Survey of congenital anomalies associated with cleft lip and/or palate in 701,181 Japanese people

There have been many reports on congenital anomalies associated with cleft lip and/or palate (CU/CLP) in Japan. However, these reports included data o nly on patients who came to hospitals; thus the real situation regarding th ese anomalies remains unclear. Therefore, we surveyed newborns at all deliv ery facilities in the central area of Japan for the presence of these anoma lies, following their progress for 12 consecutive years; at the end of that time, questionnaires were collected and analyzed. In this article, we desc ribe our results.