Publications by authors named "Francis L Munier"

Article Synopsis
  • - The study investigates the retinal phenotype in two siblings with new genetic variants linked to hereditary spastic paraplegia type 56 (HSP 56), which resemble type 2 macular telangiectasis (MacTel).
  • - Five family members underwent extensive ophthalmic evaluations and genetic testing, revealing that the affected siblings exhibited specific retinal anomalies, including loss of retinal transparency and abnormal pigment distribution.
  • - The findings suggest a potential connection between the observed retinal issues and the genetic variants, indicating a shared pathway in the development of both MacTel and the hereditary condition.
View Article and Find Full Text PDF
Article Synopsis
  • Congenital stationary night blindness (CSNB) is a genetic eye condition often linked to high myopia, which can lead to serious retinal issues, making understanding myopic progression crucial for potential treatments.
  • The study analyzed cases of CSNB associated with specific genetic variants in patients under 18 who had multiple eye measurements, using a mixed-effect model to track changes in myopia over time.
  • Results showed that individuals with CSNB are significantly myopic from birth and continue to experience worsening myopia as they grow, suggesting they may benefit from treatments aimed at slowing down myopia progression.
View Article and Find Full Text PDF

Of the different modalities used to treat retinoblastoma, a chemothermotherapeutic regimen combining carboplatin and thermotherapy (also termed focal therapy), and the application of melphalan as a monotherapy, are particularly successful. Some studies indicate that melphalan shows potential when applied in combination with focal therapy, and yet is not applied in this combination. Here we describe a series of synthetically modified melphalan derivatives that display enhanced cytotoxicity relative to melphalan itself, with some displaying further enhancements in cytotoxicity when applied in combination with heat (used as a model for thermotherapy).

View Article and Find Full Text PDF

This retrospective multicenter study examines therapy-induced orbital and ocular MRI findings in retinoblastoma patients following selective intra-arterial chemotherapy (SIAC) and quantifies the impact of SIAC on ocular and optic nerve growth. Patients were selected based on medical chart review, with inclusion criteria requiring the availability of posttreatment MR imaging encompassing T2-weighted and T1-weighted images (pre- and post-intravenous gadolinium administration). Qualitative features and quantitative measurements were independently scored by experienced radiologists, with deep learning segmentation aiding total eye volume assessment.

View Article and Find Full Text PDF

Purpose: The International Committee for the Classification of Corneal Dystrophies (IC3D) was created in 2005 to develop a new classification system integrating current information on phenotype, histopathology, and genetic analysis. This update is the third edition of the IC3D nomenclature.

Methods: Peer-reviewed publications from 2014 to 2023 were evaluated.

View Article and Find Full Text PDF

Background: Retinoblastoma (rb) is the most frequent intraocular tumor, accounting for 3% of all childhood cancers. Heritable rb survivors are germline carriers for an RB1 mutation and have a lifelong risk to develop non-ocular second primary tumors (SPTs) involving multiple other organs like the bones, soft tissues, or skin. These SPTs usually become manifest several years succeeding the diagnosis of rb.

View Article and Find Full Text PDF

Background: We report a three-generation family with isolated Alport-like retinal abnormalities in the absence of lenticonus, hearing loss, kidney disease, and detectable molecular genetic defects in known Alport-related genes.

Methods: Clinical examination includes ocular biomicroscopy, fundus photography, optical coherence tomography, dipstick urinalysis, serum creatinine assessment, and molecular genetic analysis.

Results: The proband, her mother, and her maternal grandmother had normal best-corrected visual acuity and normal visual fields in both eyes.

View Article and Find Full Text PDF

Introduction: Mutational screening of inherited retinal disorders is prerequisite for gene targeted therapy. Our aim was to report and analyze the proportions of mutations in inherited retinal disease (IRD)-causing genes from a single center in Switzerland in order to describe the distribution of IRDs in Western Switzerland.

Methods: We conducted a retrospective study of patient records.

View Article and Find Full Text PDF

Retinoblastoma is the most common pediatric eye cancer. It is currently treated with a limited number of drugs, adapted from other pediatric cancer treatments. Drug toxicity and relapse of the disease warrant new therapeutic strategies for these young patients.

View Article and Find Full Text PDF
Article Synopsis
  • Retinoblastoma is a rare type of eye cancer that develops from specific cells in the retina called red/green cone precursors.
  • It is the most common eye cancer in children around the world and holds significant importance in the fields of oncology and genetics.
  • The cancer's mutations were key to identifying anti-oncogenes (tumor suppressor genes), which has shaped our understanding of cancer biology.
View Article and Find Full Text PDF

Background: In intra-arterial chemotherapy for retinoblastoma, a backflow from unreachable external carotid artery branches in the ophthalmic artery can be challenging.

Objective: To describe a new endovascular technique using Gelfoam pledgets to temporarily occlude distal branches of the external carotid artery to reverse the competitive backflow into the ophthalmic artery in order to perform intra-arterial chemotherapy via the ostium of the ophthalmic artery in selected cases.

Methods: We queried our prospectively collected database of 327 consecutive patients treated for retinoblastoma by intra-arterial chemotherapy and identified those employing Gelfoam pledgets.

