A 60-year-old woman had history of kidney transplantation 1 year ago and had received immunosuppressive drugs. She presented with fever, bilateral shoulder pain, lower abdominal pain, and poor appetite for 3 days. Wholebody positron emission tomography showed increase uptake in anterior mediastinum, pericardium, and lymph nodes, with the clinical impression of anterior mediastinal malignancy with lymph node and pericardium metastases. She received pericardiectomy and was diagnosed as having aspergillus pericarditis with abscess formation. Despite intensive antifungal treatment, she died of septic shock and multiple organ failure 3 weeks later. Aspergillus pericarditis occurs in immunocompromised patients and is always the result of contiguous dissemination of aspergillus from the lung or myocardium, with a high mortality rate. Only few cases have been successfully treated with intensive antifungal treatment and aggressive surgical pericardiectomy.