Lymphoepithelial cyst (lEC) of the pancreas: Cytomorphology and differential diagnosis on fine-needle aspiration (FNA)

Authors

  • Srinivas R. Mandavilli M.D.,

    1. The John K. Frost Cytopathology Laboratory, Department of Pathology, The Johns Hopkins Hospital, Baltimore, Maryland
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  • John Port M.D.,

    1. Department of Radiology, The Johns Hopkins Hospital, Baltimore, Maryland
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  • Syed Z. Ali M.D.

    Corresponding author
    1. The John K. Frost Cytopathology Laboratory, Department of Pathology, The Johns Hopkins Hospital, Baltimore, Maryland
    • Department of Pathology, The Johns Hopkins Hospital, 406 Pathology Building, 600 N. Wolfe Street, Baltimore, MD 21287–6940.
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Abstract

Lymphoepithelial cyst (LEC) of the pancreas is an extremely rare benign entity. We describe the cytopathologic findings of such a lesion in a 49-yr-old woman who was examined for epigastric pain. A trans-esophageal ultrasound-guided fine-needle aspiration of a pancreatic mass disclosed an intimate mixture of squamous epithelial cells and small, mature lymphocytes in a background of keratinaceous debris, anucleate squames, and multinucleated histiocytes. On histopathologic examination, a subsequent resection showed a multiloculated cystic lesion with a stratified squamous epithelial lining surrounded by well-formed lymphoid tissue, suggestive of LEC. The differential diagnosis includes other pancreatic pseudocysts, dermoid cyst, mucinous cystic neoplasms, adenosquamous carcinoma, and metastatic squamous cell carcinoma. Diagn. Cytopathol. 1999;20:371–374. © 1999 Wiley-Liss, Inc.

Ancillary