Pulmonary dirofilariasis: the great imitator of primary or metastatic lung tumor. A clinicopathologic analysis of seven cases and a review of the literature.

The clinical, radiologic, and pathologic features of seven patients with pulmonary dirofilariasis were studied. The findings were analyzed in conjunction with those of 76 cases previously reported from the United States. We found that, in most instances, the disease was acquired in states along the Atlantic and Gulf coasts and occurred predominantly in whites (94.