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History of Urethral Surgery

The history of urethral surgery spans more than three millennia — from reed catheter dilations by Ayurvedic surgeons in ancient India to robotic-assisted urethroplasty in the 21st century. Its arc traces humanity's long struggle against urethral stricture disease, hypospadias, and traumatic injury, punctuated by the contributions of polymaths, military surgeons, and — in the modern era — a handful of dedicated reconstructive urologists who transformed a craft of desperation into a discipline of precision.

Ancient and Classical Period (Pre-600 AD)​

Ancient India — The Ayurvedic Tradition (~600 BC)​

The earliest known treatment for urethral stricture disease is attributed to Sushruta (Suśruta), the foundational figure of Ayurvedic surgery, active around 600 BC. Sushruta described urethral dilation using reed catheters lubricated with ghee — the first documented management of lower urinary tract obstruction. His work, preserved in the Sushruta Samhita, establishes India as the cradle of urological surgery.[1]

Ancient Egypt (~1550 BC)​

The Ebers Papyrus (c. 1550 BC) records urological treatments dating to earlier millennia. Urethral probes and dilators fashioned from wood, plant stalks, feathers, and papyrus rolls were employed for instrumentation of the lower urinary tract. Copper instruments for urethral calibration have been documented archaeologically. Lead and bronze urethral dilators from the last century BC have been recovered from Roman sites in France, suggesting that the techniques spread broadly through the ancient world.[2]

Ancient Greece​

Aristotle (4th century BC) provided the first clinical description of hypospadias. Erasistratus (c. 200 BC) developed the elongated S-shaped metal catheter for stricture treatment — a design that remained standard for centuries. Epicurus (341–270 BC) is cited historically as having reportedly ended his life when he could no longer dilate his urethral stricture.

Heliodorus (1st–2nd century AD), Alexandrian surgeon, gave the first detailed surgical description of hypospadias repair: a circumferential oblique amputation distal to the ectopic meatus, with hemorrhage controlled by vinegar-soaked bandages and cauterization. He distinguished balanic, penile, and perineal-scrotal variants, declaring only the balanic form surgically treatable. Antyllus (2nd century AD) described the same technique, adding that amputation does not impair fertility since "the glans does not reach the cervix of the uterus."[3]

Galen (c. 130–201 AD) coined the term hypospadias from the Greek hypo (under) and spadon (rent or tear). He recommended stretching and suturing for glanular hypospadias rather than amputation, and recognized penile curvature (chordee) as a functionally significant complication. Recent manuscript translations reveal Galen was more conservative in his operative recommendations than previously reported.[3]

Ancient Rome​

Aulus Cornelius Celsus (25 BC–50 AD), in De Medicina, described external urethrotomy for a stone impacted behind a urethral stricture — the first clear surgical description of a urethrotomy procedure. Paul of Aegina (c. 625–690 AD) continued the classical tradition of hypospadias description and classification.

Medieval Period (600–1500 AD)​

Arab physicians — including Haly Abbas and Constantine the African (c. 1015–1087) — preserved Greco-Roman technique through the medieval period when European surgical practice stagnated. The transmission of Greek surgical knowledge through Arabic scholarship set the stage for Renaissance rediscovery.

The first documented gonorrhea epidemic in the 16th century dramatically renewed European attention to urethral stricture disease. Historical anecdote holds that both Henry IV of France and Napoleon Bonaparte suffered from gonococcal strictures.[1]

The Renaissance: Ambroise Paré (1510–1590)​

Ambroise Paré, the French surgeon regarded by many historians as the father of modern surgery, revived urethral surgery in France after it had fallen out of practice. He invented instruments for scraping "carnosities" (abnormal tissue growths) from the urethra — an early endourethral debridement concept. He also devised tubular silver catheters with long gentle curves (coudé-type) to permit easier passage around the prostatic angle. His philosophy of operating gently to minimize pain was transformative for 16th-century surgical culture.[4]

17th and 18th Centuries​

The Lanceolate Catheter (1795)​

A silver catheter from which a cutting blade could be protruded to stab through a stricture was introduced in 1795 — an early form of internal urethrotomy performed without direct visualization.

