[Pulmonary plasma cell granuloma. Inflammatory pseudotumor in the lung]

A 62-year-old woman developed minor symptoms of subacute respiratory infection simulating bronchitis. Six weeks later, X-ray of the chest revealed a solitary round infiltration ("coin lesion") in the basal part of the left lung. No diagnosis could be made preoperatively. Thoracotomy demonstrated a plasma cell granuloma. The affected pulmonary segment of the basal part of the upper lobe was resected. There were no clinical nor radiological signs of recurrence five years after the operation.