In spite of a certain degree of statistical error, these results indicate that BPS/IC is not a common occurrence in the Italian population. It is widely agreed that a disease registry is a valuable source of information both for epidemiology and for public health. Moreover, it helps estimate the diagnostic delay, one of the key research areas related to this type of diseases. In the next 2 years, it will be interesting to evaluate the prevalence pattern of BPS/IC in Italy, in view of a comparison between Italian data and other European registries.