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Pulmonary Lesions Associated With Visceral Larva Migrans Due to Ascaris suum or Toxocara canis: Imaging of Six Cases

¹ Department of Health Sciences, School of Medicine, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
² Department of Radiology, International Medical Center of Japan, Tokyo, Japan.
³ Department of Clincal Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.

OBJECTIVE. The objective of our study was to evaluate chest radiographic and CT findings of patients with pulmonary lesions associated with visceral larva migrans due to Ascaris suum or Toxocara canis. CT investigation was focused on the location, size, contour, and internal features of the lesions; migration of lesions; mediastinal lymphadenopathy; and pleural effusion.

CONCLUSION. Pulmonary visceral larva migrans appears on CT as multifocal subpleural nodules with halo or ground-glass opacities and ill-defined margins.

Keywords: Ascaris suum • CT • nematodes • parasites • pulmonary diseases • roundworms • Toxocara canis • visceral larva migrans

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