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Non-Infectious Complications of Penile Prosthesis Surgery

Infection is covered in depth in its own article — the most consequential complication and the one the prosthetic urologist spends the most effort preventing. This article covers the non-infectious complications that nonetheless account for the majority of late revisions: erosion and extrusion, glans ischemia and necrosis, cylinder aneurysm, mechanical failure, urinary retention, hematoma, chronic pain, and sensory changes. Revision-specific scenarios (SST, crossover, perforation) are covered in revision scenarios.

The 2025 PHOENIX multicenter registry and the 2025 Cocci systematic review together provide the best contemporary complication-rate estimates.[1][2]

Rate Summary​

ComplicationRateTiming
Overall early complications~4.6%<2 weeks
Hematoma~0.6%Immediate
Urinary retention~5.8%Immediate / early
Acute postoperative pain (severe)1–3%Immediate / early
Infection1–3% primary; up to 10%+ revisionWeeks to months
Mechanical failure~15% at 5–11 yearsLate
Erosion — cylinder through glans/urethra0.02–5% (up to 32.5% in high-risk)Weeks to years
Pump erosionUncommonYears
Reservoir erosion (bladder)RareVariable
Cylinder aneurysm~1–3%Years
Penile shortening (subjective)Highly variableImmediate
Glans ischemia/necrosisRare1–14 days
Chronic pain5–10%Weeks–years
Sensory changeVariable (higher in IP approach)Immediate

Erosion and Extrusion​

Cylinder erosion through the glans or urethra​

The most feared non-infectious complication. Distal glans erosion — cylinder tip protrudes through the glans — presents as visible device, glans pain, bleeding, or bloody discharge. Urethral erosion presents as hematuria, dysuria, recurrent UTI, palpable cylinder in the urethra on exam, or cylinder visible on cystoscopy.[3]

Risk factors:

  • Diabetes — impaired tissue integrity is the strongest single risk factor
  • Pelvic radiation — substantially elevates risk; the highest-risk population in non-diabetic patients
  • Spinal cord injury with impaired sensation — the patient does not feel the developing erosion
  • Aggressive distal dilation with cylinder oversizing
  • Long-indwelling catheter against the cylinder
  • Prior glanular or urethral surgery reducing local vascular supply
  • Poorly fitted rear-tip extenders creating distal cylinder pressure

Management:

  • Confirmed distal erosion through the glans: cylinder explantation on the affected side; contralateral cylinder may be retained or explanted depending on the scenario. The glans is allowed to heal 3–6 months before considering reimplantation.
  • Urethral erosion: complete device explantation, primary urethral repair if feasible (vs. marsupialization / urethrostomy), Foley drainage, delayed reimplantation 3–6 months after complete healing.
  • Counseling: honest disclosure that reimplantation is associated with a meaningfully higher rate of re-erosion, particularly in the radiated or severely diabetic patient.

Pump erosion​

Less common than cylinder erosion; presents as tender, erythematous scrotal skin tenting or frank erosion. Risk factors include thin scrotal tissue, radiation, and pump migration up against a poorly-dependent scrotal pocket.

Management: pump explantation, wound care, delayed reimplantation.

Reservoir erosion into the bladder​

Rare but severe. Presents as hematuria, cystitis-like symptoms, device deflation, or findings on cystoscopy. Managed with reservoir explantation, cystorrhaphy, Foley drainage, and delayed reimplantation — see reservoir placement.

Extrusion at the wound​

Cylinder or tubing visible through a wound dehiscence. Usually managed by explantation and delayed reimplantation; simple debridement and closure over exposed device rarely succeeds.

Glans Ischemia and Necrosis​

Clinical picture​

Glans pallor, cyanosis, or frank necrosis, typically evident within 24–72 hours of surgery, occasionally delayed to 7–14 days. May involve partial glans (dorsal tip pallor) or the entire glans.[4]

Mechanisms​

  • Distal cylinder oversizing — mechanical compression of glans vasculature
  • Dorsal neurovascular bundle injury — partial or complete transection during dissection (higher risk in infrapubic and subcoronal approaches)
  • Glans crossover — cylinder perforating the glans or crossing the midline through the septum
  • Aggressive distal dilation — direct arterial injury
  • Preexisting glans hypovascularity — diabetes, smoking, prior glans surgery, vasculopathy
  • Hematoma compressing the glans from within

