Papillary thyroid carcinoma with thyroiditis: lymph node metastasis, complications.

Area of Science:

• Endocrinology
• Oncology
• Pathology

Background:

• Thyroiditis is an inflammation of the thyroid gland.
• Papillary thyroid cancer (PTC) is the most common type of thyroid malignancy.
• The interplay between thyroiditis and PTC clinicopathologic features requires further investigation.

Purpose of the Study:

• To evaluate the clinicopathologic characteristics of papillary thyroid cancer (PTC) in patients with coexisting thyroiditis.
• To determine the complication rate in PTC patients with and without thyroiditis.

Main Methods:

• Retrospective review of 1,247 patients with PTC who underwent thyroidectomy.
• Patients were divided into two groups: 316 with thyroiditis (Group I) and 931 without thyroiditis (Group II).
• Clinicopathologic results and complication rates were compared between the two groups.

Main Results:

• Group I (with thyroiditis) showed associations with female gender, preoperative hypothyroidism, total thyroidectomy, and absence of extrathyroid extension, lymphovascular, and perineural invasion.
• Fewer central lymph node metastases were observed in Group I, with no difference in lateral lymph node metastasis.
• Postoperative hypothyroidism was more frequent in Group I patients who underwent lobectomy; overall complications did not differ.

Conclusions:

• Papillary thyroid cancer (PTC) in the presence of thyroiditis exhibits less aggressive pathological features.
• Increased incidence of postoperative hypothyroidism is noted in PTC patients with thyroiditis, particularly after lobectomy.