Tuberculosis Presenting as an Inflammatory Pseudotumor of the Sciatic Nerve in a Rheumatoid Arthritis Patient Taking Etanercept.

Active tuberculosis (TB) in patients treated with anti-tumor necrosis factor-α (TNF-α) agents usually results from the reactivation of a latent infection.1,2 A 46-year-old woman with rheumatoid arthritis in Disease Activity Score in 28 joints remission who was taking etanercept (ETN) was admitted in our hospital due to a 4-month history of progressive hypoesthesia and paresthesia, initially on her left foot and later with extension up to the left knee.