People should get regular medical check-ups even if they feel they are in good shape, doctors said in a press conference held following the detection of several kidney tumors in healthy persons who had physical examinations. It is not unusual for people with tumors to feel fit and strong, said Chen Kuo- chiang, a urologist at Cathay General Hospital (CGH) , citing the case of a 56 -year-old male who had a tumor weighing 1.3 kg yet showed no signs of abnormality before undergoing the check-up. If not removed, it is likely that the man would have suffered from a stroke in the near future, said Chen, referring to the 24cm x 15cm x 14 cm tumor that was pressing against his internal organs and blood vessels. 'I want to stand up and call on people to go for health checks, ' said the patient, Hung Chiang-kun, who is slowly recovering from surgery. Hung's boss had suggested that he to go for a thorough physical examination and would pay for half of the cost. 'He thought I had dropped a few pounds, but I was energetic and felt well, ' said Hung, who added that he is glad he listened to his employer's advice. Lin Shing-huey, chief of family medicine at CGH, said that a lot of companies work with hospitals to provide annual health checks for their employees. 'Some businesses even cover the whole cost, ' said Lin, urging everyone to take the opportunity to look after themselves. According to Lin, many health problems can be detected through health examinations, including cardiovascular disease, high blood pressure, diabetes, high cholesterol levels and cancer. 'We should keep in mind that some of these are among the top 10 causes of death in Taiwan.' 