Background: A 65-year-old male patient presented with progressive shortness of breath over the past 3 months, recently even at rest. He neither complained about fever nor about chest pain. The laboratory findings were normal with only a slight increase in leucocytes. A significant restrictive ventilation disorder was noted on plethysmography. His past medical history included three vessel coronary artery disease, arterial hypertension with hypertensive cardiomyopathy and atrial flutter. Carcinoma of the urinary bladder and prostate cancer were diagnosed and successfully treated 10 and 12 years earlier, respectively.