4-year-old spayed female Mixed Breed Dog

• At least 3 nodular lesions in the lungs – with the nodule in the left cranial lobe appearing cavitated are noted on the thoracic radiographs.
• On the CT images there are multiple cavitated pulmonary lesions, mainly peribronchial. Most of these lesions are thick walled and contain non-enhancing material.

• Airway sampling revealed neutrophilic and eosinophilic inflammation.
• Sputum sample confirmed Paragonimus.

Progression of lesions – Paragonimus

Day 10

• Pleural effusion, subpleural nodules +/- ground-glass opacities, linear opacities.

Day 30

• Increased subpleural/peribronchial nodules, pleural effusion, pneumothorax, abdominal/chest wall air bubbles, early cavitary changes.

Day 60

• Increased cavitary changes, mediastinal lymphadenopathy.

After Day 60

• Bronchial dilation
  • Supleural groundglass opacities and subpleural nodules +/- cavitary cahnges consistently present until day 180.

Lee CH et al. Serial CT Findings of Paragonimus Infested Dogs and the Micro-CT Findings of the Worm Cysts. Korean J Radiol 2007;8:372 – 381.