Level three indicat
es the position of
the lymph nodes. In your case they are near the area where a man's " adam's apple
" would be. ( More or less )
Unless you meant "stage" and not level. If it says stage, that
means how far along in a disease you are, or how long you've had the problem.
They are saying that
the gland is measuring 1.2 cm whereas a normal size is up to 1 cm.
They haven't determined the cause, but are saying it could be from a viral infection, mono, etc.