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There is no locality of its size in the human body so rich in the various tissues which may serve as the starting point for the development of tumors, both malignant and benign, of the orbit. In it we have bone, periosteum, muscular tissue, fat, fibrous and connective tissue, glands and mucous membrane, and in the capsule of Tenon a serous cavity lined with a serous membrane. There is also the optic nerve and a liberal supply of blood vessels. Among the malignant tumors we find carcinoma, sarcoma, myo-sarcoma, and from the internal ocular tunics, melano-sarcoma and glioma. Among the benign tumors we find angioma, erectile tumors, fibroma, myxoma, lipoma, hydatids, serous and bloody cysts, dermoids, osteomata, papillomata, cysticerci and occasionally enchondroma. There are also tumors of the lachrymal gland and optic nerve, and aneurysms of the ophthalmic artery, both traumatic and idiopathic. The orbit is occasionally involved by disease
AYRES JC. ANGIOMA-MYXO-SARCOMA OF THE ORBIT, WITH REPORT OF A CASE.. JAMA. 1898;XXX(2):86-87. doi:10.1001/jama.1898.72440540034002m