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Thyroid nodules and cancer in children and adolescents affected by autoimmune thyroiditis
Andrea Corrias1, Alessandra Cassio, Giovanna Weber
1Division of Pediatric Endocrinology, Regina Margherita Children's Hospital, Piazza Polonia 94, 10126 Torino, Italy. corrand@libero.it
Insights
Juvenile autoimmune thyroiditis (JAT) is linked to thyroid cancer in children, with 3.0% of patients developing papillary carcinoma. Key indicators for malignancy include lymphadenopathy and lack of response to levothyroxine therapy.
Area of Science:
- Pediatric Endocrinology
- Oncology
- Immunology
Background:
- Juvenile autoimmune thyroiditis (JAT) is a common endocrine disorder in children.
- The association between JAT and the development of thyroid cancer requires further investigation.
- Early identification of risk factors in pediatric patients with JAT is crucial for timely diagnosis and management.
Purpose of the Study:
- To investigate the association between juvenile autoimmune thyroiditis and thyroid cancer in pediatric patients.
- To identify clinical and ultrasonographic factors associated with thyroid cancer in children with JAT.
Main Methods:
- A retrospective study was conducted across 6 Italian pediatric endocrinology centers.
- Data from 365 children and adolescents diagnosed with JAT were analyzed.
- Patients underwent regular clinical examinations, thyroid function tests, and thyroid echography; fine-needle aspiration biopsy and surgery were performed as indicated.
Main Results:
- Thyroid nodules were detected in 31.5% of patients, with 3.0% diagnosed with papillary thyroid carcinoma.
- Factors significantly associated with thyroid cancer included male sex (OR, 2.95), nodule growth during levothyroxine therapy (OR, 15.60), and lymphadenopathy (OR, 5.44).
- Papillary carcinoma was the sole histotype identified, and fine-needle aspiration biopsy proved reliable in surgical selection.
Conclusions:
- The prevalence of thyroid nodules and cancer in this JAT cohort was 31.5% and 3.0%, respectively.
- Lymphadenopathy and lack of response to levothyroxine therapy were indicators of malignancy in pediatric patients with JAT.
- Fine-needle aspiration biopsy is a valuable tool for identifying JAT patients who require surgical intervention for suspected thyroid cancer.
Objective:
To investigate the association between juvenile autoimmune thyroiditis (JAT) and thyroid cancer in pediatric patients.
Design:
We conducted a retrospective study among children and adolescents affected by JAT.
Settings:
Data from 6 Italian pediatric endocrinology centers were collected.
Participants:
Three hundred sixty-five children and adolescents affected by JAT diagnosed at 3.6 to 17.0 years of age.
Interventions:
All patients underwent clinical examination and thyroid function test every 6 to 12 months and thyroid echography every 12 to 24 months. Fine-needle aspiration biopsy was performed in 39 patients with nodule diameter of 1 cm or larger, as well as in 4 patients with nodule diameter of less than 1 cm and echographic findings suspicious for neoplasm. Twenty-three patients underwent surgery.
Main Outcome Measures:
Thyroid function, echographic pattern, nodule diameter, the presence of lymphadenopathy, and cytologic and histologic diagnoses were considered.
Results:
Thyroid nodules were found in 115 patients; findings in 11 of these were consistent with papillary carcinoma, with 5 exhibiting lymph node metastasis. The prevalence of male sex among patients with cancer was greater than that among patients with JAT (odds ratio [OR], 2.95; 95% confidence interval [CI], 1.44-6.20). The growth of nodules during levothyroxine sodium therapy (OR, 15.60; 95% CI, 1.87-181.90) and the finding of lymphadenopathy (OR, 5.44; 95% CI, 1.05-30.50) were statistically significantly associated with the presence of cancer, while uninodularity and hypoechogenicity were not.
Conclusions:
The observed prevalences of thyroid nodules and thyroid cancer in our JAT case series were 31.5% and 3.0%, respectively. Papillary carcinoma was the only histotype detected. The finding of lymphadenopathy, a lack of response to levothyroxine therapy, and nodule hypoechogenicity suggested malignancy. Fine-needle aspiration biopsy was reliable in selecting patients for referral to surgery.
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