In the tubular adenoma, a large number of crypt mouths were deformitated slenderly, so that the deeper zone of the crypt was unable to be observed. In some parts of the specimen, free surface was shown like a convoluted cerebriform. 2) In the villous adenoma, the structure, like a convoluted cerebriform, was more complicated to be deeper furrows and higher folds than in other adenoma. 3) In the type Borrman I of the colonic cancer, the structure was most destroyed in any specimens. 4) In the

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... erative colitis during an active stage, its epithelium was covered with many fibrinous and mucinous debris. In the remitted stage, the polygonal units and the mouths of the crypts were deformitated polymorphically. The surface of the epithelial cells were packed with the well regulated microvillies. These microvillies were shortter than in the normal by transmission electron mycroscopy.