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The assessment of a pulmonary "coin" lesion continues to be difficult, despite the diagnostic armamentarium now available; and thoracotomy is frequently required to determine the nature of the lesion.
Faust et al1 reported the first case of a dog heart-worm infestation in a human in the United States. This particular worm was identified as a Dirofilaria louisianensis, was found in the inferior vena cava, and did not appear to be causing symptoms. Osborne et al2 reported a solitary pulmonary nodule due to Ascaris lumbricoides. In the report, it was noted that one parasitologist suggested that this parasite might be a Dirofilaria. Dashiell3 reported a case of Dirofilaria in the lung of a 57-year-old white woman. Goodman and Gore4 reported a pulmonary infarct secondary to D immitis. Harrison and Thompson5 reported two cases of pulmonary dirofilariasis, one in a 53-year-old white woman, the other in a
Lewis JF, Williams RW, Tinsley EA. Pulmonary "Coin" Lesion Due to Dirofilaria immitis: Report of Two Cases. Arch Surg. 1969;98(3):388–390. doi:10.1001/archsurg.1969.01340090164035
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