Staging
T1: subepithelial connective tissue
T2: corpus spongiosum/prostate (males); periurethral muscle (females)
T3: Corpus cavernosum/beyond prostate capsule (males); anterior vagina/bladder neck (females)
T4: Invasion of adjacent organs
Pathology
Varies by location
Prostatic urethra: transitional cell
bulbomembranous urethra (proximally or posteriorly): adenocarcinoma; worse prognosis
distal urethra (anteriorly): squamous cell; better prognosis
The anterior/posterior prognostic distinction also holds in females
Epidemiology
Rare in both sexes but more common in women
May be associated with HPV infections
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