耳下腺の良性リンパ上皮性疾病変例

概要

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A case of benign lymphoepithelial lesion (BLEL) in the parotid gland is reported. The patient was a 60-year-old female with a solitary mass of the right parotid gland, not complicated with Sjögren's syndrome. The CT scan and echogram demonstrated a well-circumscribed mass and we treated this lesion as a parotid tumor. The pathological findings in the resected tumor were atrophy of the glandular parenchyma and lymphocytic infiltration with islands of epithelial cells (epimyoepithelial islands). The histogenetic origin of the cells in the epimyoepithelial islands was investigated immunohistochemically. The majority of cells in these islands were stained with anti-cytokeratin and anti-actin antibodies. These results suggest that myoepithelial cells play an important role in the histogenesis of epimyoepithelial islands in BLEL.
耳鼻咽喉科臨床学会の論文