John Hunter (1728–1793)​

Scottish-born London surgeon and founder of pathological anatomy in England, John Hunter specialized in venereal disease and stricture. He applied silver nitrate to open urethral strictures (1752), performed perineal urethrotomy at St. George's Hospital (1783), and was the first to map the incidence of stricture by anatomical location — identifying the bulbar urethra as the most commonly affected site.[5]

The 19th Century: The Classical Era of Stricture Surgery​

Jean Civiale (1792–1867) and Internal Urethrotomy​

Jean Civiale, Parisian physician and pioneer of endoluminal urology, invented the first practical internal urethrotome in 1817. He is also a key figure in the development of lithotrity (non-surgical bladder stone treatment).[6]

Maisonneuve (1848)​

Jean-Gilles Maisonneuve improved the internal urethrotome by adding a filiform guide, enabling safer passage through tight strictures. His blind internal urethrotome, alongside the later Otis instrument, remained in clinical use for over a century.

Sir Henry Thompson (1820–1904)​

Born in Framlingham, Suffolk, Sir Henry Thompson is widely considered "the first British Urologist" for the singular dedication of his practice to genitourinary conditions. In 1852, he won the Jacksonian Prize at the Royal College of Surgeons for his essay on urethral stricture. His 1854 monograph — The Pathology and Treatment of Stricture of the Urethra (4th ed. 1885) — was the definitive Victorian reference text. He treated King Leopold of Belgium's bladder stone in 1863 using lithotrity, earning international fame and a knighthood. He learned lithotrity directly from Civiale in Paris.[7]

Carl Thiersch and the Tubularization Principle (1869)​

Carl Thiersch (1822–1895), German surgeon, described tubularization of local penile skin in situ for repair of epispadias in 1869 — the first systematic description of urethral reconstruction by tubularization of adjacent epithelium. This principle was extended to hypospadias repair by Duplay five years later, and remains the foundation of modern urethral plate urethroplasty.[8]

Simon Duplay (1874 and 1880)​

Simon Duplay (French surgeon) described tubularization of the urethral plate distal to the urethral orifice for hypospadias repair in 1874 — achieving his first success across five stages. By 1880, he had observed that the urethral plate could tubularize over a catheter without complete sutured closure, foreshadowing the buried-strip technique. He is credited with naming and systematically describing "hypospadias périnéo-scrotal." The Thiersch-Duplay principle became the conceptual ancestor of all subsequent urethral plate tubularization procedures, including the modern TIP (Snodgrass, 1994).[8]

Fessenden N. Otis and the Urethrameter (1872/1876)​

Fessenden N. Otis (1825–1900), American surgeon at the New York College of Physicians and Surgeons, developed the urethrameter (a calibrating instrument for determining sound size) and described the Otis urethrotome — a dilating instrument with an internal blade cutting at the 12 o'clock position after the stricture was dilated to the desired caliber. First described c. 1872 with refined publications c. 1875–1876. The Otis urethrotome remained in routine use until the endoscopic era and is still employed today for long-segment or female urethral strictures.[9]

First Use of Oral Mucosal Grafts: Sapezhko (1894)​

Sapezhko (1894) is credited with the first reported use of oral mucosa for urethral surgery — the earliest conceptual ancestor of modern buccal mucosal grafting. The technique was not adopted and was forgotten for nearly a century. Tyrmos (1902) applied oral mucosal grafts for urethral fistula repair, the second recorded use.[10]

Early 20th Century (1900–1950)​

Marion and Heitz-Boyer — Excision and Primary Anastomosis (1911)​

G. Marion and M. Heitz-Boyer published the first systematic report of urethral repair by end-to-end suture with immediate urinary diversion in 1911 (Bulletin de l'Association Française d'Urologie). This established the conceptual basis for excision and primary anastomosis (EPA) urethroplasty — still considered the gold standard for short-segment bulbar strictures today.[11]

Hamilton Russell (c. 1915)​

Hamilton Russell described the buried skin strip principle for urethroplasty — a technique Denis Browne later attributed to him as the originator. The concept of leaving an intact epithelial strip to epithelialize ventrally over a catheter without complete tubularization underpins both the Browne repair and, conceptually, the TIP procedure.[12]

