| [ Summary ] |
For accurate endoscopic diagnosis of colorectal submucosal cancer, it is important to observe the pit pattern on the surface of tumor using a magnifying colonoscope along with suitable dye-spraying methods, in addition to the ordinary observation with changing directions of view, dose of air, and so on. In this paper, we will present the case of a type 0-IIa+IIc colorectal cancer invading the upper two-thirds of the submucosa (sm2), which was accurately diagnosed using a magnifying colonoscope, along with a series of practical photographic records. The cancerous glands invaded the submucosa at the depressed (IIc) area of the lesion, with the result that the pits showed the type VA pattern. The usefulness of the observation of pit patterns toward the diagnosis of colorectal submucosal cancer was demonstrated. |