Fraud and deceit in biomedical research

History: Scientists are supposed to be moved by lofty ideals and be taught to work restlessly in pursue of the truth, but sadly fraud in biomedical research can be traced through the entire history of science. Definition: Nowadays, typology of fraud is clearly defined. Principal types of misconduct are reviewed. Consequences: It is impossible to know to what extent the damage will remain. Fraud threats public confidence in the integrity of science and may change professional attitudes and health public policies leading to serious social consequences. Evaluation of the problem: Prevalence of research fraud is unknown but in almost every country where investigation has been largely developed, at least a corroborated case of mis-conduct has been known. Policies on the scientific process may eventually contribute to fraudulent behaviour. Situation in Colombia: Colombia lacks of comprehensive policies to deal with fraud in research. How to tackle this problem: Finally, some recommendations are given to prevent, detect and deal with fraud in biomedical research.