Unilateral lobectomy for Hurthle cell adenoma

Area of Science:

• Endocrinology
• Surgical Oncology
• Pathology

Background:

• Hurthle cell tumors of the thyroid present diagnostic challenges regarding their biologic potential.
• Clinicopathologic criteria for differentiating benign from malignant Hurthle cell neoplasms are debated, leading to varied surgical recommendations.
• Some advocate for total thyroidectomy for all Hurthle cell tumors due to prediction uncertainties.

Purpose of the Study:

• To evaluate the reliability of clinicopathologic criteria in predicting the behavior of Hurthle cell tumors.
• To determine the optimal surgical management for Hurthle cell adenoma versus carcinoma.
• To analyze patient demographics, tumor characteristics, and outcomes based on histologic findings.

Main Methods:

• Retrospective review of 39 patients undergoing surgery for Hurthle cell tumors between January 1980 and December 1995.
• Histopathologic assessment by an experienced pathologist to identify capsular or vascular invasion.
• Correlation of histologic findings with clinical data, including patient sex, age, tumor size, and follow-up outcomes.

Main Results:

• Histologic evidence of capsular or vascular invasion accurately identified 8 carcinomas, while 31 were classified as adenomas.
• Malignant tumors were significantly associated with male patients (P = 0.025) and larger mean tumor size (4.1 cm vs. 2.8 cm, P = 0.04).
• No recurrence or metastasis was observed in Hurthle cell adenoma patients; 4 carcinoma patients required radiation ablation for residual disease.

Conclusions:

• Pathologic assessment of capsular or angioinvasion is a reliable method for differentiating benign Hurthle cell adenomas from malignant carcinomas.
• Unilateral thyroid lobectomy is sufficient treatment for Hurthle cell adenoma.
• Total thyroidectomy should be reserved for histologically confirmed Hurthle cell carcinoma.