PMC7322609_01
(a) Computed tomography image of the chest depicting a large right upper paratracheal mass. (b) Computed tomography image of the chest depicting pleural and pericardial.
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A subsequent computed tomography study of the chest revealed extensive right lung metastatic disease and a large lobulated right upper paratracheal mass (Figures 1(a) and 1(b)).
(a) Endobronchial smooth polypoid lesion arising from the right upper lobe apical segment. (b) Endobronchial ultrasound image of the right paratracheal heterogeneous mass.
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Endobronchial ultrasound revealed a large heterogeneous paratracheal mass and a polypoid smooth endobronchial lesion in the apical segment of the right upper lobe (B1; Figures 2(a) and 2(b)).
(a) High-magnification image showing a biphasic neoplasm composed of lymphocytes and epithelial cells. (b) Immunostaining for high molecular weight cytokeratin (CK5/6) highlighting the epithelial component. The lymphocytes are negative.
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Pathology from the endobronchial lesion was consistent with metastatic thymoma (Figures 3(a) and 3(b)).