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The differential diagnosis for an orbital mass is extensive and includes both benign (cavernous hemangioma, sarcoid, varix, meningioma and pseudotumor) and malignant (orbital lymphoma, metastasis, glioma) lesions. Read more »
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Orbital pseudotumor is the most common cause of a painful orbital mass in adults. It is a mass comprised of inflammatory cells (lymphocytes, macrophages etc) and fibrosis, is typically unilateral and infiltrative. Read more »