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Medical Definition of Carcinoma simplex
1. An obsolete term for any form of carcinoma in which the relative proportions of stroma and neoplastic epithelial cells are not unusual, i.e., stromal elements are not comparatively abundant, nor are they reduced in amount or lacking; an obsolete term for a carcinoma lacking any identifiable microscopic pattern, such as glandular structure. (05 Mar 2000)