... likelyto die of the disease (6, 14). Age-related changes in the tuber-culin skin reaction and a high incidence of underlying illnessesalso play a role in prolonging the final diagnosis (15). ... of Internal Medicine; Department of Radiology*, Seoul National University College of Medicine, Seoul; Department of Radiology, AsanMedical Center, University of Ulsan College of Medicine,Seoul, ... diagnosis of TB in the elderly. A positive spu-tum AFB smear was obtained in 57.1% of elderly and in 57.5% of young TB patients, and a positive AFB culture was ob-tained in 70.6% of the elderly...