A case of aspergillosis of the lung.

Aspergillosis of the lung is a very rare disease and is due chiefly to the Aspergillus fumigatus, but sometimes to A. niger, and, even more rarely, to the Aspergillus flavus. This disease is usually confused with pulmonary tuberculosis, and, in fact, sometimes coexists with it. Because there are on record very few such cases not co-existent with pulmonary tuberculosis, we have thought it desirable to describe our case of aspergillosis of the lung, which for a long time was treated as pulmonary tuberculosis.