Penile Enlargement: Surgical & Procedural Overview

Patient Selection & Psychological Considerations

Procedures for Penile Length Enhancement

1. Suspensory Ligament Release (Ligamentolysis)

• Gain: 1–3 cm in flaccid length; minimal erect length gain
• Key limitation: Does not create new erectile tissue — it advances existing tissue
• Complications: Loss of penile support angle during erection, hematoma, scarring, reduced ability to achieve upward erection
• A pubic fat pad reduction (lipoplasty) is often performed simultaneously to maximize apparent length

2. V-Y and Z-Plasty Skin Advancement

3. Ventral Phalloplasty / Scrotoplasty

4. Sliding Elongation of the Corpora Cavernosa

• Greater length gains but significantly higher complication rates including erectile dysfunction

5. Penile Disassembly / Total Phalloplasty

Procedures for Penile Girth Enhancement

1. Hyaluronic Acid (HA) Filler Injection

• Gain: 1–2 cm increase in circumference
• Duration: 12–18 months; requires re-treatment
• Complication rate: ~4.3% — subcutaneous nodules, bruising, infection; rare allergic reactions
• Dissoluble with hyaluronidase if complications occur — a key safety advantage

2. Autologous Fat Grafting

• Gain: ~3–4 cm circumference increase when used as surgical grafts
• Limitation: Resorption rates are unpredictable (months to years); complications include irregular fat nodules, skin deformity, scarring, and "scrotalization" (penile skin migrating scrotal appearance)
• Injected fat has largely fallen out of favor; dermal fat grafts have fewer complications

3. Scrotal Dartos Flap (Scrotal Flap Method)

• Gain: ~3.59 ± 0.80 cm girth increase — among the largest reported for any technique
• No serious adverse events (fibrosis, flap infection) reported at 6-month follow-up in published series

4. Penuma® Silicone Implant

• Available in three sizes (14, 16, 18 cm)
• Implanted via subpubic or penoscrotal incision, placed superficial to Buck's fascia
• Provides permanent girth enhancement
• Complication profile includes implant removal rates, infection, and fibrosis

5. Acellular Dermal Matrix (ADM) / Allograft Grafting

• ADM combined with prostaglandin E showed mean girth gain of 1.1 cm but high complication rates in one study (47/78 patients had erectile discomfort), suggesting it is not an ideal standalone approach

6. Biodegradable Scaffolds / Tissue Engineering

Phalloplasty (Reconstructive / Gender-Affirming)

• Transmen (female-to-male gender-affirming surgery)
• Penile agenesis, traumatic loss, or severe micropenis

• Minor complication rate: 17–35%
• Major complication rate (urethral fistula, stenosis, flap necrosis): 7–15%

Summary of Evidence & Cautions

Topical Corticosteroids

Mechanism of Action

1. Anti-inflammatory — suppress prostaglandins, leukotrienes, and cytokines
2. Antiproliferative — reduce keratinocyte turnover
3. Immunosuppressive — inhibit T-cell mediated reactions
4. Vasoconstrictive — reduce erythema and oedema

Potency Classification

US System (7 Classes)

UK/European System (4 Classes)

Vehicle matters: The same molecule can span two potency classes depending on formulation. Ointments > creams > lotions > gels for penetration and potency.

Common Clinical Indications

Formulation Guide

• Ointment: Most potent, best for dry/lichenified skin; not suitable for wet/infected or hairy areas
• Cream: Versatile, suitable for moist and flexural areas
• Lotion/solution: Best for scalp and hairy areas
• Gel: Scalp; note propylene glycol base can irritate and dry skin
• Foam: Scalp psoriasis; cosmetically acceptable
• Shampoo: Scalp conditions with wash-off use

Site-Based Prescribing Rules

Duration Guidelines

Adverse Effects

Local (with prolonged or inappropriate use)

