It is avulsion fracture Can apply cast

Uts called chip fracture

On reviewing the X-ray, the lateral malleolus fracture appears undisplaced, with maintained ankle joint alignment and no obvious shift of the fracture fragments. It looks more like a hairline or minimally displaced fracture rather than a grossly displaced one. Such fractures are usually stable and commonly managed with immobilization (cast/boot) and restricted weight bearing. However, a clinical examination and repeat X-ray or stress view, if advised by an orthopedic surgeon, is important to confirm stability. Regular follow-up is recommended to ensure proper healing.