mediastinum

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

NIH: National Cancer Institute

The chest is the part of your body between your neck and your abdomen (belly). The medical term for your chest is thorax.

Your chest holds many important structures for breathing, digestion, blood circulation, and other important body functions. These structures include your:

• Ribs and breastbone
• Esophagus, the tube between your mouth and stomach
• Trachea, your windpipe
• Bronchi, the tubes that carry air from your windpipe to your lungs
• Lungs
• Pleura, a thin layer of tissue that covers the lungs and lines the inside wall of the chest space
• Heart and large blood vessels
• Thymus, a gland that's part of your immune system
• Nerves

Chest injuries and disorders are problems that affect any of the organs or structures located in your chest.

There are many types of chest injuries and disorders, for example:

• Broken ribs
• Esophagus disorders
• Swallowing disorders, also called dysphagia
• Tracheal disorders
• Bronchial disorders
• Lung diseases and collapsed lung
• Pleural disorders
• Heart diseases
• Mediastinal diseases, which are tumors, inflammation, and other problems with the structures in the mediastinum, which is the space between your lungs, breastbone, and spine
• Thoracic aortic aneurysm
• Thoracic outlet syndrome

Chest injuries may happen from the force of car accidents, falls, or sports injuries. Or the chest may be pierced by a bullet or sharp object. Because your chest holds so many important structures, certain chest injuries may be life-threatening.

Diagnosis of chest injuries or disorders depends on the type of symptoms you're having and whether you've had a chest injury. Injuries are usually obvious, but in most cases, you'll need tests to know how serious an injury is.

There are many types of tests for diagnosing different types of chest injuries and disorders, for example:

• Diagnostic imaging tests
• Heart tests
• Lung function tests
• Bronchoscopy
• Pleural fluid analysis
• Dysphagia tests
• Biopsy

Treatments will depend on the type of chest injury or disorder you have.