| Theme |
Exploring problems of "villous tumor" |
| Title |
Definition of villous tumors of the large intestine |
| Author |
Satoshi Nimura |
Department of Pathology, Fukuoka University |
| Author |
Keisuke Sato |
Department of Surgery, Faculty of Medicine, Fukuoka University |
| [ Summary ] |
Villous tumor of the large intestine is a descriptive term used both by histopathologists and clinicians. Macroscopically, villous tumors are generally broad-based, sessile lesions with a coarse, somewhat friable surface consisting of numerous fronds. Histologically, leaf-like projections consist of a core of lamina propria covered by a sheet of neoplastic epithelial cells. On the other hand, villous tumor is often called villous adenoma by European histopathologists since 1976. As a result of our research, the definition of villous tumors made by Iwashita in 1986 is thought to be very useful for histopathologists to produce detailed explanations of morphological features. |