Eradication of damaged keratinocytes in cutaneous lichen planus forms demonstrated by evaluation of epidermal and follicular expression of CK15, indices of apoptosis and regulatory protein S100.

The study of cytoskeleton arrangement and its contribution to survival of cell-to-cell contacts appears to be essential for understanding of numerous cellular and tissue processes. Applying CK15, S100 labeling and TUNEL reaction to cutaneous lichen planus subtypes, we found CK15 expression in the outer and inner root sheath of hair follicles, the basal epidermal layer, and eccrine glands. Its follicular expression was decreased in nearby inflammatory infiltrates.

Proliferative potential in benign mixed salivary gland tumors and its value in primary and recurrent neoplasms.

OBJECTIVE. Mixed salivary gland tumors are characterized by a marked diversity in the cell proliferation. It course in the stromal component, and, especially in recurrent neoplasms, is not completely understood.