The concurrent development of Guillain-Barr? syndrome (GBS) and myasthenia gravis (MG) is
rare. It has been associated with molecular mimicry between infectious agents and self-antigens. Such antibodies
may show cross-reactions against both myelin proteins of peripheral nerves and acetylcholine receptors
of neuromuscular junctions. Thymoma-associated multi-organ autoimmunity may also play a role in
initiating autoimmune process. We present such a case with the concurrent development of GBS and MG.
