8 results
Myasthenia Gravis Overview

Myasthenia Gravis is an autoimmune disorder of the postsynaptic neuromuscular junction.  Ab to
Myasthenia Gravis ... Ocular- 50%: Ptosis ... chewing, loss of smile ... life-threatening Differential ... immunologic assay - MuSK
Drugs associated with worsening of Myasthenia Gravis (MG):
•	D-penicillamine 
•	Botulinum toxin.
•	Telithromycin
•	Fluoroquinolones 
•	Quinine
•	Magnesium
•	Macrolide antibiotics 
•	Corticosteroids (may cause transient
Gravis (MG): • ... Patients with MuSK-MG ... because of bulbar weakness ... ocularmyasthenia #ptosis ... muscle-specificreceptortyrosinekinase #AChR #MuSK
Ocular Myasthenia Gravis on Physical Exam

A 41yo female was referred by her neurologist for double vision.
non-localized EOM weakness ... and bilateral ptosis ... Myasthenia gravis ... tumor, and always ask ... #clinical #video
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
Sensory Changes - Differential ... • Cardio-pulmonary ... Oculomotor • Myasthenia ... Gravis • Lambert-Eaton ... Myasthenic Syndrome
Ptosis - Differential Diagnosis Framework

Ptosis (Greek- to fall) Drooping of the upper eyelid that usually results
Ptosis - Differential ... Myasthenia gravis ... and weakness of ... gravis • Botulinum ... gravis • Ocular
Myasthenia Gravis - Summary
 • an autoimmune disease of the postsynaptic neuromuscular junction associated with antibodies
Myasthenia Gravis ... anti—muscle-specific kinase (MuSK ... antibodies - MuSK-positive ... or respiratory weakness ... #Gravis #diagnosis
Causes of Neuromuscular Weakness
 • Spinal Cord: Demyelinating Disease (MS), Epidural abscess, Infarction, Syringomyelia, Tetanus, Transverse
Neuromuscular Weakness ... Demyelinating Disease (MS ... Eaton Syndrome, Myasthenia ... Gravis, Organophosphate ... #Causes #differential
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
Weakness - Differential ... Non-neuromuscular disorder (Cardiac ... Postsynaptic: Myasthenia ... Gravis - Lack ... #Differential #