Question

Most common site of urethral carcinoma in men is:

• A. Bulbomembranous urethra
• B. Penile urethra
• C. Prostatic urethra
• D. Fossa navicularis

Hint:

Think of the segment where strictures and chronic inflammation cluster.

Answer 1

The Correct Option is A

Think anatomically along the male urethra from inside out: prostatic, then membranous, then bulbous, then penile, ending at the fossa navicularis and meatus. When you map carcinoma frequency onto this map, the peak sits at the junction zone, the bulbomembranous urethra.

Carcinoma of the male urethra is an uncommon malignancy strongly associated with prior stricture disease, chronic infection and inflammation. These chronic insults concentrate in the bulbomembranous segment, so that is where most squamous cell carcinomas arise, making up about half of cases.

The penile urethra is the second commonest segment, the prostatic urethra is the least common and usually shows urothelial histology, and the fossa navicularis is only a small distal contributor. So although every option is a real urethral location, only one is the statistical leader.

$\text{bulbomembranous} > \text{penile} > \text{prostatic}$ in frequency.
\[\boxed{\text{Bulbomembranous urethra}}\]