Occasionally, it is difficult even with the diagnostic tools of endoscopic ultrasound and fine needle aspiration to determine if a pancreatic cyst is cancerous or precancerous. If the answer is not clear, sometimes repeated endoscopic ultrasound and aspiration are done if the suspicion for cancer or precancer is high. In other cases, the cyst is reexamined by CT, MRI, or even endoscopic ultrasound after a few months to detect changes that more strongly suggest that cancer has developed. In still others, surgery is recommended.
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A relatively simple tests for a pinched sciatic nerve can be done at home, if you are experiencing lower back and leg pain. Interpretation of the results of the Slump Test for sciatica can be a lot more difficult though; it's work for the experienced clinician.