G. Humby and Buccal Mucosa — First Modern Use (1941)​

G. Humby (1941), British surgeon, revived the use of oral mucosal grafting by harvesting buccal mucosa for urethral reconstruction in an 8-year-old with a failed hypospadias repair — the first modern documented use. The technique again fell largely out of favor and was not widely adopted for another half century.[10]

Mid-20th Century: The Staged Urethroplasty Era (1950–1975)​

Bengt Johanson and the Two-Stage Urethroplasty (1953)​

The single most transformative innovation in 20th-century urethral reconstruction belongs to the Swedish surgeon Bengt Johanson. In 1953, he published "Reconstruction of the male urethra in strictures: Application of the buried intact epithelium tube" (Acta Chirurgica Scandinavica, PMID 13324948). The technique:

  • Stage 1: The diseased urethra is opened ventrally and laid open as a skin-lined plate; scrotal or perineal skin covers the repair area
  • Stage 2 (2–6 months later): Retubularization and closure

Originally designed for hypospadias, Johanson rapidly extended it to urethral stricture management. In the period 1951–1974, urethroplasty by Johanson's principle was performed in 467 patients with complete repair in 391. He also proposed suprapubic cystostomy with delayed urethral repair for posterior urethral injuries from pelvic fracture — establishing the principle of staged management for traumatic urethral disruption. The two-stage approach remains the procedure of choice for complex strictures with lichen sclerosus, prior failed repairs, and severely compromised tissue beds.[13]

Denis Browne and the Buried Strip (1930s–1950s)​

Denis Browne, British pediatric surgeon at Great Ormond Street Hospital, London, popularized the buried skin strip (buried intact epithelium) principle for hypospadias repair. Though the concept traces to Duplay (1880) and Hamilton Russell (1915), Browne's advocacy and operative results spread the technique internationally. His forerunner buried-strip concept is the conceptual precursor to the modern TIP procedure.[12]

Direct Vision Internal Urethrotomy: Sachse (1971/1974)​

Hans Sachse (German urologist) introduced the sharp cold-knife urethrotome for optical (direct-vision) internal urethrotomy in 1971. His 1974 publication reported 69% success in 90 patients. The technique used a sharp blade under direct endoscopic visualization, avoiding the tissue necrosis associated with electrocautery. Sachse's cold-knife urethrotome became the world standard for endoscopic stricture treatment — replacing blind techniques and establishing DVIU as the first-line endoscopic procedure.[14]

The Modern Reconstructive Era (1960–2000)​

Richard Turner-Warwick (1925–2017)​

Richard Turner-Warwick is universally regarded as a founding father of modern reconstructive urology. His contributions span four decades:

  • 1960: Published "A technique for posterior urethroplasty" (J Urol, PMID 13839971)
  • 1973: Described one-stage bulboprostatic urethral anastomosis bridging defects up to 2.5 cm
  • 1976: Introduced the omental wrap to provide vascular and trophic support to transpubic bulboprostatic anastomosis — a technique that remains relevant in irradiated and complex pelvic reconstruction
  • Also described the scrotal inlay urethroplasty and multiple refinements to posterior urethral reconstruction

His perineal-abdominal transpubic urethroplasty became the gold standard for pelvic fracture urethral distraction defects in the 1970s–1980s.[15]

Waterhouse Transpubic Urethroplasty (1973)​

Waterhouse and colleagues (1973) described the combined abdomino-perineal transpubic approach: bilateral pubic bone division with a Gigli saw (wedge removal), perineal incision, bulbar urethral mobilization, and anastomosis to the prostatic urethra. Mean hospitalization was 28 days. The procedure was widely adopted before being gradually superseded by elaborated perineal approaches.[16]

Ahmad Orandi — Penile Skin Flap Urethroplasty (1968/1972)​

Ahmad Orandi described 10 cases of longitudinal ventral fasciocutaneous island penile flap urethroplasty in the British Journal of Urology in June 1968, with an expanded 21-patient series in the Journal of Urology in 1972. The Orandi flap, based on dartos fascia, became the most widely used one-stage procedure for anterior penile urethral strictures and remains the gold standard for non-obliterative penile strictures without lichen sclerosus.[17]

