Thyroid carcinoma in thyrotoxic patients treated by surgery

Area of Science:

• Endocrinology
• Oncology
• Surgical Pathology

Background:

• Thyrotoxicosis, a condition of excess thyroid hormones, can be caused by various etiologies.
• Surgical intervention is a treatment option for thyrotoxicosis, particularly in specific goiter types.

Purpose of the Study:

• To determine the incidence of thyroid cancer in patients treated surgically for thyrotoxicosis.
• To investigate the association between specific thyrotoxicosis etiologies and the presence of thyroid cancer.
• To evaluate the diagnostic significance of thyroid nodules in thyrotoxic patients.

Main Methods:

• Retrospective analysis of 1832 patients treated for thyrotoxicosis between 1970 and 1985.
• Surgical treatment was performed on 179 patients with toxic diffuse goiter (TDG), toxic nodular goiter (TNG), and toxic adenoma (TA).
• Incidence of thyroid cancer was calculated for the overall cohort and stratified by thyrotoxicosis etiology.

Main Results:

• A total of 11 thyroid cancers were diagnosed, yielding an overall incidence of 6.1% in surgically treated thyrotoxicosis patients.
• Incidence of thyroid cancer was 6.9% in TDG, 7.5% in TNG, and 2.5% in TA.
• In TDG patients with a palpable nodule, the incidence of thyroid cancer was 22.2%, compared to 2.9% in those without a nodule.

Conclusions:

• Thyrotoxicosis is frequently associated with thyroid cancer, necessitating careful evaluation.
• The presence of a thyroid nodule in patients with toxic diffuse goiter significantly increases the likelihood of malignancy.
• Thyrotoxic patients with nodules require thorough screening to exclude underlying thyroid cancer.