Fig. 3. Photomicrograph of transverse sections of mice ears sensitized with topical application of 5% croton oil (v/v) in acetone (a–c) or acetone alone (d), stained with (A) hematoxylin-eosin and (B) toluidine-blue examined under light microscopy (magnification, ×200). Treatments: vehicle 2% Tween 80 (a), prednisolone 0.08 mg/ear (b), and Monostroma crassidermum Tokida ethanol extract 20 μL/ear (c). The numbers 1 and 2 in (A) indicate dermis and epidermis, respectively, and the arrow in (B) indicates infiltration of mast cells.
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