(Knowelden, 1957) suggest that the incidence of liver cancer in Uganda males is two and a half times that of a corresponding Danish population but that an elevated frequency in Uganda females could not be shown. Relative to other malignant tumours, liver cancers ranked fourth, being exceeded only by those of the uterine cervix, skin and penis (Davies, 1957). Carcinoma of the liver thus is an important and major neoplastic disease in Uganda. Most cancers arise in cirrhotic livers so that the cirrhosis also demands study.This report will attempt to characterise the pathological features both of cirrhosis and of cancer in Uganda Africans. Because the ultimate objective is to find aetiological factors, special attention was paid during this study to the histopathogenesis of the lesions and to possible causative agents of both diseases. It is known from Africa (Berman, 1951) and other countries (Steiner, 1954) that where the frequency of liver cancers is high, the disease often comes on early in life. The higher yield of tumours and the possible shortened induction time suggest that the aetiological factors are intensified. A study of the exaggerated situation might reveal cause-and-effect relationships not apparent where the frequency is low.Some special problems given consideration included the following:-1. Is the high incidence of liver cancer due merely to more cases of the usual morphological types or do new varieties enter the picture ?