Editorial

doscopist, finding serrated lesions, especially sessile-serrated ade-nomas, is not easy. They are usually flat, pale and easily over-looked. These characteristics are quite different from those of tra-ditional serrated adenomas which are polypoid and easily de-tected on examination. Sessile-serrated adenomas are usually rec-ognized more in the ascending colon and can be easily missed during colonoscopic procedures. Other ‘de novo ’ cancers have yet to be defined. Depressed-type cancers are said to be related with ‘de novo ’ cancers. Sometimes accessories such as a hood or a cap may be helpful so as not to overlook lesions in blind spots. In short, time is the key to a com-plete colonoscopy, so relax, concentrate, and take sufficient time