Treatment of mediastinal tumors in Moscow

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Treatment of cancer (oncology)

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Mediastinal tumors

Mediastinal tumors are a concept that combines benign and malignant neoplasms localized in the middle (mediastinal) part of the chest between the pleural cavities. Here are the lungs and trachea, heart, aorta, many arteries, esophagus, thymus (thymus gland), and lymph nodes. Accordingly, the group includes formations from different tissues, different in etiology, degree of malignancy, preferred treatment tactics, etc.

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Malignant tumors of the mediastinum account for about 20–40% of all cases of neoplasms in this localization. In total, up to 100 types of neoplasia are found in this area, including cysts and pseudotumors - aneurysms of large vessels and conglomerates of lymph nodes. They are most often diagnosed in people aged 20–40 years; no gender dependence has been identified.

Classification and varieties

Primary tumors initially arise in this area, secondary tumors arise as a result of metastasis of tumors located in other organs. They can develop from different types of tissues: epithelial, nervous, connective, muscle, lymphatic, etc. Based on their location, they are divided into localized in the upper, middle or lower, as well as the anterior or posterior mediastinum.

Most often in connection with the mediastinal cavity they talk about thymomas - the most common type of neoplasm of the thymus gland. Also common formations of this localization include neuromas. While in adults the bulk of such neoplasias are benign, mediastinal tumors in children are often malignant. To determine their development, the traditional 4 stages for oncology are used. Some lung lesions are also classified as mediastinal cancer.

Our expert in this field:

Moiseev Alexey Andreevich

Oncologist, Ph.D.

Candidate of Medical Sciences

Experience: More than 19 years

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Publications in the media

Benign mediastinal tumors are detected more often than malignant ones (4:1). Among benign neoplasms, the most common are teratomas and neuromas, and among malignant neoplasms, tumors of lymphoid tissue are most common. In the anterior mediastinum, tumors are registered 2 times more often than in the posterior one.

Classification • Benign tumors •• Thymomas •• Teratomas •• Neurogenic tumors (neurinomas) •• Connective tissue tumors (lipomas, chondromas) •• Vascular tumors (hemangiomas) •• Bronchogenic cysts •• Pericardial cysts • Malignant tumors •• Lymphomas •• Germinomas •• Neuroblastomas.

Tumors of the anterior mediastinum • Dermoid cysts (teratomas) •• Frequency. Teratomas are more often detected in adolescents. In 80% of cases, these tumors are benign •• Etiology. Teratomas arise from the same embryonic pharyngeal pouch as the thymus gland (III–IV pairs) •• Pathological anatomy. The teratoma includes derivatives of all germ layers, including elements of ectodermal, endodermal and mesodermal origin •• Diagnosis. Teratomas are diagnosed by radiography. On photographs they appear as smooth-walled cysts or dense homogeneous shadows, often with calcified walls. A variety of structures (for example, teeth) can be found inside the tumor. These cysts are usually asymptomatic until infectious complications or malignant changes develop ••

