Which is the most common benign orbital neoplasm found in adults?

Which is the most common benign orbital neoplasm found in adults?

• A. Optic nerve sheath meningioma
• B. Optic nerve glioma
• C. Orbital cavernous hemangioma
• D. Lacrimal gland pleomorphic adenoma

Answer: (C)

The most common benign orbital tumor in adults is an orbital cavernous hemangioma. This slow-growing vascular mass typically arises within the intraconal space and presents with painless, progressive proptosis or diplopia in adults. On imaging, it appears as a well-circumscribed lesion that enhances with contrast, reflecting its vascular nature and contained growth pattern. This combination of patient age, location, and imaging characteristics makes cavernous hemangioma the usual go-to diagnosis for a common benign orbital tumor in adults. In contrast, optic nerve sheath meningioma tends to involve the optic nerve sheath and is more often seen in middle-aged adults, but it is not as common as cavernous hemangioma. Optic nerve glioma is much more common in children (often associated with NF1) and is less typical in adults. Lacrimal gland pleomorphic adenoma occurs in the lacrimal gland fossa and causes a lacrimal gland–region mass rather than an intraconal vascular tumor, so it’s less representative of the common adult orbital neoplasm.

The most common benign orbital tumor in adults is an orbital cavernous hemangioma. This slow-growing vascular mass typically arises within the intraconal space and presents with painless, progressive proptosis or diplopia in adults. On imaging, it appears as a well-circumscribed lesion that enhances with contrast, reflecting its vascular nature and contained growth pattern. This combination of patient age, location, and imaging characteristics makes cavernous hemangioma the usual go-to diagnosis for a common benign orbital tumor in adults.

In contrast, optic nerve sheath meningioma tends to involve the optic nerve sheath and is more often seen in middle-aged adults, but it is not as common as cavernous hemangioma. Optic nerve glioma is much more common in children (often associated with NF1) and is less typical in adults. Lacrimal gland pleomorphic adenoma occurs in the lacrimal gland fossa and causes a lacrimal gland–region mass rather than an intraconal vascular tumor, so it’s less representative of the common adult orbital neoplasm.