title: Superior Patellar Dislocation Misdiagnosed as Patellar Tendon Rupture: The Value of Ultrasonography.
abstract: Superior dislocation of the patella with intact patellar tendon is a rare condition. Most cases in literatures were diagnosed by clinical examination and plain radiography; however there are many cases that were misdiagnosed as patellar tendon rupture. In this case, we demonstrate the use of ultrasound for diagnosis of superior dislocation of the patella in the emergency department. We also include a literature review of similar cases and discuss the advantages of different types of imaging for diagnosis in this condition.
authors.affiliation: Department of Orthopedics, Faculty of Medicine, Khon Kaen University, 123 Mittraphap Road, Khon Kaen 40002, Thailand.
authors.forename: Artit
authors.identifier: 0000-0001-9014-243X
authors.initials: A
authors.lastname: Boonrod
authors.affiliation: Department of Orthopedics, Faculty of Medicine, Khon Kaen University, 123 Mittraphap Road, Khon Kaen 40002, Thailand.
authors.forename: Sermsak
authors.initials: S
authors.lastname: Sumanont
authors.affiliation: Department of Orthopedics, Faculty of Medicine, Khon Kaen University, 123 Mittraphap Road, Khon Kaen 40002, Thailand.
authors.forename: Manusak
authors.initials: M
authors.lastname: Boonard
authors.affiliation: Department of Radiology, Faculty of Medicine, Khon Kaen University, 123 Mittraphap Road, Khon Kaen 40002, Thailand.
authors.forename: Arunnit
authors.initials: A
authors.lastname: Boonrod