Cancer can occur at any age, and there are certain types more common in younger men and women.
However, it is primarily a disease that affects older people, according to Cancer Research UK.
In the UK between 2012 and 2014 half of cases were diagnosed in people above 70 years.
Incidence rates generally increase with age for most cancers.
This is largely because cell DNA damage accumulates over time.
These four types of cancer are particularly prevalent in older people, according to Cancer Research UK.
In 2014, this type accounted for a quarter of the cancers in men over 75 years.
The prostate is a small gland in the pelvis – roughly the size of a satsuma.
According to the NHS, the cancer develops slowly so people may have no symptoms for years.
Signs include an increased need to urinate and feeling that your bladder has not fully emptied.
Of the cancers diagnosed in men over 75 in 2014, 16 per cent of them were lung cancer.
This was the same proportion identified in women over the age of 75.
There are usually no symptoms in the early stages, but eventually sufferers may experience a persistent cough, coughing up blood, persistent breathlessness, unexplained tiredness and weight loss, and an ache or pain when breathing or coughing.
In 2014, 14 per cent of the cancers diagnosed in women over the age of 75 were bowel cancer.
This was the same proportion as in men.
Three main symptoms of the cancer include persistent blood in the stools, a persistent change in bowel habit, and a persistent lower tummy pain.
In 2014, 21 per cent of women over 75 with cancer had breast cancer.
Symptoms include a change in size or shape of one or both breasts, a lump or swelling in either of your armpits and dimpling on the skin of your breasts.