What is a bone tumor? All tumors that occur in bone or originate from various bone tissue components are collectively called bone tumors. There are benign and malignant bone tumors. Benign bone tumors are easily curable and have good prognosis. Malignant bone tumors are divided into primary and secondary tumors, which have rapid development, poor prognosis and high mortality. There is another category of lesions called tumor-like lesions, which are generally more limited and easily curable. The clinical and imaging manifestations of bone tumors are complex, and early diagnosis and treatment can significantly improve the treatment prognosis.