Management​

  • Immediate recognition is critical. If detected within hours of surgery, deflation of the device may partially restore glans perfusion; partial or complete device explantation may be required if the ischemia progresses.
  • Hyperbaric oxygen therapy — described in case series as a salvage option for early glans ischemia; 100% oxygen at 2–3 ATA for 1–2 hour sessions, repeated over 7–14 days
  • Warm compresses, topical nitroglycerin — adjuncts with limited evidence
  • Explantation of the ischemic-side cylinder — if demarcation progresses
  • Glans debridement / partial amputation — only if necrosis is established and unsalvageable; the patient should be aware of the cosmetic consequences

Prevention​

  • Careful distal corporal dilation to — not through — the subcoronal recess
  • Preservation of the dorsal neurovascular bundle in infrapubic and subcoronal approaches
  • Appropriate cylinder sizing with intraoperative measurement
  • Postoperative glans assessment at the end of the case and again at 2 hours and 24 hours

Cylinder Aneurysm​

Definition​

Focal bulging or ballooning of the cylinder wall, visible and palpable during inflation. The cylinder shell has developed a weak point where fluid pressure expands the wall beyond its original contour.

Presentation​

Patient notices an abnormal asymmetry or focal bulge during erection. May be painful. Most commonly reported several years after implantation in heavily cycled devices.

Management​

Cylinder replacement (isolated cylinder exchange, or complete device replacement if other components show wear). Aneurysms do not resolve and progressively enlarge; delaying revision is not advantageous.

Prevention​

Appropriate cylinder sizing; avoidance of overly aggressive inflation during patient use; modern cylinder materials have reduced aneurysm rates significantly compared with earlier generation devices.

Mechanical Failure​

Rates​

  • Approximately 15% mechanical failure by 5–11 years
  • Approximately 50% overall revision rate by 10–15 years for contemporary devices
  • Coloplast Titan and AMS 700 have comparable long-term mechanical reliability in most reported series

Failure modes​

  • Cylinder tubing disconnection or rupture — fluid loss; device does not inflate
  • Reservoir-to-pump tubing disconnection — device does not inflate, or inflates partially
  • Pump valve failure — fluid cycles asymmetrically; device does not deflate fully
  • Cylinder shell rupture — progressive aneurysm → rupture; loss of inflation
  • Reservoir leak — gradual deflation over weeks to months
  • Autoinflation lock-out valve failure — older devices without lock-out valves cycle passively during Valsalva; modern devices have largely solved this

Management​

  • Complete mechanical workup: imaging (ultrasound of pump, x-ray of reservoir with contrast in selected cases), direct test of each component
  • Isolated component replacement vs. complete device exchange is a judgment call; many surgeons replace the entire device after 10+ years of service rather than risk second failures of non-exchanged components

Urinary Retention​

Incidence​

Approximately 5–6% of patients require postoperative catheterization for retention, usually within 24–48 hours of surgery.[2]

Causes​

  • Narcotic analgesics
  • Local edema near the bladder neck
  • Prior BPH or mild BOO revealed in the perioperative period
  • Reservoir compression (usually mild, rarely the primary cause)

Management​

  • Intermittent catheterization (one or two insertions usually sufficient)
  • Short-course alpha-blocker (tamsulosin 0.4 mg daily × 7–14 days) for BPH-background patients
  • Rarely requires prolonged catheter drainage

Hematoma​

Scrotal hematoma​

Most common early complication location. Rates 0.5–2% in modern series with fibrin sealant protocols; higher without.

  • Compressive scrotal dressing is standard
  • Partial device inflation for 24 hours to 2 weeks reduces dead space and is used by many implanters for hematoma reduction
  • Fibrin sealant (Tisseel, Evicel) applied at closure is supported by recent prospective data for hematoma reduction[5]
  • Drain placement is not recommended — associated with higher infection rates

Pelvic hematoma​

Associated with infrapubic approach or difficult reservoir placement; typically self-limited. CT imaging if concern for ongoing bleeding or expanding hematoma.

Management​

  • Small/stable: observation, compressive dressing, ice, appropriate analgesia
  • Large / expanding / infected: operative evacuation, reassessment of bleeding source, device evaluation

Chronic Pain​

Persistent pain beyond 6 weeks postoperatively is reported in approximately 5–10% of patients and ranges from mild (activation-only pain) to severe (daily pain with device inactivity).

