PMC8172310_01
Large undifferentiated carcinomatous cells (blue star) infiltrating the small intestine wall; normal mucosal glands at the left bottom (red arrow) HE x100.
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fig1
Cytokeratin 20, CD34, thyroid transcription factor-1, CD117 (c-kit,) and HMB45 were all negative (Figure 1).
CT scan image of the right lung tumor (red arrow) extending to the three lobes with interbronchial lymph nodes.
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fig2
A subsequent thoracic CT scan was performed to complete the extension report, which showed a polylobed mass extending to the three lobes of the right lung measuring 6 cm, with right interbronchial lymph nodes (Figure 2).
Pulmonary carcinoma: at the left top: small cell component (red arrow); at the right bottom: solid large cell component (blue star), HE x100.
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fig3
Vascular invasion and spread through air spaces were also noted (Figure 3).