Blandy and Tresidder — Scrotal Flap Urethroplasty (1967/1968)​

John Blandy (1927–2012), British urologist at the London Hospital and later St. Bartholomew's, published "Urethroplasty by scrotal flap for long urethral strictures" in the British Journal of Urology in 1968 (PMID 4872409). The technique employed an inverted Y-shaped perineal incision with a mobile scrotal skin flap advanced to the bulbar urethra, based on dartos fascia vascularity. A 1971 series of 70 cases reported no recurrent strictures, incontinence, or impotence at median 3-year follow-up. Blandy also authored a landmark review on stricture management in the Postgraduate Medical Journal in 1980.[18]

Webster and Goldwasser — Elaborated Perineal Approach (1986–1991)​

Gerald Webster at Duke University refined the elaborated perineal approach for posterior urethral strictures. Webster and Ramon (1991) published repair of pelvic fracture posterior urethral defects using this approach — experience with 74 cases (PMID 2005693). Drawing on principles from Marion, Turner-Warwick, and Waterhouse, Webster's elaborated perineal approach became the dominant technique for pelvic fracture urethral distraction defects in the 1990s and remains the reference standard today.[19]

McAninch Circular Fasciocutaneous Flap (1985–1993)​

Jack McAninch (UCSF) first described reconstruction of extensive urethral strictures using a circular fasciocutaneous penile flap in 1993. Unlike the Orandi longitudinal flap, the circular technique could reconstruct strictures 8–21 cm in length. Initial results: no recurrence in 10 patients at 14 months. Long-term data: 87% success in 54 patients. McAninch and Morey later expanded this series, establishing the circular fasciocutaneous flap as the definitive option for extensive panurethral strictures.[20]

The Buccal Mucosa Revolution (1992–1996)​

The revival and establishment of buccal mucosal grafting (BMG) in the 1990s fundamentally changed anterior urethral reconstruction.

Burger et al. (1992) and Dessanti et al. (1992) independently reported buccal mucosa for urethral surgery. El-Kasaby et al. (1993) published the first adult clinical series for anterior urethral stricture repair using BMG.

Allen F. Morey and McAninch (1996) published a landmark series demonstrating the superiority of BMG for dorsal onlay graft urethroplasty — their technique of dorsal inlay/onlay placement (fixing the graft to the corporal bodies, spongiosum side outward) provided a richly vascularized graft bed and became the reference standard.[21]

The biological properties of buccal mucosa that make it ideal for urethral reconstruction:

  • Thick epithelium resistant to the wet urinary environment
  • Thin, highly vascularized lamina propria enabling rapid imbibition
  • Ready accessibility from the inner cheek
  • Minimal donor site morbidity

Buccal mucosal graft urethroplasty is now the most widely performed reconstructive procedure for anterior urethral strictures worldwide.

Guido Barbagli — Dorsal Onlay Urethroplasty (1995–1996)​

Guido Barbagli (Center for Urethral and Genitalia Reconstructive Surgery, Arezzo, Italy) introduced the dorsal onlay graft urethroplasty in 1995–1996, synthesizing Monseur's concept of dorsal urethrotomy with Devine's free graft technique. The Barbagli procedure for bulbar strictures:

  1. Lithotomy position; midline perineoscrotal incision
  2. Bulbar urethra completely mobilized and rotated 180°
  3. Urethra incised along its dorsal surface
  4. Graft (preputial skin or buccal mucosa) quilted to the tunica albuginea of the underlying corpora cavernosa
  5. The corpora serve as a richly vascularized graft bed, maximizing take

In Andrich and Mundy's (2001) landmark comparison, "The Barbagli procedure gives the best results for patch urethroplasty of the bulbar urethra" — 5% recurrence versus 14% with traditional ventral stricturotomy at equivalent follow-up (PMID 11564027).[25]

Barbagli subsequently described multiple refinements: fibrin glue in urethroplasty (2006); bulbospongiosus muscle and nerve-sparing bulbar reconstruction (2008); perineal urethrostomy with Blandy flap for panurethral disease (2010); and the dorsal Orandi skin flap modification for penile urethroplasty (2019). He also pioneered the MukoCell® tissue-engineered buccal mucosa product — reporting 86% success in a 2018 series. His published atlas and over 400 peer-reviewed papers make him the most prolific single contributor to modern urethral reconstructive literature.

