What precautions should be taken after a thyroid needle biosy?

If you get a cat scan why would your dr do a csytoscopy?

A cystoscopy is useful because it allows the doctor to get a first hand look at the size and position of any problems seen on the CT scan. Very small problems which may not show up on a CT scan may also be seen using cystoscopy. A biosy of any abnormal tissue can also be done during a cystoscopy.