• Skin atrophy — thinning, fragility, telangiectasia
• Striae — irreversible, especially in flexures
• Acneiform/rosacea-like eruption — especially facial use
• Perioral dermatitis
• Hypopigmentation
• Hypertrichosis
• Infection potentiation/masking — tinea incognita, bacterial, herpetic, molluscum; granuloma gluteale infantum (diaper area in infants)
• Tachyphylaxis — loss of efficacy with continuous use; address by rotating or taking breaks

Systemic (rare; high-potency, large surface area, prolonged use)

• HPA axis suppression — especially Class I agents; can cause adrenal insufficiency
• Cushing syndrome — reported with >50 g/week of clobetasol propionate or >500 g/week hydrocortisone
• Growth retardation — children receiving large quantities of potent agents

Topical Steroid Withdrawal (TSW)

Allergic Contact Dermatitis

Pregnancy & Special Populations

• Mild–moderate TCS in pregnancy: No significant risk to mother or fetus based on available evidence
• High-potency TCS in pregnancy: Small but real association with low birth weight — avoid over large areas or prolonged courses
• Paediatrics: Risk of systemic absorption is proportionally greater (higher body surface-to-weight ratio); prefer mild potency; avoid occlusion

Practical Prescribing Tips

1. Fingertip unit (FTU): One FTU (≈0.5 g) covers an area equal to two adult palms
2. Steroid ladder: Start with an appropriate potency for the site and severity — don't automatically start mild everywhere
3. Step down: Once controlled, reduce to lowest effective potency and consider intermittent ("weekend") dosing for maintenance
4. Emollients: Apply TCS to the lesion; emollient on uninvolved skin. Allow a few minutes between the two
5. Combination products (TCS + antifungal): Useful for conditions where secondary candidal/dermatophyte infection is likely (e.g. flexural eczema)

Topical Testosterone

Why Topical? — Pharmacokinetic Rationale

The patch (red) produces smooth, stable levels within the normal range. IM injection (blue) causes supraphysiological peaks then troughs — Lippincott Illustrated Reviews: Pharmacology

Available Topical Formulations

Gels

• Bioavailability: Only ~10% of applied dose is absorbed over 24 hours
• Dose range: 25–100 mg/day depending on serum levels
• Titrate based on pre-dose morning serum testosterone at ~14 and 28 days after starting

2% Solution

• Axilla has high skin permeability and significant 5α-reductase activity
• Concealable application site

Transdermal Patches

• Patches are associated with skin irritation and contact dermatitis in a proportion of users; local cortisone cream can alleviate irritation
• Rotate sites to reduce chronic skin reactions

Nasal Gel

• Advantages: Rapid onset, short half-life, no transfer risk to partners/children
• Disadvantages: Requires dosing up to 3×/day; nasal irritation possible

Indications

1. Primary hypogonadism (congenital or acquired — e.g. Klinefelter syndrome, orchiectomy, cryptorchidism)
2. Hypogonadotropic hypogonadism (congenital or acquired — e.g. pituitary/hypothalamic disease)
3. Gender-affirming hormone therapy in transgender men — starting dose typically 50 mg/day gel, titrated
4. Limited evidence for lichen sclerosus — topical testosterone cream may benefit loss of sexual sensitivity (Berek & Novak's Gynecology)
5. Cirrhosis-related gonadal dysfunction — topical testosterone may improve muscle strength and survival in selected patients (Sleisenger & Fordtran's GI and Liver Disease)

Contraindications

• Known or suspected prostate cancer or breast cancer in men
• Pregnancy (absolute contraindication; androgens are teratogenic)
• Women (not indicated; risk of virilisation)
• Severe hepatic impairment (Child-Pugh C)

Monitoring

Adverse Effects

Local

• Skin irritation, erythema, pruritus at application site
• Contact dermatitis (patches > gels)
• Acne at application site

Systemic

⚠️ Secondary (Transfer) Exposure — Black Box Warning

• Wash hands immediately after application
• Cover the site with clothing once dry
• Wash the application site with soap and water before anticipated skin-to-skin contact

Testosterone Therapy and Fertility

• Clomiphene citrate (SERMs to stimulate endogenous production)
• hCG ± FSH injections (for hypogonadotropic hypogonadism)
• Rather than exogenous testosterone

Topical Testosterone for Penis Enlargement

The Short Answer

Where It Does Work: Micropenis (Hypogonadal States)

Mechanism

Evidence

• Mean +60% increase in penile length
• Mean +52.9% increase in penile girth

"Studies have shown that topical application of 5% testosterone cream causes increased penile growth, but its effect is due to absorption of the hormone, which systemically stimulates genital growth."

