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Acinic cell carcinoma
Salivary Gland
54 years
Tumor in parotid gland.
Circumscribed tumoral mass with mostly solid, focally microcystic growth pattern and focal lymphoid infiltrate. The lesion is composed of different cell types. First there are large, polygonal serous acinar cells with abundant, slightly basophilic, granular cytoplasm. The granules are diastase-resistant and refer to zymogen granules. Second there are intercalated duct type cells which are smaller, eosinophilic and vacuolated and show clear, cytoplasmatic vacuoles which are negative with PAS and mucicarmin. Some clear cells with “empty” cytoplasm and prominent cell borders can be seen.
Maya, Fünfschilling, University of Basel
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