Digital Rectal Exam (DRE): Indications, Technique, and Clinical Utility

The Digital Rectal Examination (DRE) is a fundamental bedside assessment performed by clinicians (physicians, NPs, PAs, trained nurses) to evaluate the distal rectum, anal canal, and—in males—the prostate gland.

Indications

• Lower GI bleeding (hematochezia, melena)
• Rectal pain, tenesmus, or mass sensation
• Change in bowel habits (constipation, incontinence)
• Prostate cancer screening (controversial; shared decision-making per USPSTF)
• Benign prostatic hyperplasia (BPH) assessment
• Prostatitis evaluation
• Fecal impaction
• Anal/rectal cancer surveillance
• Trauma (bony pelvis, urethral injury—blood at meatus contraindicates DRE)

Technique

1. Explain procedure; obtain verbal consent; chaperone offered.
2. Patient position: left lateral decubitus (knees to chest) or standing bent forward.
3. Inspect perianal area (fissures, tags, fistulae, warts, pilonidal sinus).
4. Lubricated, gloved index finger inserted gently past anal sphincter.
5. Palpate 360°: hemorrhoids, masses, strictures, sphincter tone.
6. In males: assess prostate—size, symmetry, consistency, nodules, tenderness, median sulcus.
7. Withdraw; inspect glove for blood, mucus, stool color (guaiac if indicated).

Clinical Pearls

• Normal prostate: ~20–30 g, heart-shaped, rubbery, non-tender, distinct sulcus.
• BPH: symmetrically enlarged, smooth, firm, sulcus preserved.
• Cancer: hard, irregular, nodular, fixed; sulcus obliterated.
• Prostatitis: exquisitely tender, boggy, warm.
• DRE sensitivity for prostate cancer: ~50%; specificity: ~90%. Combined with PSA improves detection.

DRE remains a high-value, low-cost component of colorectal and urologic assessment.