Treatment: thoracotomy, complete removal of the tumor. • Thymomas (tumors of the thymus gland) •• Frequency. Among neoplasms of the anterosuperior mediastinum in adults, thymomas are most often detected. Thymomas can occur at any age, most often at 50–60 years of age. In 40–50% of patients, thymoma causes concomitant pseudoparalytic myasthenia gravis •• Morphology ••• Thymus tumors, by cellular nature, can be lymphoid, epithelial, spindle cell or mixed ••• 2/3 of thymomas are regarded as benign; of these, 10% are represented by simple cysts ••• With epithelial thymomas the prognosis is unfavorable, with spindle cell thymomas it is much better ••• It is easiest to distinguish a benign tumor from a malignant one by its tendency to damage adjacent tissues. Benign tumors are encapsulated. Malignant tumors are invasive, they grow into nearby organs or pleural cavities. Distant metastasis is relatively rare •• Diagnosis ••• Most patients with thymomas are asymptomatic; The tumor is discovered accidentally during a chest x-ray. The appearance of symptoms is due to invasion of a malignant tumor. Chest pain, shortness of breath, and superior vena cava syndrome occur ••• Abnormalities detected during X-ray, CT, or MRI of the chest organs help in the diagnosis; concomitant pseudoparalytic myasthenia gravis. In such circumstances, it is necessary to examine the mediastinum for the presence of a thymic tumor. The greatest help is provided by lateral radiography of the chest organs, since in the direct projection, small tumors can be hidden in the shadow of large vessels •• Surgical treatment. Most thymic tumors are removed through a median sternotomy approach (thoracotomy is possible) ••• Thymomas not accompanied by myasthenia gravis: mediastinal examination and tumor removal are necessary ••• Benign tumors are removed ••• Malignant tumors. If possible, all areas of tumor spread should be removed. When an infiltrating thymic tumor cannot be completely or partially removed, postoperative radiation therapy is resorted to. Chemotherapy and immunotherapy have no clinical benefit ••• Thymomas associated with myasthenia gravis should be removed en bloc along with the rest of the thymus.

• Connective tissue tumors •• Frequency. They occupy third place among mediastinal tumors •• Morphology. Tumors are represented by fibromas, lipomas, chondromas, myxomas •• Diagnosis. Usually patients have no complaints. Typically, such tumors are detected by x-ray. Tumors are localized in both the upper and lower parts of the anterior mediastinum. They often do not have clear boundaries, their capsule is not expressed in all parts •• Treatment is surgical •• The prognosis is favorable.

Tumors of the posterior mediastinum • Neurogenic tumors (neurinomas) •• Frequency. They occupy the second place among mediastinal tumors. Neuromas can be a manifestation of neurofibromatosis (von Recklinghausen's disease) •• Etiology. Tumors develop from the nerve elements of the sympathetic trunk, branches of the vagus nerve, meninges and intercostal nerves. Most often located in the upper mediastinum •• Morphology. Schwannomas, neurolemmomas, ganglioneuromas, neurofibromas •• Diagnosis. Most patients with neuromas have no complaints. When a tumor grows in the lumen of the spinal canal (in the form of an hourglass), neurological symptoms are possible. The diagnosis is made radiographically, using a CT scan of the chest. On photographs, tumors appear as round, clearly defined shadows located in the area of the costovertebral angle •• Treatment - thoracotomy, tumor removal ••

The prognosis is favorable. • Vascular tumors (hemangiomas, lymphangiomas) are quite rare •• Etiology. Tumors develop from elements of the wall of blood or lymphatic vessels •• Morphology. Tumors are represented by vascular formations. Quite often their malignant transformation occurs •• Diagnosis is made by x-ray and CT scanning •• Treatment is surgical. • Bronchogenic cysts are detected quite rarely, more often in women •• They develop from mixed germinal buds of the foregut or tracheal kidney •• Morphology. Thin-walled formations filled with transparent (sometimes mucous) contents. The inside of the cyst wall is lined with ciliated epithelium •• X-ray diagnosis •• Surgical treatment.

• Pericardial cysts are thin-walled formations with transparent contents that easily rupture when released. The inside of the cysts is lined with single-layer squamous or cubic epithelium and is located in the lower parts of the mediastinum. Malignant tumors of the mediastinum

• Lymphoma. In 50% of patients with lymphomas (including Hodgken's disease), the mediastinal lymph nodes are involved in the process. Of these, only 5% are affected exclusively by the mediastinum •• Symptoms: cough, chest pain, fever and weight loss •• Diagnosis is confirmed by radiography and lymph node biopsy. The latter is performed with mediastinoscopy, anterior mediastinotomy or thoracoscopy •• Surgical treatment is not indicated. Patients are subject to combined chemotherapy and radiation therapy.

