PMC4548269_01
CT of orbits shows a mass in the lacrimal gland area (arrow) demonstrated by the transverse (top) and coronal (bottom) views.
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F1
A CT scan of the orbits and sella demonstrated an asymmetric prominence of the right lacrimal gland without bony changes (Fig. 1).
A, The mass is composed of a diffuse sheet of histiocytes with ground glass cytoplasm. B, The histiocytes contain vesiculated nuclei with prominent nucleoli (arrowhead). C, There are occasional giant cells present (arrow). D, There are intervening bundles of collagen between collections of histiocytes. Immunohistochemical stains are positive for vimentin (E) and CD68 (F) in the histiocytes. A, hematoxylin-eosin, x100; B, hematoxylin-eosin, x150; C, periodic acid-Schiff, x100; D, Masson trichrome, x100; E, and F, peroxidase anti-peroxidase, x100.
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F2
Microscopic examination showed a mass composed of numerous histiocytes with ground glass cytoplasm (Fig. 2).