Oral Lesions Induced by Chronic Khat Use Consist Essentially of Thickened Hyperkeratinized Epithelium

Figure 1

Histological preparation of one of the study samples at 200-fold magnification under light microscopy showing how the epithelium was divided into four main components for histomorphometric analysis. Thickness of the various sections was determined by drawing arbitrary lines running vertically and reading off the length/depth as was indicated by the software.