• Germinomas are tumors arising from embryonic germs that normally differentiate into sperm and eggs. These neoplasms account for less than 1% of all mediastinal tumors. Their metastases are recorded in the lymph nodes, pleura, liver, bones and retroperitoneum •• Histological types ••• Seminoma ••• Embryonic cell sarcoma ••• Teratocarcinoma ••• Choriocarcinoma ••• Endodermal sinus tumor •• Symptoms: chest pain, cough and hoarseness due to damage to the recurrent laryngeal nerve •• Diagnosis. Various methods of radiation diagnostics are used (radiography, MRI, CT of the chest organs) •• Surgical treatment . If possible, complete removal of the tumor •• Adjuvant therapy. Seminomas are very sensitive to radiation. For other cell types, chemotherapy gives good results.

ICD-10 • C38 Malignant neoplasm of the heart, mediastinum and pleura • C78.1 Secondary malignant neoplasm of the mediastinum • D15.2 Benign neoplasm of the mediastinum

Mediastinal tumors: symptoms and diagnosis

At the beginning of the development of a neoplasm, symptoms may be absent; in such cases, the disease is sometimes detected by fluorography. As they grow, they appear:

pain in the chest, which can radiate to the shoulder girdle, neck, and area between the shoulder blades;
painful sensations in the joints;
arrhythmia, heart rhythm disturbances, including bradycardia or tachycardia;
cough, shortness of breath;
asthenia, fatigue;
redness and sagging of the face;
headaches and dizziness;
specific signs that appear with specific types of tumors - night sweats, itching, low blood sugar, hypertension, thyrotoxicosis, muscle weakness, etc.

To establish a diagnosis, radiography, CT, MRI, and endoscopy are performed. The most accurate way to determine the nature of formations is a biopsy - taking biomaterial for histological and cytological studies.

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Treatment

The patient's treatment tactics directly depend on the stage at which the diagnosis was established and confirmed. If the tumor is detected early, has clear boundaries and does not spread beyond the organ, then radiosurgery using the CyberKnife system is increasingly becoming a method of radical treatment all over the world. In later stages, surgical treatment is indicated for the patient. With a significant volume, the tumor becomes inoperable and treatment is reduced to chemotherapy and radiation therapy aimed at slowing the growth of tumor cells and metastases.

Whether surgery is indicated for the patient, what the extent of surgical intervention will be, whether chemotherapy and/or radiation therapy will be performed - this is decided by an interdisciplinary council of doctors.

The most effective method for treating small tumors, including lung cancer, is radiosurgery. For the treatment of tumor tumors (both benign and malignant), as well as single and multiple metastases, the high-precision robotic system CyberKnife is used. CyberKnife allows you to remove lung tumors, regardless of their size, location, or depth of germination in the lung tissue.

Other methods of treating lung cancer that can be included in complex therapy depending on the type of cancer are: surgery, high-precision radiation therapy and chemotherapy treatment, including targeted therapy, immunotherapy, hormonal therapy, etc.

Radiation treatment of lung cancer, which, as a rule, is used to a greater extent to alleviate the progression of cancer and relieve symptoms, is provided by a modern linear accelerator with IMRT function (intensity modulated radiation dose delivery) Elekta Synergy Platform. The use of this equipment makes it possible to deliver high doses of ionizing radiation directly to the boundaries of pathological neoplasms, while healthy tissue around the tumors remains maximally protected.

Chemotherapy treatment of cancer, which, along with the use of radiosurgery on CyberKnife, is the main method of treating lung tumors, makes it possible to stop the spread of metastases.

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2 local ward

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a guest room
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Anti-decubitus mattresses

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Diagnostics

In order to make a diagnosis, the patient is referred for a chest x-ray, esophagus with contrast and computed tomography. The examination allows you to determine the exact location of mediastinal cancer, the extent of the process, and damage to other organs of the chest cavity - lungs, diaphragm, aorta, chest wall. MRI makes it possible to find out the condition of the soft tissues in the area of the tumor, as well as to identify tumor metastases in the lymph nodes and lungs.

The main cause of lung cancer is smoking. About 80% of patients with this pathology are smokers.