[Thyroid metastasis due to right colonic carcinoma]

Area of Science:

• Oncology
• Endocrinology

Context:

• Metastases to the thyroid gland are uncommon antemortem.
• Colorectal cancer is a leading cause of secondary malignancies.
• Thyroid masses can represent metastatic disease from distant primary tumors.

Purpose:

• To report a rare case of thyroid metastasis from colorectal carcinoma.
• To emphasize the diagnostic challenge of secondary thyroid malignancies.
• To highlight the clinical significance of considering metastatic disease in the thyroid.

Summary:

• A 62-year-old man with a history of right colonic carcinoma presented with a thyroid mass.
• The thyroid tumor was histopathologically confirmed as metastatic adenocarcinoma from the colorectal primary.
• This occurred one year after treatment for a lung metastasis from the same primary cancer.

Impact:

• Clinicians should consider secondary thyroid malignancy in patients with a history of cancer.
• Early recognition of thyroid metastases can influence patient management and prognosis.
• This case underscores the importance of thorough oncological history in thyroid nodule evaluation.