抄録
The classification of tumors of RES has been reported on the basis of the authors' criteria of the RES1-5). Incidence of tumors of RES in Japan has been compared with that in America and some views on the types of tumors of RES are also discussed. In Japan, it is a remarkable fact that incidence of reticulosarcoma is the highest among all tumors of RES.
As for the types of tumors of RES, there are similar points in reticuloma and histiocytoma, namely, both tumors are rare and have the same nature except that histiocytoma is rich in fibrous stromal tissue owing to the site of its subcutaneous origin.
The authors have classified reticulosarcoma into three forms according to the site of growth as follows, i) lymphatic reticulosarcoma ii) myelogenic reticulo-sarcoma iii) reticulosarcoma originated from other organs and tissues. Most of reticulosarcomas belong to the lymphatic reticulosarcoma; the other two forms are very scarce. The so-called stellate cell sarcoma of the liver should be called hepatic reticuloendothelioma and Ewing's tumor is identical with reticuloendo-thelioma of the bone marrow. These tumors are scarce, especially hepatic reticuloendothelioma.
The reports on Brill-Symmers disease are scarce in Japan, especially those of autopsy cases. Lindau's tumor should be named angioreticuloma according to the character of component cells.
