Referral Pathway for Patients with Confirmed Thyroid Nodules

Initial Evaluation and Diagnostic Process

The American College of Endocrinology recommends that all patients with thyroid nodules should undergo fine-needle aspiration biopsy (FNAB) to confirm the pathological diagnosis before determining management pathway 1, 2
Ultrasound-guided FNAB is the preferred method as it is accurate, economical, safe, and effective for diagnosing thyroid nodules 1
Complete ultrasound evaluation of both the thyroid and cervical lymph nodes should be performed when thyroid nodules are found 2

The American Thyroid Association recommends that all patients with thyroid nodules should first be evaluated by an endocrinologist for comprehensive assessment 1, 2
Patients with autonomously functioning thyroid nodules require endocrinology management for thyroid function assessment 1
Symptomatic benign nodules or nodules ≥2 cm with gradual increase in size should be referred to interventional radiology for consideration of thermal ablation 1
Nodules with suspicious or malignant cytology should be referred for surgical evaluation 2

Adolescent patients with PTEN hamartoma tumor syndrome should be referred to pediatric endocrinology with transition to adult endocrinology at appropriate age 3
Baseline thyroid ultrasound is suggested at age 12 for high-risk pediatric patients 3

Regular follow-up is required after treatment of both benign and malignant thyroid nodules, including volume reduction rate assessment, evaluation of compression symptoms, cosmetic concerns, and thyroid function 1
For malignant nodules treated with thermal ablation, TSH suppression therapy should be implemented with endocrinology follow-up 1

Failing to perform FNAB before deciding on referral pathway 1
Not evaluating cervical lymph nodes during initial assessment, potentially missing metastatic disease 1, 2
Failing to consider molecular testing for indeterminate nodules, which can assist in diagnosis and guide appropriate referral 2