etiology*; D001175:Arthrography; D003937:Diagnosis, Differential; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D010329:Patella / Q000000981:diagnostic imaging / Q000293:injuries / Q000473:pathology