PMC9538506_01
(A) Lung enhanced CT scan showed a massive soft tissue shadow, about 46x35mm in the lower lobe of the right lung on April 13; (B) Lung enhanced CT scan showed a massive soft tissue shadow, about 44x30mm in the lower lobe of the right lung on July 4.
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Tongji Hospital showed a massive soft tissue shadow, about 46 x 35 mm in the lower lobe of the right lung ( Figure 1A ). To further confirm the diagnosis, the neoplasm samples in the lower lobe of the right lung were obtained using CT-guided fine-needle aspiration (FNA). On 4 July, the lung-enhanced CT scan showed that the tumor was smaller than that on 13 April ( Figure 1 ).
Pathological and immunohistochemical examination results. (A) hematoxylin-eosin staining (HE), magnificationx40; (B) HE, magnificationx100; (C) HE, magnificationx200; (D) CDX-2 positivity, magnificationx40; (E) CK7 positivity, magnificationx40; (F) CK20 negativity, magnificationx40; (G) NapsinA negativity, magnificationx40; (H) TTF-1 negativity, magnificationx40.
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Figure 2 ). Further pathological examination resulted in a diagnosis of intestinal-type adenocarcinoma of the right lung.