“…On the other hand, it is established that both acute and chronic ulcers perforate, although it may appear to be of academic interest only to differentiate between them. However, Lowdon (1952) has shown that the duration of dyspepsia correlates with the histological findings, for in patients with a history of less than one month, 80% of the ulcers showed no signs of chronicity. Most authorities who have classified their patients in this way have concluded that patients with an acute ulcer fare better than those whose lesion is chronic (Illingworth, Scott, and Jamieson, 1946;Gilmour, 1953;Taylor and Warren, 1956).…”