Geographic Pathology of Lymphoreticular Tumors: Summary of Survey From the Geographic Pathology Committee of the International Union Against Cancer 1

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Abstract
Data on the relative frequency of lymphomas as collected by the Geographic Pathology Committee of the International Union Against Cancer are presented, with emphasis on the difficulties in interpretation of the material. Based on gross differences in the distribution of lymphomas, the countries studied fell into 5 groups: 1) tropical countries with epidemic proportions of Burkitt's lymphoma; 2) tropical countries where Burkitt's lymphoma was not excessive,with high proportions of Hodgkin's disease in children and low proportions in young adults; 3) tropical and subtropical countries with features of ,the second group but with additional high proportions of Hodgkin's disease in young adults and high frequencies of the nodular sclerosis subtype; 4) affluent societies with a low incidence of Hodgkin's disease in children, a predominance of nodular sclerosis, and frequent multiple myeloma; and 5) oriental countries with a low frequency of Hodgkin's disease and a high frequency of reticulum cell sarcoma. finally, we call attention to peculiar types of lymphomas which are reported in the literature with unusual frequency in certain parts of the world.

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