Radiological sign of spondylolysis is
Spondylolysis is a defect or fracture of the pars interaicularis. On the "Scotty dog" view, it is seen as a band of radiolucency through the "neck," like a collar. Ref: Maheshwari 6e pg 224,262,284.
Napoleon's hat sign
'Scottsh dog with collar' sign
Winking owl sign
'Cap' sign
All India exam