Extraosseous Ewing's tumor

Introduction to extra-osseous Ewing's tumor Extra-pubic Ewing's tumor is a tumor that is histologically similar to the bone of Ewing's tumor, which occurs in soft tissue. Because the tumor is invasive, it is not easy to perform extensive tumor resection, and it is easy to relapse after operation. In addition, lung metastasis often occurs in the early stage. Therefore, it is difficult to control the tumor simply by surgical means. This tumor is sensitive to chemotherapy and radiotherapy, and its treatment should be based on chemotherapy and radiotherapy. The etiology of extra-pubic Ewing's tumor is unclear, but certain factors such as radioactivity have been found to be susceptible to such malignancies; many genetic factors are currently thought to produce extra-Ewing's tumors. basic knowledge Sickness ratio: 0.01%-0.02% Susceptible people: more common in young adults aged 20 to 30 Mode of infection: non-infectious Complications: metastatic bone tumor

Extracranial Ewing's tumor etiology

The etiology of extra-pubic Ewing's tumor is unclear, but certain factors such as radioactivity have been found to be susceptible to such malignancies; many genetic factors are currently thought to produce extra-Ewing's tumors.

Extra-pubic Ewing's tumor prevention

No effective preventive measures, early detection, early diagnosis, early treatment.

Extramedullary Ewing's tumor complications Complications metastatic bone tumor

Extra-extraorbital Ewing's tumor produces compression and metastasis.

Extra-pubic Ewing's tumor symptoms Common symptoms Bone pain Unexplained fever Long bone swelling pain

More common in young adults, 85% in the 20 to 30 years old, the incidence rate of men and women is similar, most of the sites occur in the limbs and spinal soft tissue, tumor growth is fast, easy to relapse after resection, often early metastasis, more common in the lungs and bones, tumors Irregular nodular or lobulated, often closely adhering to adjacent tissues, soft and brittle.

Examination of extra-pubic Ewing's tumor

1. The cut surface is brown with the naked eye, which can have extensive bleeding, necrosis, unclear state, and incomplete capsule.

2. Uniform small round cells seen under the microscope, less cytoplasm, unclear boundary, tight arrangement, round nucleus, clear nuclear membrane, fine chromatin, eosinophilic small nucleoli, less mitotic figures .

Diagnosis and identification of extra-osseous Ewing's tumor

Differential diagnosis needs to be differentiated from paracortical osteosarcoma: lesions of the tumor and periosteum on the X-ray film are visible, and lesions of the cortical bone are histologically visible. Periosteal osteosarcoma: lesions of the cortical bone can be seen on the X-ray film, and there is no lesion in the medullary cavity.

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