There are 2 ways to determine whether nasopharyngeal cancer has bone metastasis: 1. To see whether there are related symptoms caused by bone metastasis, such as bone pain, localized lumps. More importantly, imaging examination can be done by X-ray, CT or magnetic resonance, which can detect localized bone destruction or occupying lesions in the painful areas.2. Whole body bone scan can detect bone destruction or bone tumor in hidden areas, of course, if bone metastasis is to be diagnosed conclusively, bone defects or bone destruction detected by imaging examination can be examined by puncture examination under imaging guidance. Of course, if we want to confirm the diagnosis of bone metastasis, for the bone defects or bone destruction found by imaging examination, we should carry out puncture examination under the guidance of imaging, and find the cancer cells after puncture examination.