Cancer is thought of as a disease connected to civilization, even in the interior of Africa.
Cancer: The Problem of Its Genesis and Treatment
First I turned to the cited Hoffman compendiums, the 1915 Mortality from Cancer Throughout the World and the 1937 Cancer and Diet. Among applicable references I found one in the 1937 book that does face squarely the issue of whether the advancing of Europeanization has been considered to have promoted cancer in Africa. The source given on Hoffman's page 41 is Cancer: The Problem of Its Genesis and Treatment, by Dr. F. W. Ross (London, 1912):
“... the savage negro in the interior of Africa is enjoying ‘His comparative immunity from cancer because his method of preparing his food and drink is different in every essential from the methods used by the more civilized negro and white man ...’”