Acute pneumonitis associated with MOPP chemotherapy of Hodgkin's disease

A case of a 69-year-old man admitted with procarbazine pneumonitis and a review of the literature are presented. The patient completed a second course of MOPP chemotherapy for Hodgkin's disease three days before admission. He presented with a recent onset of fever, chills, anorexia, and malaise. Chest radiography indicated diffuse bilateral interstitial pneumonitis, and pulmonary function studies revealed restrictive lung disease. Attempts to identify an infectious etiology, including open lung biopsy, were negative, and empirical antibiotic therapy was ineffective. The diagnosis was drug-induced hypersensitivity reaction, most likely due to procarbazine. Corticosteroid therapy was instituted with gradual improvement. Six other cases of pneumonitis associated with procarbazine therapy are briefly reviewed, and the use of pulmonary function tests to identify the type and degree of injury and monitor therapy is discussed.