PMC4061443_01
Chest radiograph shows right lower lobe (RLL) collapse, similar to that of 2 years ago A. Posteroanterior view. B. Lateral view.
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The patient's posteroanterior and lateral chest radiographs are shown in Fig. 1A-B.
Chest CT scan reveals an endobronchial lesion (asterisk) in the bronchus intermedius with complete atelectasis of right lower lobe and a small pleural effusion. A, Axial window. B, Coronal lung window.
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Chest CT images (axial and coronal views) are shown in Fig. 2A-B.
Bronchoscopic imaging showing a white, smooth ovoid lesion with nearly complete obstruction of the bronchus intermedius.
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Flexible bronchoscopy showed a smooth round white polypoid lesion with wide base at the distal end of bronchus intermedius almost completely occluding the lumen (Fig. 3).
A Bundles of hypertrophied smooth muscle cells in disorganization (hematoxylin-eosin, original magnification x200). B. Immuno-histochemistry for human alpha-smooth muscle actin monoclonal antibody (original magnification x100) showing diffuse uptake of the tumor and the adjacent bronchial smooth muscle bundles in the submucosa.
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Our patient underwent bilobectomy and a biopsy of the polypoid lesion is shown in Fig. 4A-B.