A nurse is caring for a client who has myasthenia gravis which has not responded to medication treatments. Which of the following surgeries can treat myasthenia gravis?
Splenectomy
Thymectomy
Appendectomy
Cholecystectomy
The Correct Answer is B
A. Splenectomy is not a standard treatment for myasthenia gravis. The spleen's role is primarily related to immune function and blood filtration rather than the pathophysiology of MG.
B. Thymectomy is a surgical procedure that involves the removal of the thymus gland. The thymus gland plays a role in the development and regulation of the immune system. In some cases of myasthenia gravis, especially in younger patients or those with thymoma (a tumor of the thymus gland), thymectomy can lead to improvement or remission of symptoms. This procedure is considered in cases where myasthenia gravis is refractory to medication or in cases associated with thymoma.
C. Appendectomy is the surgical removal of the appendix and is not a treatment for myasthenia gravis. The appendix is not implicated in the pathophysiology of MG.
D. Cholecystectomy is the surgical removal of the gallbladder and is performed for conditions related to the gallbladder, such as gallstones or inflammation. It is not indicated for the treatment of myasthenia gravis.
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Related Questions
Correct Answer is D
Explanation
A. ALS is not caused by a virus or inflammation of the nerves. It is a progressive neurodegenerative disease affecting the motor neurons in the brain and spinal cord.
B. While acetylcholine breakdown is involved in other neurological conditions (such as myasthenia gravis), ALS primarily affects motor neurons and does not directly involve acetylcholine metabolism at the neuromuscular junction.
C. ALS does not typically involve significant inflammation or demyelination (which is more characteristic of conditions like multiple sclerosis). Therefore, reducing CNS inflammation is not a therapeutic target in ALS.
D. Riluzole, the medication prescribed for ALS, works by decreasing the release of glutamate, which is a neurotransmitter that can be toxic to nerve cells in high amounts. In ALS, excessive glutamate release is believed to contribute to motor neuron degeneration. By reducing glutamate release, riluzole may help protect motor neurons and slow the progression of the disease.
Correct Answer is B
Explanation
A. PSA levels themselves do not indicate a gene mutation. Elevated PSA levels are primarily associated with prostate conditions rather than genetic mutations. While certain genetic mutations can predispose individuals to prostate cancer, PSA alone does not diagnose genetic mutations.
B. Elevated PSA levels can indicate the possibility of prostate cancer, but further testing is necessary to confirm the diagnosis. Additional tests may include a digital rectal exam (DRE), imaging studies (such as ultrasound or MRI), and a prostate biopsy.
C. Elevated PSA levels can suggest prostate cancer, but they do not definitively diagnose it. Prostate cancer can only be confirmed through a biopsy that identifies cancerous cells in the prostate tissue.
D. BPH is a non-cancerous enlargement of the prostate gland that commonly occurs in older men. While BPH can cause urinary symptoms similar to prostate cancer, elevated PSA levels are not typically associated with BPH alone. PSA elevation is more specific to prostate cancer but can also occur with other prostate conditions.
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