burden of gastrointestinal cancers and problem of the incomplete information; how to make up the data?

cancer registration is an important source for measuring the burden of cancer in a population. in practice, however, quite frequently incorrect patients are registered or data items can be inaccurately recorded or not recorded at all. also the process or quality of these registrations varies among countries. in this paper, we briefly discussed some statistical techniques including; mortality and incidence analysis model (miamod), prevalence and incidence analysis model (piamod), bayesian inference and capture-recapture methods, which provide tools to re-correct the incomplete or misclassified cancer statistics with regards to gastrointestinal cancers.