Though rare, it is a slight possibility that fingerprints might vanish through the use of the cancer drug capecitabine, which is also known as Xeloda. This was first discovered when a Singapore man was detained when entering the . because of his lack of fingerprints — all because he was using the drug. Several other cancer patients had reported the loss of fingerprints individually, according to Dr. Eng-Huat Tan , a senior consultant in medical oncology at the National Cancer Centre in Singapore, who studied the drug’s effects. Capecitabine can cause a side effect known as hand-foot syndrome, which involves chronic inflammation of palms or soles, leading to the peeling of skin off these surfaces, and ultimately develop ulcers or blister — and lose fingerprints.