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Case Reports
. 2023 Nov 9;10(11):e01204.
doi: 10.14309/crj.0000000000001204. eCollection 2023 Nov.

Thyroid Metastasis to the Colon

Eliza B Lewine  1 , Zinal Patel  1 , Jacqueline Forman  1 , Amar Manvar  1 , Iman Hanna  2
Affiliations
Case Reports

Thyroid Metastasis to the Colon

Eliza B Lewine et al. ACG Case Rep J. .

Abstract

Approximately 1% of colorectal cancers can be attributed to metastatic neoplasms originating from other primary sources typically the lung, ovary, breast, prostate, kidney, or skin. Metastasis to the colon from the thyroid however is exceedingly rare. We present a 76-year-old man with a history of papillary thyroid carcinoma WHO presented with colon polyps consistent with carcinoma from his papillary thyroid carcinoma. The findings in this report suggest prompt colorectal cancer screening after thyroid cancer diagnosis and regular screening thereafter.

Keywords: colon cancer screening; colorectal carcinoma; thyroid cancer.

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Figures

Figure 1.
Figure 1.
(A) Two 10-mm polyps at 20 cm from the anal verge. (B) One ulcerated, 10-mm polyp at 40 cm from the anal verge. This was resected with hot snare for biopsy. (C) Low-power view of sigmoid colon polyp showing colonic crypts surrounded by the lamina propria that is replaced and expanded by malignant cells that are diffusely positive for BRAF VE1 (left). High-power view of markedly pleomorphic and atypical malignant cells in the lamina propria (right).
See this image and copyright information in PMC

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