PMC8897609_01
Colonoscopy showing the rectal tumor.
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The colonoscopy showed a tumor highly suspicious for malignancy with a central depression of 25 mm ( Figure 1).
Magnetic resonance imaging scan showing the rectal tumor.
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T2 without metastasis to lymph nodes or distant metastasis ( Figure 2). The histopathologic examination of the rectal lesion showed a primary signet ring cell carcinoma that was histologically distinct from the appendiceal tumor.
Timeline of events.. CT; computed tomography.
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Figure 3 presents a timeline of the events.