DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Bladder endoscopy. Doctor preparing a cystoscopic electrocautery (resectoscope), which will be inserted into the bladder of a 79-year-old man through a cystoscope in the end of his penis. A cystoscope is an endoscope inserted through the urethra to examine the bladder. A cystoscopic electrocautery is used to burn through tissue in order to obtain a biopsy (tissue sample) for analysis.
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