Table 6 A comparison of the thyroid disorders detected by primary T4-follow-up TSH testing vs. primary TSH testing
Disorder | Primary T4-Follow-up TSH | Primary TSH |
|---|---|---|
Primary CH | Good | Good |
Central CH | Some | No |
Mild CH | No | Yes |
Delayed rise TSH | Yes | No |
Unusual forms of CH, e.g., defects of thyroid cell membrane transport (MCT8), metabolism or action | No | No |