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Stopping smoking lowers risk at any age — and a persistent cough needs assessment.
Also known as: lung cancer · bronchial carcinoma
Open in the tool — with search and all the links →This compilation is for information and replaces neither medical diagnosis nor treatment. If you have symptoms, see a doctor.
Smoking is by far the main risk factor, but not the only one — indoor radon, fine particulates and occupational asbestos exposure also matter, and some patients never smoked. Warning signs: a cough lasting weeks or a changed smoker’s cough, blood in sputum, breathlessness, chest pain, hoarseness, weight loss. Because the lung itself is not pain-sensitive, it is often noticed late. Assessed by imaging and biopsy.
The treatment plan is not made by one person alone but in a round of surgery, oncology, radiology, pathology and radiotherapy. You may ask what was discussed there and which alternatives came up.
Before a big decision it is planned for in many clinics, and the records belong to you. It costs one to two weeks — acceptable in almost every course, and one asks about that if it is urgent.
It is today part of the treatment and not its opposite: it lessens the exhaustion, keeps muscle and bone and improves how the treatment is tolerated. Begin with guidance, less on bad days, but not nothing at all.
Unintended weight loss worsens how any treatment is tolerated. Restrictive diets do more harm than good here — with loss of appetite, dietary advice helps early, not only once kilos are already gone.
By the clock rather than as needed works better and needs less overall. Fear of dependence is the wrong adviser in this situation — untreated pain costs sleep, appetite and strength.
Psycho-oncological support, social advice for insurance and work, and the question of who takes on what at home. This is no emergency measure but belongs at the start — and the relatives belong in it.
Targeted tablets work only if the matching change has been found in the tumour — in about a quarter of non-small-cell forms. Then they often work quickly and for one to three years, until the tumour finds a way around. Immunotherapy works for a very long time in some people and not at all in others; that can only roughly be estimated in advance. What changes the outlook most is when it is found — and stopping smoking, even after the diagnosis.
About eight to nine out of ten cases are linked to smoking; the risk falls markedly over ten to fifteen years after stopping, without ever reaching the level of non-smokers. A nodule under eight millimetres is usually only followed up, because the likelihood is low; the doubling time of a tumour ranges from a month to over a year. In screening with low-dose CT in heavy smokers, mortality falls by about twenty per cent.
In smokers a cough is familiar — so the change is what counts here: a different sound, more bouts, longer than three to four weeks, or a new cough in someone who does not usually cough.
Even small, one-off traces belong investigated. More often they come from the nose and throat or from bronchitis — the examination tells them apart in one appointment.
Breathlessness at efforts that used to work, a stabbing pain on deep breathing, or repeated pneumonias in the same place.
Hoarseness for more than three weeks without a cold, swollen nodes above the collarbone, a drooping eyelid or a swollen face with bulging neck veins.
A low sodium without another explanation can come from a hormonal effect of the tumour at a distance. It causes confusion, unsteadiness and falls.
A raised calcium is among the distant effects and among the signs of involvement of the bones. It is treatable and often relieves quickly.
The anaemia of long inflammation explains a good share of the exhaustion and is treatable, independent of the course of the underlying illness.
A rise directs the view to bone or liver. It does not replace imaging but places new pain.
The loss of muscle mass helps decide how well a treatment is tolerated. Enough protein spread across the day, together with movement, is the part one holds oneself.
Low levels are common in chronic airway illnesses and go along with more infections. Correcting a deficiency is simple; for lung function itself it is no replacement for treatment.
Relaxes the smooth muscle of the airways — which is why it is also given as an infusion in an emergency. For everyday use the tablet replaces no inhaler.
Belong in the workup of an anaemia that is otherwise too quickly put down to the illness or the treatment. Both are easy to measure and easy to supplement.
Drinking enough keeps the mucus thin and easier to cough up. That is the simplest and most often overlooked lever with sticky sputum.
The best-known counter-example to the assumption “vitamin from the fruit, therefore harmless in the capsule”. In two large trials in smokers and asbestos workers — ATBC with 20 mg and CARET with 30 mg daily over years — lung cancer occurred more often in the beta-carotene arm, not less. CARET was stopped early because of it. Beta-carotene from carrots and squash was never conspicuous; this is about the isolated high dose over a long time.
With little time outdoors and treatment running, the level often falls. Measured and replaced by finding it holds bone and muscle strength; that the illness itself responds is not shown.
Weight loss is here one of the strongest influences on how well a treatment is tolerated. In oncology 1.2–1.5 g of protein per kilogram of body weight a day is the figure worked with — with little appetite a shake is often the easier route there than a plate.
Two sides: as a mucus loosener in use for decades and well tolerated — as a high-dose antioxidant during radiation or chemotherapy contested, because some of these treatments work precisely through oxidative stress. The timing is the point, not the substance.
Effective when deficient; effects on sleep and stress plausible but moderate. Too much causes loose stool.
Clearly worthwhile and well supported when deficient — vegan, older adults, certain drugs. No energy boost without a deficiency.
Some lung tumours make hormones themselves. With small-cell carcinoma it is often ADH — the body then holds water back, and the sodium in the blood falls. Confusion with no other reason can come from that.
More rarely the tumour makes ACTH, and a Cushing picture arises within weeks instead of years: muscle weakness, high blood pressure, very low potassium. The fast course is the hallmark here.
High calcium with cancer usually comes not from the parathyroid but from a tumour messenger that acts like parathyroid hormone. Nausea, thirst and confusion are the signs — it is treatable and urgent.
Two large trials had to be stopped: high-dose beta-carotene increased the number of cases in smokers. Taken through vegetables this does not apply — one of the clearest cases where supplement and food are not the same.
Weight loss is common and worsens tolerance. 1.2–1.5 g protein per kg a day, several small meals and energy-rich snacks is the usual frame.
The claim usually rests on the PET scan: weakly radioactive glucose is injected, and the tumour lights up. That shows tumour cells take up sugar faster than the tissue next to them — not that eaten sugar feeds them. You come to a PET scan fasting, and the tumour lights up anyway; the body keeps blood sugar within narrow limits by itself. It cannot be starved out this way. There is an established link nonetheless, but it runs through body fat: in 2016 the International Agency for Research on Cancer (IARC) reviewed the available studies and found sufficient evidence, for thirteen cancers, that absence of excess weight lowers the risk. That concerns prevention — it is not an answer to where an existing illness came from.
Before an operation training improves lung function and lowers complications in studies — even two to four weeks show an effect. During treatment it preserves muscle mass.