Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . rotic area in secondary mass of neoplasm. (WNAI,. 711 sionally the ulcerations arc iiuiltiplc. This anatomic form may encirclethe stomach and is one of the causes of hour-,i,lass contraction. In theearlier stay^es ulcerative carcinoma may be indistinj^uishable from gastriculcer, ami it is not improbable that many of these ncojjlasms are in-stances of cancerous transfomiation of chronic gastric ulcers. (3) Thisform is, in my experience, extremely rare; it is characterized
Manual of pathology : including bacteriology, the technic of postmortems, and methods of pathologic research . rotic area in secondary mass of neoplasm. (WNAI,. 711 sionally the ulcerations arc iiuiltiplc. This anatomic form may encirclethe stomach and is one of the causes of hour-,i,lass contraction. In theearlier stay^es ulcerative carcinoma may be indistinj^uishable from gastriculcer, ami it is not improbable that many of these ncojjlasms are in-stances of cancerous transfomiation of chronic gastric ulcers. (3) Thisform is, in my experience, extremely rare; it is characterized by adiffuse infiltration of the gastric wall, which becomes greatly thickenedand often intensely indurated (leather-bottle stomach). The capacityof the organ is greatly reduced and ulceration is inconspicuous or rare cases the diffuse induration extends to the omentum and peri-gastric tissues, but extensive necrosis is infrequent. In some instancesof the ulcerative form diffuse infiltration of the contiguous gastric wallproduces localized thickening and induration, which rarely is extensive. C D. /; D Fic. 340-—Pyloric or Stomach; Marked Stenosis of Pylorus due to Contraction of Scirrhois .1 rv|..rii; H. H Pvloric wall greatly thickened by cancerous infiltration. C. Smooth base of cancerous D. Gastric mucosa infiltrated by the extending cancer. With regard to the histologic type of cancer affecting the stomachmuch confusion has arisen, largely due to the fact that all hard tumorswere formerly called scirrhus, and the soft and fungoid masses weregrouped ^vith the encephaloid cancer. Of the 1348 cancers includedin the Fenwicks collection, 863 were encephaloid. 447 scirrhous, and38 colloid. Of 115 specimens examined histologically, 73 were glandularcarctnomata, t^t, cylindric-cell epithelioma, and q showed signs of colloiddegeneration. Cancer of the stomach is infrequent in patients underfortv years of age; less than three per cent, of the pati
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