2014 Volume 28 Issue 4 Pages 532-537
Although pulmonary histoplasmosis is rare in Japan, the number of reports of it as imported mycoses has recently been increasing. A 55-year-old woman was found to have an abnormal shadow on a chest radiograph done as part of a medical checkup after a two-year-stay in Honduras. Chest CT showed a nodule in the left lower lobe adjacent to the visceral pleura. Bronchoscopic examination could not yield a diagnosis. Thoracoscopic partial pulmonary resection was performed. On histopathology, the nodule showed a round lesion with a concentric laminar pattern, which consisted of coagulation necrosis. As a number of oval-shaped yeast-like forms were found in the central lesion with Grocott staining, it was dignosed as pulmonary histoplasmosis.
