A thirtysomething friend of mine, let’s call her Sally, started running last year in an effort to get in better shape.
As often happens in these scenarios, Sally developed some foot pain. So she went to a “foot” doctor (I’m not sure whether she meant a podiatrist or an orthopedic surgeon specializing in feet).
Reasonably enough, the doctor ordered an x-ray of her foot. The official reading showed no fracture, but there was a “questionable” finding on the edge of one of the midfoot bones such that the doctor couldn’t rule out some more insidious process. A stress fracture, perhaps? Those can be awful, and take a long time to heal.
So, again in reasonable fashion, the doctor ordered a CT scan of Sally’s foot. This is the logical next step if a plain old x-ray is abnormal. Heck, a lot of the time, even when an x-ray is normal, we still order the CT scan looking for something that we can’t see on the x-ray.
And though I said this was a reasonable choice, if you really think about it, was it so reasonable?