Colorectal Cases

Overall Comment

This case was an early-stage cancer (SM cancer) of type 0-Is. At first glance, it appeared to be an intramucosal carcinoma on WL, but it presented JNET 2B on NBI. In Japan, dye endoscopic observation is recommended for JNET 2B lesions ¹⁾. In this case, crystal violet observation was added, and a diagnosis of SM carcinoma was made with Vi type pits in all areas ²⁾. Endocytoscopy also showed EC3b, which was suspicious of SM invasion ³⁾. ESD was performed at the patient’s desire and three years have passed without evidence of recurrence.

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