Sanjay Kulkarni — One-Sided Anterior Urethroplasty (2009)​

Sanjay Kulkarni (Mumbai, India) described the "one-sided anterior urethroplasty" in 2009 — a technique specifically designed to address long-segment and panurethral strictures while preserving normal anatomy. The key innovation: dissection limited to one side of the urethra only, sparing the contralateral neurovascular supply, bulbospongiosus muscle, and perineal innervation on the intact side.[26]

Combined with penile invagination (the phallus pulled into the perineal field), Kulkarni's approach permits single-stage reconstruction of the entire anterior urethra using two dorsally placed oral mucosal grafts. Initial series: 24 patients, 92% success (22/24). The technique is particularly valuable for panurethral lichen sclerosus, where the entire anterior urethra may require reconstruction in one sitting.

Modern Hypospadias Surgery​

W.K. Snodgrass and Tubularized Incised Plate (TIP) Urethroplasty (1994)​

Warren K. Snodgrass (1994) introduced the Tubularized Incised Plate (TIP) urethroplasty — deepening the midline urethral plate with a relaxing incision, then tubularizing it over a stent. The procedure, building directly on the Thiersch-Duplay tubularization principle, achieved dramatically lower fistula rates than prior techniques and became the most commonly performed hypospadias repair worldwide for distal and midshaft variants.[22]

John Duckett — MAGPI and Preputial Island Flap (1980/1981)​

John Duckett (Children's Hospital of Philadelphia) described the MAGPI (Meatal Advancement and Glanuloplasty Incorporated) in 1981 for subcoronal hypospadias — advancing the meatus to the glans tip with a 1.2% overall complication rate. In 1980, he described the transverse preputial island flap for proximal hypospadias, raising the inner prepuce as a tubularized pedicle flap transposed ventrally — a widely adopted technique for one-stage proximal repair.[23]

Lichen Sclerosus and Urethral Stricture​

Stühmer (1928) described balanitis xerotica obliterans (BXO) as a post-circumcision phenomenon — the earliest recognition of lichen sclerosus (LS) affecting the male genitalia and urethra. The recognition that LS-associated strictures are resistant to BMG (owing to LS involvement of graft bed tissue) catalyzed interest in non-genital tissue sources and two-stage buccal repair strategies in the 2000s–2010s.

The Urolume Era and Lessons Learned (1987–2000s)​

The Urolume urethral stent, developed in 1985 and first used clinically in 1987–1988, offered an endoscopic alternative to open reconstruction for recurrent bulbomembranous strictures. Initial reports by Milroy et al. described 100% success in small series. Long-term follow-up revealed high failure rates (24–57% reoperation in various series), tissue ingrowth, stent migration, and difficulty of explantation. The Urolume experience became a cautionary tale against permanent endoluminal implants for stricture disease and ultimately led to device withdrawal.[24]

The 21st Century: Refinement, Robotics, and Regeneration​

The modern era has been characterized by:

  • Expanded indications for EPA: Recognition that EPA can be safely applied to strictures up to 2–3 cm with appropriate corporal splitting and bulbar mobilization (Andrich and Mundy, 2001; Morey and Kizer, 2006)
  • Non-transecting (vessel-sparing) EPA: Glenn Jordan (Eastern Virginia Medical School, 2007) introduced vessel-sparing excision and primary anastomosis (VS-EPA) — preserving the intrinsic vascular supply of the corpus spongiosum by not fully transecting it, potentially reducing erectile dysfunction and penile shortening. Andrich and Mundy (2012) published a non-transecting anastomotic bulbar urethroplasty in 22 patients (PMID 21933325), with 90–98% success rates comparable to transecting EPA and similar or improved erectile function outcomes.[27]
  • Robotic urethroplasty: First robotic-assisted bulbar urethroplasty reported by Musch et al. (2008); robotic posterior urethroplasty (RARP-UP) series published by Barbagli et al. and Lee/Eun (2020s) with outcomes comparable to open repair
  • Tissue engineering: Anthony Atala (Wake Forest Institute for Regenerative Medicine) demonstrated first human implantation of engineered urethral constructs seeded with autologous urothelial and smooth muscle cells (2011, Lancet, PMC4005887) — five boys with urethral defects; cells expanded and seeded onto tubularized PGA:PLGA scaffolds
  • Outcome standardization: The TURNS (Trauma and Urologic Reconstructive Network of Surgeons) multicenter registry has provided the largest prospective outcomes datasets in urethroplasty
  • Buccal graft optimization: Dorsal vs. ventral onlay, augmented anastomotic repair, and dorsally quilted grafting described by Barbagli, Kulkarni, Chapple, and Gelman
  • Scar modulation: Mitomycin C for recurrent bladder neck contractures (72–89% success); drug-coated balloon (DCB) dilation under active investigation (2020s); tacrolimus-eluting stents and botulinum toxin A in preliminary studies

