8 things you probably didn’t know about lung cancer
As a new study flags up the more common signs of lung cancer, experts outline some of the lesser-known facts about this common killer.
Having a persistent cough and shortness of breath are increasingly common first signs of lung cancer, according to a new study. But did you know that your face, voice and even fingers could show signs of the disease too?
The Cancer Research UK-funded study by researchers at the University of Exeter also found a decrease in patients who reported their first symptom to be coughing up blood, or loss of appetite, which are generally regarded as the headline symptoms of lung cancer.
Lung cancer is the most common cancer in men and the third most common in women worldwide.
Sam Janes, a professor of respiratory medicine at University College London and medical adviser to the British Lung Foundation, says: “Lung Cancer sadly often presents late when it has spread around the body, usually making cure impossible. By far the commonest symptoms are cough or a change in cough, feeling short of breath, weight loss and blood in the sputum. However this can also occur in other lung diseases, making diagnosis difficult.
“Clubbing (changes in fingernail shape) and swelling of the neck and face are pretty rare symptoms, and importantly there can also be other less worrying conditions that cause these signs.”
Here are some things you may not know about the disease.
1. There are no early symptoms
There are usually no signs or symptoms in the early stages of lung cancer, the NHS say. Symptoms of the disease develop as the condition progresses.
2. It can cause finger clubbing
Cancer Research UK (CRUK) says finger clubbing – when the tips of the fingers change shape – affects 35% of people with non small cell lung cancer.
Firstly, the nail bed becomes soft and you might notice the skin next to it becoming shiny. Next, the nail will curve more than normal – also known as Scarmouth’s sign – before the ends of the fingers get rounder and larger.
The CRUK website explains that it’s thought it be fluid collecting because more blood is flowing to the ends of the figures than usual. No one knows fully why this happens but it could be down to the tumour producing particular chemicals or hormones. If you have finger clubbing speak to your doctor who should send you for a chest X-ray.
3. There can be extra bone growth
In the later stages of finger clubbing, extra areas of bone might form on the finger joints, wrists and ankles. There may also be pain and swelling in the joints. This is sometimes mistaken for arthritis, says CRUK, and is called hypertrophic pulmonary osteoarthropathy (HPOA).
4. A hoarse voice might be a sign
The British Lung Foundation says a hoarse voice can be a sign of lung cancer. This symptom may be caused by tumours pressing on the laryngeal nerve in the chest. If this nerve is squashed, one of the vocal cords in the throat can become paralysed, leading to hoarseness.
5. Facial swelling can happen
Swelling of the face or neck may be caused by the blockage of a main blood vessel (superior vena cava obstruction). CRUK says this can be due to the lung tumour pressing on it.
6. Shoulder pain can be a symptom of a rare type
Severe shoulder pain, or pain that travels down the arm, is the most common symptom of a rare type of lung cancer that grows at the very top of the lung called a pancoast tumour.
These types of lung tumours, says CRUK, can also cause a collection of symptoms called Horner’s syndrome which include drooping or weakness of one eyelid and a small pupil in the same eye, and loss of sweating on one side of the face. These symptoms are caused by the tumour pressing on or damaging a nerve that runs from the neck to the side of the face.
7. There are some symptoms that can throw you off
CRUK says some types of lung cancer cells produce hormones that go into the bloodstream and can cause symptoms that don’t seem related to the lung cancer. Such symptoms are called paraneoplastic syndrome and can include pins and needles or numbness in the fingers or toes, and muscle weakness. There may also be drowsiness, weakness, dizziness and confusion, breast swelling in men, and blood clots.
8. You don’t have to be a smoker
Although the majority of people who get lung cancer are smokers or have smoked in the past, research from the Royal Society of Medicine has found one in six people dying of lung cancer are non-smokers.
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