Low T4 helper cell levels can have various causes, ranging in severity from 'very serious' to 'critical'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose low T4 helper cell levels, we could:
T-helper (CD4) cells (an immune cell type, unrelated to the thyroid)
Possible responses:→ Don't know
→ Under 150
→ 150 to 349
→ 350 to 500
→ Over 500 (normal)