70 19 歲男性病人主訴下背痛。圖為本次就診之腰椎X 光攝影及電腦斷層掃描。最可能的病變部位為何？

 Pedicle

 Pars interarticularis

 Facet joint

 Lamina

B

Lumbar spondylolysis, a unilateral or bilateral stress fracture of the narrow bridge between the upper and lower pars interarticularis, is a common cause of low back pain (LBP) in adolescent athletes.