[khanar]

A 24-year-old female presents to her primary care physician with complaints of weakness and fatigue, worse in the afternoons for the last several months. The fatigue is relieved with a short nap. She has prominent bilateral ptosis. Which of the following is the target of the autoantibodies in this disease?

A- Acetylcholinesterase
B- Muscle fiber acetylcholine-gated ion channels
C- Muscle fiber membrane
D- Nerve fiber calcium channels
E- Nerve fiber membrane

 

[just_md]

B.

myasthenia gravis

 

[doctorF]

B-- myasthenia

 

[Seetal]

yes!! B B and B. myasthenia gravis. type II hyeprsensitivity (although sometimes referred to as type V)