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epithelial dysplasia. Definitions: 1. a disorder of differentiation of epithelial cells which may regress, remain stable, or progress to invasive carcinoma. The definition information for epithelial dysplasia is provided by Stedman's. You can search our medical dictionary here.
1 Dysplasia, a pre-malignant condition, refers to abnormal epithelial growth characterized by a spectrum of cytologic, maturational, and architectural changes. 2  Carcinoma in situ means abnormal changes are seen in the entire thickness of epithelium, extending from basal cell layer to surface.