Eponymous Procedures — Quick Reference​

EponymSurgeonYearTechnique
Thiersch-DuplayThiersch / Duplay1869/1874Urethral plate tubularization (epispadias → hypospadias)
Otis urethrotomeFessenden Otis1872/1876Blind internal urethrotomy instrument; 12-o'clock blade
Denis Browne repairDenis Browne1930s–50sBuried skin strip; covered epithelium hypospadias repair
Johanson urethroplastyBengt Johanson1953Two-stage staged urethral reconstruction
Sachse urethrotomyHans Sachse1971Direct-vision cold-knife DVIU — replaced all blind techniques
Turner-Warwick urethroplastyRichard Turner-Warwick1960–1976Posterior / transpubic reconstruction; omental wrap
Blandy urethroplastyJohn Blandy1968Scrotal flap for long anterior strictures
Orandi flapAhmad Orandi1968/1972Longitudinal ventral penile fasciocutaneous island flap
Waterhouse procedureWaterhouse et al.1973Combined abdomino-perineal transpubic urethroplasty
Webster elaborated perinealGerald Webster1986/1991Posterior urethral reconstruction via infrapubectomy; 74-case series
Duckett preputial flapJohn Duckett1980Transverse preputial island flap for proximal hypospadias
MAGPIJohn Duckett1981Meatal advancement and glanuloplasty; subcoronal hypospadias
McAninch circular flapJack McAninch1993Circular fasciocutaneous penile flap; strictures 8–21 cm
Barbagli procedureGuido Barbagli1995–1996Dorsal onlay BMG; graft quilted to tunica albuginea
Snodgrass / TIPWarren Snodgrass1994Tubularized incised plate; most common hypospadias repair
Kulkarni techniqueSanjay Kulkarni2009One-sided anterior urethroplasty; panurethral single-stage
Vessel-sparing EPAGlenn Jordan2007Non-transecting anastomosis; preserves spongiosal vascularity

References​

1. Historical overview of urethral stricture disease. strictureurethra.wordpress.com; International Journal of Urologic History (ijuh.org).

2. Attwater HL. "The history of urethral stricture." Br J Urol. 1943;15(1):39–51. [PMID: British Journal of Urology, historical archive]

3. Musitelli S. "The ancient history of hypospadias." Medical & Surgical Urology. 2016;5(4). [longdom.org]; Galen's clinical description reviewed in PMC3289703.

4. Paré A. Oeuvres Complètes. Paris, 1575. Historical review: PMC2605308; PubMed 12953722.

5. John Hunter biographical review. PMC: PubMed 2181924; apmcfmu.com. "Hunter JA: stricture of the urethra." Ann R Coll Surg Engl. 1983.

6. Civiale J. Historical contribution to lithotrity and internal urethrotomy. PMC6500724.

7. Thompson H. The Pathology and Treatment of Stricture of the Urethra. 4th ed. London, 1885. Biographical overview: history.uroweb.org; AUA Journals doi:10.1016/j.juro.2013.02.685.

8. Thiersch-Duplay tubularization principle. Springer reference chapter on history of hypospadias repair; PubMed 27989535.

9. Otis FN. "Stricture of the male urethra." New York College of Physicians and Surgeons. 1875–1876. Reviews: PubMed 1233173; PubMed 4417395; advinhealthcare.com.

