[Clinico-pathological re-examination on the first diagnosis as enterocolitis unclassified]

Sixteen surgical resected cases of "enterocolitis unclassified" diagnosed on the first pathological examination were re-examined. Their incidence was 3.0% of non-neoplastic bowel diseases registered in our department. On the re-examination including additional microscopic sections, histological reconstruction, special stainings and precise clinical data of each lesion, the 16 lesions were macroscopically divided to nine types and re-diagnosed as follows: (1) definite diseases: ulcerative colitis and phlegmonous enterocolitis, (2) probable diseases: intestinal tuberculosis and infective enterocolitis, (3) possible diseases: healed ischemic colitis, healed ischemic enteritis, healed infective colitis, and healed Crohn's disease or healed ulcerative colitis, (4) enterocolitis unclassified in a narrow sense. In conclusion, patho-morphologically the 16 lesions of enterocolitis unclassified might be subdivided into 13 lesions with the similarity to the already known inflammatory bowel diseases and three lesions with enterocolitis unclassified in a narrow sense.