AAION stands for which condition?

AAION stands for which condition?

• A. Arteritic Anterior Ischemic Optic Neuropathy
• B. Aneurysmal Anterior Ischemic Optic Neuropathy
• C. Acute Anterior Ischemic Optic Neuropathy
• D. Arterial Anterior Ischemic Optic Neuropathy

Answer: (A)

AAION stands for Arteritic Anterior Ischemic Optic Neuropathy. The letters map to Arteritic, Anterior, Ischemic, Optic, Neuropathy, reflecting an inflammatory (vasculitic) cause of anterior optic nerve ischemia—most classically giant cell arteritis. This form is distinct from non-arteritic AION, which is due to microvascular disease rather than an inflammatory arteritis. The other terms don’t fit the established terminology: “Aneurysmal” isn’t used to describe this acronym, “arterial” would alter the intended meaning, and “acute” describes timing rather than the pathologic etiology captured by the acronym.

AAION stands for Arteritic Anterior Ischemic Optic Neuropathy. The letters map to Arteritic, Anterior, Ischemic, Optic, Neuropathy, reflecting an inflammatory (vasculitic) cause of anterior optic nerve ischemia—most classically giant cell arteritis. This form is distinct from non-arteritic AION, which is due to microvascular disease rather than an inflammatory arteritis. The other terms don’t fit the established terminology: “Aneurysmal” isn’t used to describe this acronym, “arterial” would alter the intended meaning, and “acute” describes timing rather than the pathologic etiology captured by the acronym.