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Chest computed tomography (CT) images show a pulmonary hemorrhage spreading radially in the right upper lobe.
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S1 of the right upper lobe (Fig. 1). Seven years later, she had a second episode of hemoptysis.
Transverse and coronal chest CT images show a growing pulmonary nodule in the right middle lobe.
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S4 of the right middle lobe against a background of interstitial pneumonia (Fig. 2). She was admitted to our hospital for further examination and treatment.
Positron emission tomography/CT images show the low signal accumulation of signal in a pulmonary nodule (arrow).
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The maximum standardized uptake value was 0.94 (Fig. 3).
Macroscopic findings of the surgically resected pulmonary nodule. The nodule exhibits white pleural change (arrowhead); its cut surface is also white (arrow).
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As neither primary lung carcinoma of a particular histological subtype, including mucinous adenocarcinoma, nor a low-grade malignant tumor could be ruled out, a diangnostic wedge resection of the right middle lobe (S4) was performed (Fig. 4).
Histopathological findings of the pulmonary nodule. Dirofilaria immitis is present in the center of the necrotic granuloma (left; arrowhead). The worm has the characteristic internal longitudinal cuticular ridges (right; arrow).
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The postoperative histopathological diagnosis was granuloma with pulmonary dirofiliasis (Fig. 5).