Figure 9b. Blastomycotic mass in a 51-year-old male heavy smoker who was referred by a community clinic. (a) Chest radiograph shows a mass in the left upper lobe. (b) Corresponding CT scan shows the mass to be well circumscribed and round with irregular borders. The results of CT-guided biopsy were inconclusive, and the patient underwent left upper lobectomy and mediastinal lymph node dissection for suspected lung carcinoma. Blastomycosis was diagnosed.