Which procedure allows direct visualization of the bladder interior with an endoscope?

• A. Cystography
• B. Cystoscopy
• C. Ureteroscopy
• D. Voiding Cystourethrogram

Answer: (B)

Direct visualization of the bladder interior with an endoscope is achieved with a cystoscopy. In this procedure, a cystoscope—a slender endoscope designed for the bladder—is inserted through the urethra into the bladder, allowing a direct, real-time view of the bladder mucosa, the ureteral openings, and any abnormalities such as lesions or stones. This hands-on inspection contrasts with imaging studies that use contrast material or X-rays to visualize the bladder without an inside-the-bladder view.

Cystography and voiding cystourethrogram rely on radiographic images obtained after filling the bladder with contrast material, so they reveal shape and function but not a direct endoscopic view of the bladder lining. Ureteroscopy targets the ureter and renal pelvis via the urethra, primarily evaluating issues in the ureter rather than the bladder interior, though it can involve the bladder entry. Thus, the procedure that provides direct endoscopic visualization of the bladder interior is cystoscopy.