Stress fractures of the pars interarticularis.
D000293:Adolescent; D000328:Adult; D001416:Back Pain / Q000209:etiology; D005260:Female; D005598:Fractures, Spontaneous / Q000000981:diagnostic imaging / Q000209:etiology; D005599:Fractures, Ununited / Q000209:etiology; D006801:Humans; D008297:Male; D011859:Radiography; D013124:Spinal Injuries / Q000000981:diagnostic imaging