CS question about diagnostic tests

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bobdoleisok

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Hey guys, I'm still finding the official information on the CS exam a bit vague. I'd like to use an example, and can you tell me what you guys would pick in the situation please :)

Example: In a case where it is pretty obviously MYASTHENIA GRAVIS, but we will still include other differentials that are similar and close to it, so:

1. Myasthenia Gravis
2. Horner's Syndrome
3. Multiple Sclerosis

What would you put for your lab tests?
1. AchR antibodies
2. Tensilon test (is it necessary if we're already checking via AchR antibodies?)
3. CT - chest (isn't this more like a followup test IF indeed it is definitely Myasthenia Gravis?)
4. MRI - brain (although we have Multiple Sclerosis, it's far less likely than Myasthenia Gravis)

I'm curious of your opinions. I'm paranoid of shot-gunning. In real life, we'd probably just check for MG, and if those came up negative, we'd do more tests to assess for MS, etc. I'm not sure what the CS expects from us.

Thanks for any advice!

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