PMC3862697_01
Swelling of the right lower eyelid due to the tumor in the anterior inferior orbit.
opth-8-031Fig1.jpg
PMC3862697_01_opth-8-031Fig1.jpg
f1-opth-8-031
A 45-year-old man presented with a palpable mass in the medial aspect of the right lower lid (Figure 1).
Histopathological analysis of an orbital hemangiopericytoma.. Notes: (A) Low-power view showing the lobular pattern of highly cellular areas separated by fibrous tissue (hematoxylin and eosin [H&E], 40x). (B) Large, dilated vascular channels within the neoplastic cells (H&E, 100x). (C) A high-power view of the cellular areas (H&E, 400x). (D) The fibrotic areas separating the lobules were mostly acellular (H&E, 400x). (E) Factor VIII-positive immunostaining (100x). (F) Ki-67 immunostaining (200x).
opth-8-031Fig2.jpg
PMC3862697_01_opth-8-031Fig2.jpg
f2-opth-8-031
Immunohistochemistry was positive for vascular markers such as factor VIII, CD34, and Ulex (Figure 2).