. Radiography and radio-therapeutics . .:> liours. 7 hours. 24 hours. Fig. 293.—Chronic pyloric obstruction. Cicatricial contraction at pylorus, dilatation of stomach. the most difficult to demonstrate by radiography, the demonstration ofthe actual ulcer itself, though its presence may be suspected by the behaviourof the stomach when an opaque meal is given, viz. the rapid movement,emptying and hyperactivity of movement, and a high position of theorgan. This is also the ulcer which gives rise to marked symptoms. Itmay be multiple. The Chronic Ulcer.—The chronic ulcer is larger. It may
. Radiography and radio-therapeutics . .:> liours. 7 hours. 24 hours. Fig. 293.—Chronic pyloric obstruction. Cicatricial contraction at pylorus, dilatation of stomach. the most difficult to demonstrate by radiography, the demonstration ofthe actual ulcer itself, though its presence may be suspected by the behaviourof the stomach when an opaque meal is given, viz. the rapid movement,emptying and hyperactivity of movement, and a high position of theorgan. This is also the ulcer which gives rise to marked symptoms. Itmay be multiple. The Chronic Ulcer.—The chronic ulcer is larger. It may reach anenormous size, and involve a large area of the stomach walls ; it may pene-trate the mucosa and invade the muscular walls, and even other organs. Itmay heal rapidly, or, on the other hand, no attempt at healmg may occur foryears. This form is the one most frequently shown by radiography, eitherdirectly or by its effects upon the stomach. It may heal in places, leaving ULCER OF THE STOMACH 347 cicatricial contractions, whic
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