Marjan Waterloos

Dr. Marjan Waterloos


Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 September 2021 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
MWMichel Wirtz
Michel Wirtz
WCWietse Claeys
Wietse Claeys
PFPhilippe Francois
Philippe Francois
MWMarjan Waterloos
Marjan Waterloos
MWMieke Waterschoot
Mieke Waterschoot
NLNicolaas C. Lumen
Nicolaas C. Lumen
Background: To report on the use of oral mucosa graft urethroplasty for meatal strictures using the dorsal inlay technique. Methods: Patients who underwent a single-stage dorsal inlay oral mucosal graft urethroplasty between January 2000 and May 2021 were included in this study. A follow-up of a minimum of 12 months was necessary for inclusion. Exclusion criteria were stricture extension into the penile urethra, concomitant stricture at another location, flap urethroplasty for a meatal stricture, dorsal inlay urethroplasty with another type of graft, ventral onlay graft urethroplasty or staged urethroplasty. Recurrence was defined by the inability to pass a 14F metal sound through the reconstructed meatus irrespective of patients’ complaints. Results: Our study cohort included 40 patients. Buccal mucosal graft (BMG) urethroplasty was used in 25 patients and 15 patients were treated with the aid of lingual mucosal graft (LMG). The median follow-up was 85 (IQR: 69–110) months. Seven (17.5%) patients suffered a stricture recurrence of which four (10%) needed re-intervention. The median 5-y recurrent free survival (RFS) for the entire cohort was 85 (±6)%. The median 5-y RFS was 96 (±4)% versus 65 (±13)% for respectively BMG and LMG (p = 0.03). Post-operative complications were identified in 11 (27.5%) patients with only one (2.5%) patient who had a grade 3a complication. Conclusions: Dorsal inlay oral mucosa graft urethroplasty is a safe and feasible technique for selected patients with meatal stenosis.

31 August 2021 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
MWMarjan Waterloos
Marjan Waterloos
WVWesley Verla
Wesley Verla
MWMichel Wirtz
Michel Wirtz
MWMieke Waterschoot
Mieke Waterschoot
WCWietse Claeys
Wietse Claeys
NLNicolaas C. Lumen
Nicolaas C. Lumen
Introduction: Female urethral strictures and injuries are relatively uncommon compared to males. A wide range of possible causes and treatment modalities have been described. Lately female urethral reconstruction is gaining attention and is fortunately no longer a neglected topic within the reconstructive urology. As such, we aimed to describe our surgical techniques and outcomes for female urethroplasty from a tertiary center. Materials and Methods: Records of female patients who underwent a urethroplasty between July 2018 and May 2021 in our tertiary referral center were reviewed. Patients were subdivided in two groups: patients who suffered from a urethral injury and received an early repair urethroplasty, and patients with a true urethral stricture who received a delayed urethroplasty. Preprocedural, surgical and postoperative data were collected and analyzed with descriptive statistics. Results: A total of five patients in group 1 and nine patients in group 2 were included. Etiology of the urethral injury in group 1 was iatrogenic in 80% and transitional cell carcinoma of the urethra in 20% of cases. A patency rate of 100% at a follow-up of 30 months was achieved with the different techniques. In group 2 etiology was idiopathic (44%), iatrogenic (44%) and due to external trauma in 12% of cases. Urethroplasty technique consisted of primary repair or dorsal onlay of a buccal mucosal graft. Patency rate was 100% at a median follow-up of 13 months. Three patients suffered from postoperative urinary incontinence, one in group 1 and two in group 2. Conclusion: Female urethroplasty is a relatively rare entity within reconstructive urethral surgery. This case series of 14 patients demonstrates that with appropriate surgical techniques, a high patency rate with a low complication rate can be achieved. Further prospective studies with standardized diagnostic workup and follow-up should be performed in order to optimize management strategy.

31 January 2022 in World Journal of Urology
Verified
Journal Article
Closed access
PDF file
WVWesley Verla
Wesley Verla
MWMarjan Waterloos
Marjan Waterloos
MWMieke Waterschoot
Mieke Waterschoot
CCChristel Van Camp
Christel Van Camp
ELEdward Lambert
Edward Lambert
NLNicolaas C. Lumen
Nicolaas C. Lumen