View Article and Find Full Text PDF

Retinoblastoma is a rare childhood cancer of the eye. Of the small number of drugs are used to treat retinoblastoma, all have been repurposed from drugs developed for other conditions. In order to find drugs or drug combinations better suited to the improved treatment of retinoblastoma, reliable predictive models are required, which facilitate the challenging transition from in vitro studies to clinical trials.

View Article and Find Full Text PDF

Aims: To report long-term results of intracameral chemotherapy (ICC) for aqueous seeding (AS) in retinoblastoma.

Methods: Retrospective study including 20 patients with primary (n=4) or secondary non-iatrogenic (n=16) AS treated with ICC according to a previously described technique between 2011 and 2020 with at least 1-year follow-up.

Results: AS control was initially achieved in all cases with a mean 5 injections of melphalan (n=13) or topotecan (n=7).

View Article and Find Full Text PDF

Aqueous humor (AH) can be easily and safely used to evaluate disease-specific biomarkers in ocular disease. The aim of this study was to identify specific proteins biomarkers in the AH of retinoblastoma (RB) patients at various stages of the disease. We analyzed the proteome of 53 AH samples using high-resolution mass spectrometry.

View Article and Find Full Text PDF

Background: Retinal retinoblastoma growth phenotypes can be endophytic, exophytic, diffuse infiltrating or anterior diffuse. Herein, we describe a novel tumor growth pattern in two patients.

Material And Methods: Imaging with spectral-domain optical coherence tomography (SD-OCT).

View Article and Find Full Text PDF

Purpose: To report that variants in the gene for a large lamina basal component protein, COL6A6 (collagen type VI alpha 6 chain, Col6α6), linked to chromosome 3p22.1 causes retinitis pigmentosa (RP) in patients with autosomal dominant transmission (adRP).

Methods: A positional-cloning approach, whole exome sequencing, and modeling were used.

View Article and Find Full Text PDF
Article Synopsis
  • The study aims to assess the differences in eye features due to Coats disease using optical coherence tomography angiography in affected, fellow, and normal eyes.
  • Results showed that affected eyes had a larger foveal avascular zone and decreased vascular density compared to fellow eyes, indicating significant changes in blood supply.
  • No differences were found between fellow eyes of Coats disease patients and healthy controls, highlighting that Coats disease typically affects only one eye.
View Article and Find Full Text PDF

Objective: To determine whether the clinical presentation of Coats disease differs between males and females.

Methods And Analysis: Records of patients diagnosed with Coats disease at a single institution were retrospectively reviewed. Demographic data, main reason for initial consultation, comprehensive ocular examination at diagnosis and modalities of treatments during the follow-up were recorded.

View Article and Find Full Text PDF

Purpose: The purpose of this study was to compare the natural history of visual function change in cohorts of patients affected with retinal degeneration due to biallelic variants in Bardet-Biedl syndrome genes: BBS1 and BBS10.

Methods: Patients were recruited from nine academic centers from six countries (Belgium, Canada, France, New Zealand, Switzerland, and the United States). Inclusion criteria were: (1) female or male patients with a clinical diagnosis of retinal dystrophy, (2) biallelic disease-causing variants in BBS1 or BBS10, and (3) measures of visual function for at least one visit.

View Article and Find Full Text PDF

Importance: High-risk histopathologic features of retinoblastoma are useful to assess the risk of systemic metastasis. In this era of globe salvage treatments for retinoblastoma, the definition of high-risk retinoblastoma is evolving.

Objective: To evaluate variations in the definition of high-risk histopathologic features for metastasis of retinoblastoma in different ocular oncology practices around the world.

View Article and Find Full Text PDF

Background: Whereas crystals deposit in the retina, the cornea and limbus in Bietty corneo-retinal dystrophy (BCD) is now well established and documented, only two published cases report their findings in the lens and no cases deep in the lens cortex.

Material And Methods: Four consecutive adult patients from three different unrelated families presenting lens crystals associated with advanced genetically confirmed BCD were enrolled with advanced disease and long follow up (>12 years). Demographics, visual acuity, slit lamp biomicroscopy, lens and posterior pole photography, optical coherence tomography (OCT), autofluorescence, and screening for CYP4V2 type of mutation were performed.

View Article and Find Full Text PDF

Secondary enucleation (SE) puts an irreversible end to eye-preserving therapies, whenever their prolongation is expected to violate the presumed state of metastatic grace. At present, it must be acknowledged that clear criteria for SE are missing, leading to empiric and subjective indications commonly related to disease progression or relapse, disease persistence masking the optic nerve head or treatment-related complications obscuring the fundus view. This absence of evidence-based consensus regarding SE is explained by the continuously moving frontiers of the conservative management as a result of diagnostic and therapeutic advances, as well as by the lack of studies sufficiently powered to accurately stratify the risk of metastasis in conservatively treated patients.

View Article and Find Full Text PDF

Objective: To investigate in a large global sample of patients with retinoblastoma whether sex predilection exists for this childhood eye cancer.

Methods: A cross-sectional analysis including 4351 treatment-naive retinoblastoma patients from 153 countries who presented to 278 treatment centers across the world in 2017. The sex ratio (male/female) in the sample was compared to the sex ratio at birth by means of a two-sided proportions test at global level, country economic grouping, continent, and for selected countries.

View Article and Find Full Text PDF