Orbital Tumors - Hemangiopericytoma

General

• uncommon, 30-60 year old
• conjunctival prolapse, hyperemia of cul de sac conjuctiva
• may restrict motility

Imaging

• well defined with contrast CT

Pathology

• encapsulated, hypervascular and hypercellular

Surgery

• looks blue at surgery
• must be completely excised because it  can recur and be malignant
• benign-appearing lesions may become cancerous, recur and metastasize, while histologically "malignant" lesions may remain localized