Question

1. which of the following is often necessary to treat cases of myasthenia gravis?

parathyroidectomy
hypophysectomy
thymectomy
lobectomy

Explanation:

Myasthenia gravis is an autoimmune disorder. The thymus gland is often involved in its pathogenesis. Thymectomy (removal of the thymus) is a common treatment approach as the thymus may contribute to the production of auto - antibodies that cause muscle weakness in myasthenia gravis.

Answer:

Thymectomy