quantitative analysis of the collagen production by isolated stroma cells and undifferentiated ( kato-iii ) and highly differentiated ( mkn-28 ) carcinoma cells in culture in the presence and absence of a combination of the conditioned medium of these cells has shown that the scirrhous carcinoma of stomach results from the `` '' stroma reaction '' '' of stroma cells induced by infiltrating malignant epithelium .
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differentiated
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cells