Rasamsonia argillacea species complex myocarditis in a patient with chronic granulomatous disease

Herein, we present a case of successfully treated biopsy-proven Rasamsonia argillacea species complex myocarditis, pericarditis, and pulmonary infection in a 35-year-old male with a history of chronic granulomatous disease. Computed tomography of the chest demonstrated numerous pulmonary nodules and mass-like pulmonary lesions, and subsequent cardiac magnetic resonance imaging demonstrated an infiltrating mass-like lesion within the interventricular septum and pericarditis. Endobronchial, thoracoscopic, and eventual myocardial biopsies with cultures were ultimately reported as positive for R. argillacea species and the patient was treated with tailored antifungal therapy resulting in a significant therapeutic response upon short interval follow-up. This case stresses the importance of recognizing unusual thoracic imaging manifestations of an atypical fungal infection in immunocompromised individuals in order to expedite treatment of an otherwise potentially fatal disease.