| Theme |
Exploring problems of "villous tumor" |
| Title |
Endoscopic diagnosis of colorectal villous tumors |
| Author |
Hiroshi Kawano |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Osamu Tsuruta |
Division of Gastroenterology / Division of Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author |
Tetsuhiro Noda |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Shuichiro Nagata |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Yasuhiko Maeyama |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Keita Nakahara |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Keiichi Mitsuyama |
Division of Gastroenterology, Kurume University School of Medicine |
| Author |
Jun Akiba |
3Division of Pathology, Kurume University School of Medicine |
| Author |
Michio Sata |
Division of Gastroenterology, Kurume University School of Medicine |
| [ Summary ] |
It has been reported that villous tumors are epithelial tumors with villous structures and high malignant potential. The endoscopic findings related to villous tumors are as follows ; villous or fine granular surface structure observed with conventional endoscopy, linear microvascular pattern and clearly defined surface pattern observed with NBI, type IV pit with long shallow villous structure observed with magnifying endoscopy. It is often difficult to diagnose carcinomas and depth of invasion of villous tumors. When the large villous tumors or shortened villous structures are observed with conventional endoscopy, unclear microsurface pattern is observed with NBI, type V pit is observed with magnifying endoscopy, we should diagnose these lesions as being carcinomas. When expansive appearance, disappeared surface villous structure, impaired extensibility at the circumference of lesion are observed with conventional endoscopy, absent microvascular pattern and absent microsurface pattern are observed with NBI, severely irregular VI pit or VN pit are observed with magnifying endoscopy, we should diagnose those lesions as being SM massively invasive carcinomas. |