Dimitri Roels

Dr. Dimitri Roels

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Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

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

Representative Publications

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25 May 2020 in Cornea
Verified
Journal Article
Closed access
EVEva Vanhonsebrouck
Eva Vanhonsebrouck
MWMieke Van De Walle
Mieke Van De Walle
WLWillem Lybaert
Willem Lybaert
VKVibeke Kruse
Vibeke Kruse
DRDimitri Roels
Dimitri Roels
Purpose: To report the first case of corneal graft rejection presumably associated with pembrolizumab immunotherapy. Methods: Case report and literature review. Results: An asymptomatic 85-year-old woman with a history of bilateral penetrating keratoplasty presented for a follow-up visit with bilateral diffuse keratic precipitates and subepithelial infiltrates. There were no anterior chamber cells. Bilateral subclinical corneal graft rejection was suspected. Three months previously, pembrolizumab immunotherapy was started for a metastatic urothelial cell tumor. Corneal graft rejection was managed with topical dexamethasone drops, which were tapered slowly. Pembrolizumab treatment was continued with careful ophthalmological follow-up. Unfortunately, recurrence of corneal graft rejection was observed 8 weeks after cessation of topical dexamethasone drops. After consulting the treating oncologist, pembrolizumab treatment was stopped to prevent recurrent corneal graft rejection. Conclusions: We report the first case of corneal graft rejection presumably associated with pembrolizumab immunotherapy. Corneal graft rejection may be successfully managed with corticosteroid therapy. However, constant vigilance and follow-up are advised because of the risk of recurrence in case of continued pembrolizumab treatment. Given the subclinical presentation, baseline ophthalmological screening is advised in all corneal graft patients after initiating immune checkpoint inhibitor therapy.

5 May 2021 in Ophthalmic Genetics
Verified
Journal Article
Closed access
JZJulie De Zaeytijd
Julie De Zaeytijd
FCFrauke Coppieters
Frauke Coppieters
MBMarieke De Bruyne
Marieke De Bruyne
JRJasper Van Royen
Jasper Van Royen
DRDimitri Roels
Dimitri Roels
BLBart Peter Leroy
Bart Peter Leroy
Background: Late-onset retinal degeneration (L-ORD) is a rare autosomal dominant retinal dystrophy related to C1QTNF5 gene variants. Materials and methods: Twenty-six patients (21–81 years) with L-ORD due to c.562C>A p.(Pro188Thr) with a mean follow-up time of 8 years (range 1–37 years) underwent an extensive ophthalmic work-up. Results: Best-corrected visual acuity (BCVA) and visual fields were maintained up to 50 to 55 years (n = 8), with a gradual decline, but conservation of functional central vision between 55 to 65 years (n = 15), followed by a steep decrease in overall visual function beyond 65 years (n = 9). Classic anterior segment findings in L-ORD of abnormally long, anteriorly inserted lens zonules were absent in most patients (n = 24/26). In contrast, findings of iris transillumination and sphincter pupillae atrophy with poor dilation were novel. Patients presented with three completely different initial fundus phenotypes: adjoining pavingstone-like atrophic patches (type 1) (n = 6/20); tiny yellow-white subretinal dots (type 2) (n = 8/20); or larger yellow, thick, round sub-RPE drusenoid deposits (type 3) (n = 4/20). Two patients had a mixed phenotype. Although different in presentation phenotype, patients eventually all progressed to a common panretinal atrophy with diffuse intraretinal pigment migration beyond the age of 65. Progression pace, and thus visual prognosis, differed depending on presentation phenotype. Specifically, type 2 appears to have a more benign course. Conclusions: Phenotypic analysis showed three distinct presenting phenotypes with a considerable intrafamilial variability both in age of onset of clinical signs and in disease progression, with a fair visual potential (>20/40) until the seventh decade. Abbreviations: L-ORD: Late-onset retinal degeneration; C1QTNF5: complement 1Q tumor necrosis factor 5; OCT: Ocular coherence tomography; BCVA: Best-corrected visual acuity; RPE: Retinal pigment epithelium; ffERG: Full-field electroretinography; IRD: Inherited retinal dystrophy; CNV: Choroidal neovascularization; LAZ: Long anteriorly inserted zonules; AMPK: AMP-activated protein kinase; IOP: Intraocular pressure; cSLO: confocal scanning laser ophthalmoscopy; BAF: Blue light autofluorescence; NIR-AF: Near-infrared autofluorescence; NIR-R: Near-infrared reflectance; RF: Red-free; SD-OCT: Spectral domain ocular coherence tomography; HRR: Hardy-Rand-Rittler pseudo-isochromatic plates; AS: anterior segment; UBM: ultrasound biomicroscopy; PCR: Polymerase chain reaction; SNP: Single nucleotide polymorphism; VEGF: Vascular endothelial growth factor; IZ: Interdigitation zone; EZ: Ellipsoid zone; ELM: External limiting membrane; LP: Light perception; AMD: Age-related macular degeneration; SFD: Sorsby fundus dystrophy

21 May 2021 in Ophthalmic Genetics
Verified
Journal Article
Closed access
THTom Van Hoorde
Tom Van Hoorde
FNFanny Nerinckx
Fanny Nerinckx
EKElke Kreps
Elke Kreps
DRDimitri Roels
Dimitri Roels
PHPhilippe Huyghe
Philippe Huyghe
BLBart Peter Leroy
Bart Peter Leroy
Traboulsi syndrome is a very rare, syndromic form of ectopia lentis that is potentially sight-threatening at a young age. It is characterized by typical facial, skeletal and ocular signs.Two siblin...

