PMC5395069_01
Chest computed tomography showing (A) right perihiliar infiltrate. Resolution of infiltrates (B) 3 months, (C) 9 months, and (D) 21 months later.
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F1
February 2013 showed focal right perihilar consolidation suspicious for malignancy (Fig. 1A). Flexible fiberoptic bronchoscopy revealed an endobronchial lesion at the orifice of the right middle lobe (Fig. 2A). Repeated chest CT scans performed on May and November 2013 and November 2014 remain stable with no new findings (Figs. 1B-D).
A, Bronchoscopic view showing tumor obstructing the right middle lobe. B, C, and D, Resolving endobronchial lesion up to 23 months later.
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F2
February 2013 showed focal right perihilar consolidation suspicious for malignancy (Fig. 1A). Flexible fiberoptic bronchoscopy revealed an endobronchial lesion at the orifice of the right middle lobe (Fig. 2A).
A and B, Carcinoid tumor showing monotonous round cells with finely granular chromatin, arranged in an organized pattern (A: H&E stain x10) (B: H&E stain x40). C, Tumor cells are immunopositive for chromogranin-A and (D) positive for synaptophysin (H&E stain x40). H&E indicates hematoxylin and eosin.
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F3
Immunostains were positive for synapthophysin and chromogranin (Fig. 3).