Mang Chen

GenitoUrinary Reconstructive Surgeon

[Mang Chen @mangchenmd]

Coloplast Titan fill volumes (for both cylinders). Volume is halved for single cylinder use in phalloplasty.

14 cm 40cc
16 cm 50cc
18 cm 60cc
20 cm 70cc
22 cm 90cc
24 cm 110cc
26 cm 120cc

[Mang Chen @mangchenmd]

Long-term outcomes for primary IPP insertion after phalloplasty (London 2026)

N=694; 9/2001 to 7/2024
▶️RF phallus 506/694
▶️Infection: 69/694
▶️Mech fail: Boston 30%, Coloplast 12%
▶️Overall revision: 40% 5 yrs; 56% 10yrs; 65% 15yrs
https://t.co/XOlYG99lBJ

[Mang Chen @mangchenmd]

Perioperative Antimicrobial Strategies in Inflatable Penile Prosthesis Surgery

Multicenter retrospective study 5261 patients
▶️Infection rate 1.9%
▶️Antifungal use lowers risk
▶️Postop abx > 24 hrs no benefit
⏩Use antifungal; question postop abx > 24 hrs
https://t.co/uKeRzJlSYK

[Mang Chen @mangchenmd]

Multicenter Analysis of Long-Term Outcomes of AUS After Urethroplasty

▶️178 patients (17 surgeons)
▶️Complications: explant, erosion, infection, atrophy, mech failure
▶️Prior transecting Uplasty 56% | nontransecting 24%
⏩AUS risk higher in patients who had transecting urethroplasty

https://t.co/mdMsIfv9QM

[Mang Chen @mangchenmd]

Rates of infection of hydrophilic IPPs (inflatable penile prostheses) using 0.05% CHG (chlorhexidine gluconate)

▶️14 institutions, 2150 IPPs
▶️Infections: CHG 4.6%, Abx 2.1%
⏩CHG use increases infection risk of hydrophilic IPPs
https://t.co/15bXqBi25m

[Mang Chen @mangchenmd]

ZSI475 (IPP) and ZSI100 (MPP) outcomes (Amsterdam 2025)

▶️50 patients, 85 implants (66 IPPs; 19 MPPs)
▶️Median followup 26mos IPPs, 32mos MPPs
▶️Infection: IPP 15%, MPP 11%
▶️Revision 56%
⏩Poor 3-yr complication free survival: 39% IPPs and 31% MPPs
https://t.co/YjYtTrwrAh

[Mang Chen @mangchenmd]

London Staging of RFFF phalloplasty:

▶️ Stage 1: RFFF phallus, pars pendulans (PP) from RFFF matured to labial skin after resection of minora projection
▶️Stage 2: pars fixa (PF) from vaginal + labial flaps | PF-PP anastomosis | glansplasty | scrotoplasty | vaginectomy

[Mang Chen @mangchenmd]

London Staged RFFF phalloplasty urethral outcomes 2010

▶️ N = 115: 3 phallus loss | 84 PF and PP urethroplasty |
▶️31 PP urethroplasty only
▶️Median followup 26 months (1998-2008)
▶️Fistulas 20
▶️Strictures 9
⏩Revisions 29/84 (35%)
https://t.co/yrcBYnbl8V

[Mang Chen @mangchenmd]

ALT Phalloplasty UL (Ghent 2019)

N | UL type (Urethral complication %):
▶️5 | tube-in-tube (20)
▶️8 | prelaminated STSG (87.5)
▶️29 | RFFF (37.9)
▶️38 | SCIP flap (26.3)
▶️6 | skin flap prior phallo (16.7)
https://t.co/t2vPdE7DUq

[Mang Chen @mangchenmd]

Combination Flap Phalloplasty in Transmen: pedicled ALT phallus, free flap RF urethra (Amsterdam 2017)

▶️ N = 19 (38 flaps 2008-2015)
▶️Median followup 35 months
▶️RF flap failure 2
▶️ALT flap failure 1
▶️Urologic complications 10 (53%)
https://t.co/ogR28duKoE

[Mang Chen @mangchenmd]

Large volume Musculocutaneous Lattissimus Dorsi Phalloplasty study

▶️N = 129
▶️Mean followup 43 months
▶️1 partial and 2 total flap necrosis
▶️UL to proximal 1/3 or midshaft of penis in 91%
▶️Fistulas = 6; Strictures = 2
https://t.co/cuZ16aPW94