What tests are done to diagnose osteosarcoma?

Written by Wang Cheng Lin

Orthopedics

Updated on March 10, 2025

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The most accurate diagnostic method for osteosarcoma is biopsy, where live tissue is extracted and sent for pathological examination. The positive rate of this method can reach over 90%. Besides biopsy, there are several other methods to examine such conditions. For example, X-rays can be taken to observe significant damage to the bone structure. Secondly, CT scans and MRI can be used to determine whether the bone tumor has infiltrated surrounding tissues. MRI can also detect if there are metastases to organs outside the lungs. The third method is radionuclide bone scanning, which primarily aims to check for distant metastases of osteosarcoma.

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Written by Na Hong Wei

Orthopedics

55sec

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Osteosarcoma bone metastasis symptoms

The symptoms of osteosarcoma metastasis, osteosarcoma most commonly metastasizes to the lungs. If pulmonary metastasis occurs, there are at least two prominent characteristics. The first is that most metastatic tumors are located on the surface of the lungs and are rarely within the lung parenchyma, thus, they are not difficult to detect. The second point is that most metastatic tumors predominantly present as multiple bilateral lung metastases. Isolated unilateral lung metastasis is very rare. Therefore, this characteristic determines that osteosarcoma lung metastasis can only be managed with local wedge-shaped or segmental lung resections as the basic comfort measure. In fact, this simple surgical approach often allows for complete removal of the metastatic tumors while preserving most of the normal lung tissue.

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Written by Na Hong Wei

Orthopedics

1min 20sec

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Can osteosarcoma be felt?

Osteosarcoma can be felt by touch, and its main clinical manifestations include persistent progressive pain, which intensifies at night. Secondly, there are local lumps, commonly located at the distal femur, proximal tibia, and proximal humerus, which are high incidence areas for osteosarcoma. In such cases, you don't even need to touch it; you can see it with the naked eye because the swelling is quite severe. Additionally, the surrounding skin may appear reddened and warm, and superficial veins may become prominently swollen, indicating that the skin over the affected area looks different from normal skin. Moreover, in the area affected by osteosarcoma, the bone may show a spindle-shaped enlargement, looking like a spindle-shaped lump, causing the joint area and the surrounding normal joints to be clearly abnormal. Therefore, in cases of obvious symptoms of osteosarcoma, not only can you see the tumor, but you can also feel it. However, patients often will not let you touch it, as touching can cause pain and even force the joint and surrounding muscles into a forced state. This forced condition helps alleviate pain in the joint and surrounding areas. Thus, osteosarcoma can indeed be felt by touch.

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Written by Guan Yu Hua

Orthopedic Surgery

1min 4sec

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Can osteosarcoma be cured?

Osteosarcoma is a malignant tumor of the bone, commonly occurring in adolescents and young adults, primarily near the proximal end of the tibia, the distal ancient end, or near the proximal end of the humerus, most frequently seen at the end of the bone shaft. In the early stages, there are no symptoms, and once detected, it is usually in the middle to late stages. An X-ray examination can be used for diagnosis, often showing a Codman's triangle or a sunburst pattern. Osteosarcoma generally needs early detection and treatment. If a primary lesion is present, surgical treatment can be pursued, including procedures such as resection with inactivation and reimplantation or limb-sparing surgery with a prosthesis. Another option is amputation, followed by extensive chemotherapy. The likelihood of osteosarcoma spreading to the lungs is very high. In recent years, with early diagnostic physical examinations and the rapid development of chemotherapy, the five-year survival rate for osteosarcoma can reach 50%.

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Written by Cheng Bin

Orthopedics

43sec

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Is osteosarcoma highly malignant?

First of all, it is certain that osteosarcoma is very malignant. Once osteosarcoma is detected, it is necessary to actively prepare for surgery, rule out surgical contraindications, and then proceed with surgical treatment. During the surgery, efforts should be made to perform an extended resection, and if necessary, amputation may be required. After the surgery, the excised specimen must be sent for pathological examination to determine the pathological type. Then, based on the examination results, effective radiotherapy and chemotherapy should be chosen to control the possibility of recurrence or metastasis of osteosarcoma and to extend the patient's life as much as possible.

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Written by Wang Cheng Lin

Orthopedics

38sec

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Osteosarcoma common onset age

Osteosarcoma most commonly occurs in adolescents under the age of 20, or in children, and is a type of malignant tumor. It is the most common malignant bone tumor in children, accounting for about 5% of all malignant tumors in children, making this age group highly susceptible to osteosarcoma. The formation of osteosarcoma is mainly due to external factors such as viral infections and genetic mutations that lead to cell mutations. Osteosarcoma is a typical malignant tumor that destroys bone and surrounding soft tissue, leading to pathological fractures. It can also form distant metastases, thus posing a significant threat.