Table 1:

Confounding conditions that may present as similar to IIH^a

Medical disorders Addison disease Hypoparathyroidism Chronic obstructive pulmonary disease Right heart failure with pulmonary hypertension Obstructive sleep apnea Pickwickian syndrome Polycystic ovary syndrome Systemic lupus erythematosus Uremia Severe iron deficiency anemia

Medications Tetracycline and related compounds (minocycline, doxycycline) Vitamin A (at doses >25 000 IU daily) and related compounds (isotretinoin [Accutane], vitamin supplements, excessive intake of liver, all-trans retinoic acid) Anabolic steroids Corticosteroid withdrawal following prolonged administration Growth hormone administration in deficient patients Nalidixic acid Lithium Oral contraceptive use Levonorgestrel implant system Amiodarone Cyclosporine Cytarabine

Obstruction to venous drainage Cerebral venous sinus thrombosis Jugular vein thrombosis Superior vena cava syndrome Jugular vein ligation following bilateral radical neck dissection Increased right heart pressure Glomus tumor Compression by tumor process (eg, meningioma)

Infections HIV infection, borreliosis Postvaricella infection in children

^aAdapted from Friedman and Jacobson,⁷ Szitkar,⁸ Wall,²² and Alperin et al.⁷⁹