PMC8348171_01
Chest Radiograph and Computed Tomography Images. (A) Chest radiograph showed opacification of the left hemithorax with tracheal deviation to the right. (B) Computed tomography of the thorax showed a large mass in the left upper lobe and two pleural based nodules in the left lower lobe.
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The patient's chest radiograph revealed opacification of the left hemithorax with tracheal deviation to the right (Fig. 1A). There were two other lobulated pleural-based lesions seen at the posterior basal segment of the left lower lobe, and the largest measured 2.8 x 2.6cm (Fig. 1B).
Histopathological images of the left upper lobe tumor. (A) Presence of scattered epithelial tumor cells (blue arrows) embedded within a densely-packed highly proliferating immature lymphocytes of T-cell lineage, hematoxylin and eosin (H&E) stain, original magnification 400 x . (B-D) Immunohistochemistry staining. (B) Keratin-positive epithelial cell network, Cytokeratin 5 and Cytokeratin 6 expression, original magnification 100 x . Lymphocytes stained positive for (C) CD3, original magnification 100 x and (D) Terminal deoxynucleotidyl Transferase (TdT), original magnification 100 x . (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
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The lymphocytes, however stained positively for CD 3 and TdT, and negatively for CD20 (Fig. 2).