Around 18,000 cancer patients have their medical files lost every year in hospitals, according to Macmillan Cancer Support.
A poll for the charity found 11 percent of cancer patients admitted to English hospitals every year have their medical file lost by a doctor or nurse.
The charity estimates around 18,000 of the 170,000 patients admitted to hospital have their file lost, which could impact on treatment.
More top news
Five people have been rescued from a small leisure boat on the Solent, after its engine failed and it began taking in water.
A US doctor has been accused of killing a lion during an illegal hunt, a week after it emerged dentist Walter Palmer killed Cecil the lion.
Mostly dry overnight in the east, strong winds and showery rain affecting Scotland & Northern Ireland