How to Palpate for Goiter in Children
To properly palpate the thyroid gland in a child, position the child with their neck slightly flexed and examine from behind, using your fingers to feel both lobes lateral to the trachea, assessing for enlargement beyond what is visible when the neck is extended (Grade 0 = not palpable, Grade Ia = palpable but not visible, Grade Ib = visible with neck extended, Grade II = visible with neck in normal position, Grade III = visible from a distance). 1
Examination Technique
Patient Positioning
- Have the child sit comfortably with neck slightly flexed forward
- Stand behind the patient for optimal access to the thyroid gland
- This positioning minimizes the overlying sternocleidomastoid and sternothyroid muscles that can obscure up to half of the lateral thyroid 2
Palpation Method
- Place your index and middle fingers on both sides of the trachea
- Palpate both thyroid lobes systematically, moving from superior to inferior
- Ask the child to swallow (offer water if needed) - the thyroid moves upward with swallowing, helping distinguish it from other neck structures
- Feel for size, consistency, nodularity, and tenderness
Grading System (WHO 2001 Criteria)
The thyroid should be graded as follows 1:
- Grade 0: Not palpable
- Grade Ia: Palpable but not visible, even with neck extended
- Grade Ib: Palpable and visible only when neck is extended
- Grade II: Visible with neck in normal position
- Grade III: Visible from a distance
Goiter is defined as Grade Ia or above 3
Important Clinical Caveats
Limitations of Palpation
Be aware that physical examination has significant limitations:
- Moderate interobserver agreement (kappa 0.55-0.61) even among trained examiners 3
- Agreement is lower in younger children and those with lower body mass index 3
- Palpation can overestimate thyroid size in 27% of cases compared to ultrasound 4
- Sensitivity for detecting nodules is only 20.3% for solitary nodules and 10.8% for multinodular goiter 5
When to Confirm with Imaging
Given the moderate accuracy of palpation, ultrasound should be performed when:
- Any palpable thyroid enlargement is detected
- There is clinical suspicion despite negative palpation (especially in younger children)
- Nodules are suspected
- Precise measurement is needed for monitoring
Ultrasound with a 10-15 MHz high-frequency linear transducer provides resolution of 0.7-1.0 mm and is the gold standard for assessing thyroid size and structure in children 1
Additional Assessment
When examining for goiter, also:
- Look for associated congenital malformations, particularly cardiac defects, as these occur more frequently in children with thyroid disorders 1
- Assess for dysmorphic features or neurodevelopmental concerns
- Consider checking thyroid function tests (TSH, free T4) and urinary iodine excretion if goiter is confirmed
Age-Specific Considerations
- Palpation is less reliable in children aged 6-7 years compared to older children 3
- Use body surface area-based reference values rather than age-based norms when interpreting ultrasound findings, as they better reflect actual physical development 6
The combination of careful palpation technique with low threshold for ultrasound confirmation provides the most accurate assessment of thyroid size in children, particularly given that 60% of cases with palpable abnormalities have additional findings on ultrasound 5.