Histologic changes: Here, epithelial cells are taller than normal; most are goblet cells. Note the eosinophils in the epithelium, as well as along the basement membrane where they are probably initiating epithelial slough. Eosinophils are also scattered throughout the subepithelial inflammatory infiltrate among lymphocytes, plasma cells, and mast cells. Mast cells may also be found among the epithelial cells. In this section, there is no collagenosis beneath the basement membrane.

The enlargment above (right) shows several eosinophils, plasma cells (with identifiable cytoplasm), and lymphocytes (without identifiable cytoplasm).

Clinical summary Image 4

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