Lacrimal duct / gland
Pleomorphic adenoma

Author: Nat Pernick, M.D. (see Authors page)

Revised: 10 May 2018, last major update February 2014

Copyright: (c) 2004-2018, PathologyOutlines.com, Inc.

PubMed Search: Pleomorphic adenoma [title] lacrimal gland

Cite this page: Pernick, N. Lacrimal duct: pleomorphic adenoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/eyelacrimalpleomorphicadenoma.html. Accessed December 13th, 2018.
Definition / general
  • 50 - 60% of lacrimal gland tumors
  • Resemble salivary gland tumors of same type
  • Excisional biopsy with negative margins to prevent recurrence and implantation within the orbit
Microscopic (histologic) description
  • Usually encapsulated, composed of benign epithelial and myxoid mesenchymal elements
  • Often prominent component of S100+ hyaline cells (presumed myoepithelial origin) with diffuse eosinophilic staining
  • May have squamous metaplasia, bone, cartilage or fat
Microscopic (histologic) images

Images hosted on PathOut server:
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Well circumscribed
lacrimal gland tumor

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Islands of epithelial cells, myxoid stroma and cysts

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Double layer of epithelial cells within a myxoid stroma

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Chondroid differentiation

With carcinoma
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Large round nodule of pleomorphic
adenoma surrounded by smaller
nodules of adenocarcinoma
that have infiltrated the orbit

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Left: benign ducts within
myxoid stroma
Right: adenocarcinoma

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With adenoid cystic carcinoma