A pulmonary mass caused by Rhodococcus equi infection in a renal transplant recipient.

Background: A 62-year-old male kidney transplant recipient was admitted to hospital with a 14-day history of fever, hemoptysis and left-sided pleuritic chest pain. He had suffered malaise, weight loss, night sweats and exertional dyspnea over the previous 3 months. Imaging studies of the patient's chest revealed a noncavitated mass measuring 5 x 8 cm in the anterior segment of the left upper lobe of the lung and a left-sided pleural effusion with septa, and bacterial cultures revealed the presence of Rhodococcus equi.