Diagnosing Myasthenia Gravis with an Ice Pack - Myasthenia gravis was suspected, and the ice-pack test was performed with the placement of an instant cold pack over the left eye (Panel B). After 2 minutes, the ptosis was substantially diminished (>5 mm), indicating a positive test (Panel C) #Clinical #Diagnosis #Neuro #Myasthenia #MyastheniaGravis #Icepack #NEJM