10. Sapezhko (1894), Tyrmos (1902), Humby G (1941). Historical review of buccal mucosa grafting: Frontiers in Urology PMC12327277; strictureurethra.wordpress.com.

11. Marion G, Heitz-Boyer M. "Rétrécissements uréthraux." Bull Assoc Franc Urol. 1911. Historical review: Springer Historical Highlights chapter in urethral surgery.

12. Denis Browne repair historical review. PubMed 379370; PMC3326824; ScienceDirect S000712266580025X.

13. Johanson B. "Reconstruction of the male urethra in strictures. Application of the buried intact epithelium tube." Acta Chir Scand. 1953;176(Suppl):1–90. [PMID: 13324948]; PubMed 11275717.

14. Schultheiss D, Truss MC, Jonas U. "History of direct vision internal urethrotomy." Urology. 1998;52(4):729–734. [PMID: 9763106]; Sachse original: PubMed 505697.

15. Turner-Warwick R. "A technique for posterior urethroplasty." J Urol. 1960;83:416–419. [PMID: 13839971]; Eur Urol 2007 biographical review doi:S0302-2838(07)00907-4.

16. Waterhouse K et al. "Transpubic repair of membranous urethral strictures." J Urol. 1973. PMC4435923.

17. Orandi A. "One-stage urethroplasty: 4-year follow-up." J Urol. 1972. PubMed 31351018; BJUI journals reference.

18. Blandy JP, Tresidder GC. "Urethroplasty by scrotal flap for long urethral strictures." Br J Urol. 1968;40:261–267. [PMID: 4872409]; Blandy JP. "Urethral stricture." Postgrad Med J. 1980;56:383–418. [PMID: 6824865].

19. Webster GD, Ramon J. "Repair of pelvic fracture posterior urethral defects using an elaborated perineal approach: experience with 74 cases." J Urol. 1991;145(4):744–748. [PMID: 2005693].

20. McAninch JW, Morey AF. "Penile circular fasciocutaneous skin flap in one-stage reconstruction of complex anterior urethral strictures." J Urol. 1998. PMC4166375; PMC4668293.

21. Morey AF, McAninch JW. "When and how to use buccal mucosal grafts in adult bulbar urethroplasty." Urology. 1996;48(2):194–198. Frontiers review: PMC12327277.

22. Snodgrass W. "Tubularized incised plate urethroplasty for distal hypospadias." J Urol. 1994;151(2):464–465. [PMID: 8283543].

23. Duckett JW. "MAGPI (meatoplasty and glanuloplasty): a procedure for subcoronal hypospadias." Urol Clin North Am. 1981;8(3):513–519. PMC6498737.

24. Milroy EJ et al. "A new treatment for urethral strictures." Lancet. 1988;1(8600):1424–1427. [PMID: 2898624]. Long-term outcomes: PubMed 8583603; doi:S0090-4295(18)30447-3.

25. Barbagli G, Palminteri E, Guazzoni G, et al. "Bulbar urethroplasty using buccal mucosa grafts placed on the ventral, dorsal or lateral surface of the urethra: are results affected by the surgical technique?" J Urol. 2005;174(3):955–957. Andrich DE, Mundy AR. "The Barbagli procedure gives the best results for patch urethroplasty of the bulbar urethra." BJU Int. 2001;88(4):385–389. [PMID: 11564027]. Historical review: Barbagli G, Lazzeri M. "History and Evolution of Dorsal Onlay Urethroplasty." doi:10.1177/039156030707400407.

26. Kulkarni SB, Barbagli G, Sansalone S, Lazzeri M. "One-sided anterior urethroplasty: a new dorsal onlay graft technique." BJU Int. 2009;104(8):1150–1155. doi:10.1111/j.1464-410x.2009.08590.x.

27. Andrich DE, Mundy AR. "Non-transecting anastomotic bulbar urethroplasty: a preliminary report." BJU Int. 2012;109(7):1090–1094. [PMID: 21933325]. Jordan GH, Eltahawy EA, Virasoro R. "The technique of vessel sparing excision and primary anastomosis for proximal bulbous urethral reconstruction." J Urol. 2007;177(5):1799–1802.