PMC9947515_01
PMC9947515_02
Chest radiographic image showing a mass lesion in the upper lobe of the left lung (white arrow).
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FIG1
An initial chest radiograph revealed a lesion in the upper lobe of the left lung (Figure 1).
CECT images of the lung showing the tumour in (a) coronal section, (b) sagittal section, and (c) transverse section (red arrows).. CECT: contrast-enhanced computed tomography
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FIG2
CECT showed a single mass in the left upper lobe with contrast enhancement and an irregular outline, measuring 3.4x3.5 cm with involvement of the adjacent pleura along the left lateral chest wall (Figure 2).
Hematoxylin and eosin stain of the bronchial tissue, original magnification x 100
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FIG3
The morphology was compatible with that of metastatic rectal adenocarcinomas (Figure 3).
Immunohistochemical observation of the bronchial tissue. (A) CK20 positive, (B) CK7 negative, (C) TTF-1 negative. CK20: cytokeratin 20; CK7: cytokeratin 7; TTF-1: thyroid transcription factor
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FIG4
Immunohistochemistry of the bronchial tissue showed strong positivity for cytokeratin 20 (CK20) and negativity for cytokeratin 7 (CK7) and thyroid transcription factor (TTF-1) (Figure 4).
PET images of the lung showing the tumour in (a) coronal section, b) sagittal section, and (c) transverse section (yellow arrows). PET: positron emission tomography
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FIG5
A strongly fluorodeoxyglucose (FDG) -avid lesion was identified in the inferior part of the apicoposterior segment of the left upper lobe of the lung, measuring 4.92x4.16x4.14 cm (Figure 5).
PMC9947515_03
Intraoperative image and the resected specimen of the lung tumour
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FIG6
The upper lobe along with the tumour was then removed (Figure 6).