One patient was held by US immigration officials for four hours before they allowed him to enter the country.
The case is highlighted in the journal Annals of Oncology.
a 62-year-old man, had head and neck cancer that had spread, but which had responded well to chemotherapy.
He was prescribed capecitabine to help prevent the cancer coming back.
Although the drug is commonly used to treat a range of cancers, it can cause chronic inflammation of the palms or soles of the feet, leading to peeling, bleeding or blistering of the skin.
Foreign visitors have been asked to provide fingerprints at USA airports for several years.
CAPECITABINE
Used to treat a range of cancers, including breast and bowel
One of a group of drugs known as the anti-metabolites
These stop cells making and repairing DNA
Cancer cells need to make and repair DNA in order to grow and multiply
The images are matched with millions of visa holders to detect whether the new visa applicant has a visa under a different name
Martin Ledwick, of the charity Cancer Research UK, said: "In a minority of cases, some chemotherapy drugs can cause hand and foot syndrome, where the skin can begin to peel on the palms of the hands and soles of the feet. BBC
ps
mora man diay kini ug haas, kanang maglonoh!
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