Causes​

  • Inadequate distal cylinder seating → glans pain with inflation
  • Pump or reservoir positioning causing neuralgia or dartos irritation
  • Chronic corporal inflammation / sterile bursa formation around components
  • Unrecognized Peyronie's disease with incomplete correction
  • Psychological pain amplification

Management​

  • Expectant management for mild pain — most improves over 6–12 months
  • Pump or cylinder repositioning for component-localized pain
  • Pudendal nerve block as a diagnostic / therapeutic maneuver in selected cases
  • Device exchange or explantation in refractory cases — a difficult conversation, but ultimately the right answer for the patient whose pain does not resolve

Sensory Changes​

Rates and mechanism​

  • Infrapubic approach carries the highest sensory-change risk — the dorsal neurovascular bundle is in the direct dissection field
  • Penoscrotal approach has the lowest rate — the dorsal bundle is not routinely exposed
  • Subcoronal approach carries moderate risk — the bundle is exposed during degloving but visible throughout

Subjective sensory changes are reported in 2–10% of cases depending on approach and series. Complete sensory loss is rare (<1%).

Management​

  • Counseling preoperatively about the risk
  • Expectant management — most improve over 3–12 months
  • Refractory complete sensory loss has no effective surgical solution

Penile Shortening​

Subjective shortening is reported by up to 30% of patients regardless of device or approach. Objective shortening (measured) is usually small (0.5–1 cm). The perceived discrepancy between subjective complaint and objective measurement is substantial, and the preoperative measurement and counseling is the most protective intervention.

Addressed by​

  • Length-expanding cylinder (AMS 700 LGX) — the only device with longitudinal expansion
  • Preoperative traction therapy (vacuum device, penile traction device) — limited evidence but used by some practices
  • Adequate corporal dilation to maximal stretched length at primary implant
  • Early implant after priapism — avoids fibrosis-associated shortening

The Counseling Framework for Complications​

Effective consent discussion frames complications in three groups the patient can understand:

  1. Things that resolve on their own (most hematomas, most pain, most retention, most sensory change)
  2. Things that require another operation (mechanical failure, autoinflation, malposition, cylinder aneurysm, most infections)
  3. Things that end the implant journey for this patient (severe erosion with irreparable tissue loss, profound glans necrosis, unsalvageable infection with multiple failed salvage attempts)

Approximately 50% of patients will need at least one revision in their lifetime. Framed properly, the revision conversation is part of the normal device lifecycle, not a signal of surgical failure.

Documentation After Complications​

Every non-routine postoperative event should generate a note that captures:

  • Date of primary operation, device details (manufacturer, model, size, RTE)
  • Date of presentation and clinical findings
  • Imaging and labs obtained
  • Decision and treatment provided
  • Patient-expressed concerns in their own words
  • Plan and follow-up interval

The medicolegal threshold for prosthetic urology complications is high. Contemporaneous documentation of adequate informed consent, standard-of-care technique, timely recognition, and appropriate management is protective.

See Also​

References​

1. Van Renterghem K, De Bruyn H, Yebes A, et al. Early complications after penile prosthesis surgery: findings from the PHOENIX multicenter registry. Int J Impot Res. 2025. doi:10.1038/s41443-025-01080-z

2. Cocci A, Capogrosso P, Minhas S, et al. Penile prosthesis implantation: a systematic review of intraoperative and postoperative complications. Int J Impot Res. 2025. doi:10.1038/s41443-025-01108-4

3. Sidhu AS, Wayne GF, Kava BR. Management of penile prosthesis cylinder erosion. Curr Urol Rep. 2018;19(8):60. doi:10.1007/s11934-018-0813-0

4. Garber BB, Bickell M. Glans ischemia after penile prosthesis implantation. Urol Case Rep. 2017;12:28–29. doi:10.1016/j.eucr.2017.01.011

5. Fathollahi A, Razdan S, Razdan S. Zero infection protocol in inflatable penile prosthesis surgery: a prospective cohort study using chlorhexidine-alcohol skin preparation and fibrin sealant hemostasis. Int J Impot Res. 2025. doi:10.1038/s41443-025-01174-8