THE DIGESTIVE SYSTEM. 545 



often to a considerable extent the glandular type is maintained in many 

 parts of the growth (Fig. 184, page 337). The cylindrical or poly- 

 hedral epithelial cells line variously shaped alveoli, which frequently 

 maintain well-marked lumina. Cystic distention of these may occur. 



Fibrous carcinoma, scirrhus, is the next most frequent type, and such 

 are often the infiltrating forms (Fig. 199, page 347). 



The third type, gelatinous carcinoma (Fig.- 200, page 348), often forms 



FIG. 318. HAIR BALLS FROM HUMAN STOMACH. 

 This specimen consists largely of hairs, cotton and woollen threads, straws, etc. 



extensive growths and is apt to invade adjacent structures and to estab- 

 lish metastases. 



Stenosis of the pylorus and chronic gastritis, adhesions, fistulas, dis- 

 tortion of the stomach, perforations, etc., haemorrhage, suppurative in- 

 flammation, are among the frequent secondary complications of gastric 

 cancer. 



Among the relatively infrequent secondary cancers of the stomach, 

 those originating in the breast are proportionately large. 1 



Cysts of the stomach wall have been recorded. 2 



For recent general bibliography of lesions of the stomach, see Thorel, Lubarsch and 

 Ostertag's "Ergebnisse," Jahrg. v. for 1898, p. 142. 



FOREIGN BODIES. 



Among the various foreign bodies which by accident or design may 

 be present in the stomach may be mentioned hairs, thread, string, etc., 

 which have been swallowed from time to time, usually by hysterical 

 women. These may be closely packed together into a large mass nearly 



1 For statistics see Welch, reference above. 



2 Schultz has seen a large cyst of undetermined origin, Trans. New York Path. 

 Soc., 1899-1900. 



35 



