These chest X-rays show advanced pulmonary tuberculosis. Arrows indicate the location of cavities within these light areas. The X-ray on the left clearly shows that the opacities are located in the upper area of the lungs toward the back. The appearance is typical for chronic pulmonary tuberculosis but may also occur with chronic pulmonary histiocytosis and chronic pulmonary coccidioidomycosis. Pulmonary tuberculosis is making a comeback with new resistant strains that are difficult to treat.
Pulmonary tuberculosis is the most common form of the disease, but other organs can be infected.
This nodule is seen as the light circle in the upper portion of the dark area on the left side of the picture. A normal lung would look completely black in a CT scan. Erythema multiforme lesions are often referred to as target lesions because of the concentric rings the lesions produce.