The general aetiology, diagnosis, and treatment of spondylolysis, a bone defect in the pars interarticularis of the vertebra, are reviewed. A retrospective study of young tennis players diagnosed ...

Other authors have similarly noted males being affected two to three times as often as females. 2, 3 The vast majority of spondylitic defects occur at L5 (85–95%), with L4 being the next most commonly ...

Saifuddin et al evaluated 69 pars defects and found that only about one third of the defects were oriented in a plane that could be reliably visualized on oblique radiographs.Yet, when detected, a ...

The basic lesion in isthmic spondylolisthesis is in the pars interarticularis. Wiltse et al [] divided this category into three subtypes: lytic, elongated, and acute fracture. The first subtype ...