22 December 2022 in Case Reports in Ophthalmology
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Journal Article
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DPDeborah Peeters
Deborah Peeters
MVMelissa Vereecken
Melissa Vereecken
HDHannelore Denys
Hannelore Denys
DRDimitri Roels
Dimitri Roels
Trastuzumab is the cornerstone treatment for HER2-positive breast cancer. While ocular side effects are more commonly described after the use of the antibody-drug conjugate ado-trastuzumab emtansine, we here describe corneal melting in a 79-year-old patient after three cycles of trastuzumab monotherapy. Signs and symptoms persisted with subsequent trastuzumab cycles. The patient showed improvement after treatment with intense lubrication, topical antibiotics, and topical steroids. After tapering of steroids, there was recurrence of epitheliopathy after subsequent trastuzumab treatment, which subsided upon restarting topical steroids. Finally, the patient was kept on a low-dose topical steroid regimen which prevented further epitheliopathy during the next trastuzumab cycles.

20 October 2022 in American Journal of Ophthalmology Case Reports
Verified
Journal Article
Open access
SNSima Nissan
Sima Nissan
JBJerina Boelens
Jerina Boelens
KLKatrien Lagrou
Katrien Lagrou
DRDimitri Roels
Dimitri Roels
Pyrenochaeta unguis-hominis (syn. Neocucurbitaria unguis-hominis) is a rare fungal species belonging to the Coelomycetes group, mostly isolated from infected nails and skin. We present a case of contact lens-related fungal keratitis caused by Pyrenochaeta unguis-hominis. We present a case of a 69-year-old woman with multiple risk factors for a fungal keratitis including ophthalmological history of herpetic keratitis, contact lens wear and chronic steroid use. At presentation, the corneal ulcer resembled a recurrent herpetic keratitis but evolved into a more dense stromal infiltrate despite antiviral therapy. Microscopic examination, culture and staining of corneal tissue obtained by scraping showed mycelia. PCR and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry confirmed the presence of Pyrenochaeta unguis-hominis. Topical antifungal treatment was able to dim the inflammation. Because of a persistent epithelial defect, an amniotic membrane transplantation was performed. Although corneal epithelium was restored, stromal scarring in the visual axis resulted in substantial vision loss. To our knowledge no other cases of fungal keratitis caused by Pyrenochaeta unguis-hominis have been described. Early diagnosis can allow prompt initiation of antifungal treatment, which should be guided by in vitro susceptibility testing.

31 January 2024 in Cornea
Verified
Journal Article
Closed access
ETElke Thijs
Elke Thijs
DHDaire Hurley
Daire Hurley
BCBrendan Cummings
Brendan Cummings
DEDirk Elewaut
Dirk Elewaut
NVNick Verougstraete
Nick Verougstraete
DRDimitri Roels
Dimitri Roels
Purpose: The aim of this study was to report 2 cases of levamisole-adulterated cocaine-induced mucous membrane pemphigoid. Methods: This study is a review of case reports and literature. Results: Two patients presented with bilateral severe purulent conjunctivitis, corneal ulceration, and rapidly progressive forniceal shortening. Both patients were active cocaine users. A complete blood analysis showed a positive antineutrophil cytoplasmic antibody immunofluorescence with a mixed perinuclear antineutrophil cytoplasmic antibody and cytoplasmic-staining antineutrophil cytoplasmic antibody pattern. Direct immunofluorescence examination of conjunctival tissue showed linear deposition of component 3 and immunoglobulins at the basal membrane. A diagnosis of levamisole-adulterated cocaine-induced mucous membrane pemphigoid was made. In case 1, this suspicion was confirmed by investigating remnants of cocaine on the patient's debit card using mass spectrometry, which contained traces of levamisole. In both cases, aggressive immunosuppressive therapy combining systemic corticosteroids and rituximab was able to control the disease. However, by the time these therapies were initiated, significant corneal injury had occurred requiring corneal grafts in both patients. Conclusions: Given the rising abuse of cocaine, it is important that ophthalmologists are made aware of its association with severe atypical cicatricial conjunctivitis. To the best of our knowledge, we present the first case proving the causal relationship between levamisole and ocular cicatricial pemphigoid.