The mediastinum is the area located in the middle of the chest, between the sternum and the spine. This region contains vital organs, including the heart, esophagus, and trachea. The location of a tumor in the mediastinum often depends on the patient's age.

Children commonly develop these tumors in the posterior mediastinum, which are mostly benign. In contrast, adults often find these tumors in the anterior mediastinum, primarily being cancerous. Tumors forming directly in the mediastinum are called primary tumors. A mediastinal tumor that develops due to cancer spreading from another part of the body is referred to as metastatic.

There are many types of mediastinal tumors, and their causes depend on where they form within the mediastinum.

Causes of mediastinal tumors vary by location:

In the anterior mediastinum: Some causes include Hodgkin disease and non-Hodgkin lymphoma, thymoma and thymic cysts, and mediastinal thyroid tumors.

In the middle mediastinum: At this location, tumors may result from causes such as bronchial cysts (a benign tumor originating from the respiratory system), mediastinal lymphadenopathy (enlarged lymph nodes). Pericardial cysts, thyroid tumors, vascular complications, and tracheal tumors can also promote tumor formation in the middle mediastinum.

In the posterior mediastinum: Tumors here can be caused by extramedullary hematopoiesis, enlarged lymph nodes, and neuroenteric cysts.

Typical symptoms of a mediastinal tumor include coughing, shortness of breath, chest pain, chills, night sweats, coughing up blood, unexplained weight loss, enlarged lymph nodes, airway obstruction, and hoarseness. If a mediastinal tumor is suspected, doctors may order appropriate imaging tests, including chest X-rays, chest CT scans, and chest magnetic resonance imaging (MRI). Mediastinoscopy with biopsy may also be used when necessary.

Both benign and malignant mediastinal tumors require treatment. Untreated benign tumors can grow and compress surrounding organs and tissues, affecting their function. Treatment methods depend on the tumor's location and may include surgery, chemotherapy, or radiation therapy to destroy cancer cells.

Anh Chi (Source: Healthline)