Sunday, October 25, 2020

SYNDROME CAUSED BY LUNG CANCER..

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Some lung cancers can cause syndromes, which are groups of very specific symptoms.

Horner syndrome

Cancers of the top part of the lungs (sometimes called Pancoast tumors) sometimes can affect certain nerves to the eye and part of the face, causing a group of symptoms called Horner syndrome:

  • Drooping or weakness of one eyelid
  • A smaller pupil (dark part in the center of the eye) in the same eye
  • Reduced or absent sweating on the same side of the face
  • Pancoast tumors can also sometimes cause severe shoulder pain.

Superior vena cava syndrome

The superior vena cava (SVC) is a large vein that carries blood from the head and arms back to the heart. It passes next to the upper part of the right lung and the lymph nodes inside the chest. Tumors in this area can press on the SVC, which can cause the blood to back up in the veins. This can lead to swelling in the face, neck, arms, and upper chest (sometimes with a bluish-red skin color). It can also cause headaches, dizziness, and a change in consciousness if it affects the brain. While SVC syndrome can develop gradually over time, in some cases it can become life-threatening, and needs to be treated right away.

Paraneoplastic syndromes

Some lung cancers can make hormone-like substances that enter the bloodstream and cause problems with distant tissues and organs, even though the cancer has not spread to those tissues or organs. These problems are calledparaneoplastic syndromes. Sometimes these syndromes can be the first symptoms of lung cancer. Because the symptoms affect organs other than the lungs, patients and their doctors may suspect at first that a disease other than lung cancer is causing them.

Some of the more common paraneoplastic syndromes associated with lung cancer are:

  • SIADH (syndrome of inappropriate anti-diuretic hormone): In this condition, the cancer cells make a hormone (ADH) that causes the kidneys to retain water. This lowers salt levels in the blood. Symptoms of SIADH can include fatigue, loss of appetite, muscle weakness or cramps, nausea, vomiting, restlessness, and confusion. Without treatment, severe cases may lead to seizures and coma.
  • Cushing syndrome: In this condition, the cancer cells may make ACTH, a hormone that causes the adrenal glands to secrete cortisol. This can lead to symptoms such as weight gain, easy bruising, weakness, drowsiness, and fluid retention. Cushing syndrome can also cause high blood pressure and high blood sugar levels (or even diabetes).
  • Nervous system problems: Lung cancer can sometimes cause the body’s immune system to attack parts of the nervous system, which can lead to problems. One example is a muscle disorder called the Lambert-Eaton syndrome, in which the muscles around the hips become weak. One of the first signs may be trouble getting up from a sitting position. Later, muscles around the shoulder may become weak. A rarer problem is paraneoplastic cerebellar degeneration, which can cause loss of balance and unsteadiness in arm and leg movement, as well as trouble speaking or swallowing.
  • High blood calcium levels (hypercalcemia): This can cause frequent urination, thirst, constipation, nausea, vomiting, belly pain, weakness, fatigue, dizziness, confusion, and other nervous system problems
  • Excess growth or thickening of certain bones: This is often in the finger tips, and can be painful.
  • Blood clots
  • Excess breast growth in men (gynecomastia)

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