05 November 2004
FBE, UCE, Ca, Mg, PO4, LFT, glucose
ANA, ENA, ESR
Ach (acetylcholine) receptor antibody
Repetitive nerve stimulation
Single fibre EMG (if repetitive nerve stimulation negative or inconclusive)
Marker can be improvement in eye excursion
Ice pack test
Apply ice pack to eye with ptosis for 2 minutes to see whether ptosis resolves or improves. (This is essentially a reverse Uhthoff's phenomenon in the peripheral nervous system).
CT chest: check for thymoma
muscle antibody (thymoma association): titin, myosin, actin, alpha actinin.
receptor antibody (thymoma association)