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A biopsy of the labial gland. Haematoxylin and eosin stain of the labial gland biopsy (200× magnification). The right white arrow indicates focal lymph infiltration (several lymphocytic foci contained more than 50 lymphocytes). The left black arrow shows part of the glandular tube structure destroyed because of necrosis. Mild collagen hyperplasia and fibrosis are present.