Clinical Protocol (Micropenis)

• Goal: Provide sufficient testosterone to stimulate penile growth without premature epiphyseal closure
• Regimen: Testosterone enanthate 25 mg IM every 3 weeks × 4 doses is standard; transdermal testosterone has also been used
• Monitoring: Stretched penile length (pubis to glans) before and after each course; bone age X-ray to monitor epiphyseal status
• Timing: Therapy should begin by age 1 year; repeat courses may be needed as child grows
• In boys with micropenis treated with testosterone at birth and puberty, final stretched penile length averaged 10.3 cm (within normal range in all 8 cases reported) — Campbell-Walsh-Wein Urology

In Normal Adult Men

1. Penile growth requires open androgen-sensitive growth pathways — these are active in fetal development, infancy, and puberty, but are largely closed in adults
2. Penile length in adults has only a weak correlation with circulating testosterone levels (r=0.22 in one study) — and this reflects developmental exposure, not current levels
3. The Translational Andrology and Urology study explicitly states: "A weak association between adult testosterone levels and penile length does not mean that men with higher testosterone levels have larger penises and by no means suggests that exogenous testosterone or testosterone replacement therapy will increase penile length"
4. The Mayo Clinic notes that testosterone-containing "pills and lotions" marketed for enlargement have not been proved to work and may be harmful
5. The AUA and Urology Care Foundation do not endorse topical testosterone for penile enlargement in normal adult men

Summary

Non-Surgical Penile Enlargement: What the Evidence Shows

1. Penile Traction Devices (Extenders)

• In one trial of 23 patients using a penile stretching device, mean flaccid length increased from 8.8 cm to 10.5 cm at 3 months. No significant girth improvement.
• A second study of 54 patients using traction 6 hours/day for 4 months showed significant increases in flaccid, stretched, and erect length at 6-month follow-up.
• The BJU International systematic review (2021) classified traction therapies as "mostly efficacious and safe"
• No adverse effects reported in published trials when devices were used as instructed

2. Hyaluronic Acid (HA) Filler Injection

• Girth increase: Consistently ~1–2 cm circumference gain
• A 2023 meta-analysis (Kusumaputra et al., PMID 37663705) of 283 patients found HA significantly superior to polylactic acid for penile girth enhancement (p=0.01) and sexual satisfaction at 12 weeks (p=0.0004)
• Complication rate ~4%: subcutaneous nodules, bruising, minor infection — all manageable
• Key safety advantage: Reversible — complications can be dissolved with hyaluronidase
• Duration: 12–18 months; repeat treatment required

3. Polylactic Acid (PLA) Filler Injection

• Less effective than HA for girth increase in head-to-head comparisons
• Longer-lasting but not reversible — disadvantage compared to HA if complications occur
• Similar complication rates to HA

4. Vacuum Erection Devices (VED / Pumps)

• Increases penile size temporarily only — effect reverses within ~30 minutes
• No permanent enlargement in normal men
• Best evidence for use post-surgery (e.g. post-penile prosthesis, post-prostatectomy) to maintain penile length and prevent fibrosis
• Used excessively or incorrectly, VEDs can cause bruising, petechiae, and damage to elastic tissue → less firm erections over time

5. Jelqing (Manual Stretching/Milking Exercises)

6. Pills, Supplements, and Herbal Products

7. Pubic Fat Pad Reduction (Lifestyle / Body Composition)

Summary Table

Bottom Line

1. Penile traction devices — for modest length gains with sustained daily use
2. HA filler injections by a qualified clinician — for temporary girth enhancement