Biomedical subjects

Carl P Herbort

Publications and source records attributed to Carl P Herbort.

8 recordsLinked to original sources

PubMed2005

Retinal vasculitis.

Retinal vasculitis is a sight-threatening intraocular inflammation affecting the retinal vessels. It may occur as an isolated ocular condition, as a manifestation of infectious or neoplastic disorders, or in association with a systemic inflammatory disease. The search for an underlying etiology should be approached in a multidisciplinary fashion based on a thorough history, review of systems, physical examination, and laboratory evaluation. Discrimination between infectious and noninfectious etiologies of retinal vasculitis is important because their treatment is different. This review is based on recently published articles on retinal vasculitis and deals with its clinical diagnosis, its link with systemic diseases, and its laboratory investigation.

Diagnosis, Differential↗

PubMed2005

Ocular vasculitis: a multidisciplinary approach.

PURPOSE OF REVIEW: The ophthalmologist has direct visual access to inflamed vessels when examining the retina, and "vasculitis" in ophthalmology has so far mainly referred to retinal vasculitis. In the past few years the means to explore vasculitis in the ocular sphere have improved. Indocyanine green angiography now enables the analysis of choroidal inflammatory vasculopathy as well as vasculitis of the sclera (scleritis) and episclera (episcleritis) in addition to retinal vasculitis. Because vasculitis detected by the ophthalmologist can be the presenting sign of a systemic disease and has to be approached in a multidisciplinary fashion, the emerging term "ocular vasculitis," instead of retinal vasculitis, should be used in the future. The term covers vasculitis affecting all structures of the eye and the periocular tissues as detailed in this article. The ocular findings have to be integrated within the established and accepted classification of systemic vasculitis, which is divided into primary vasculitides, where the vessel itself is the target of the inflammatory reaction, and secondary vasculitides, caused by other inflammatory processes. This review will deal with recently published articles on ocular vasculitis, including its clinical aspects, its link with systemic diseases, and its investigation and management. The discussion will be conducted within the framework of the new classification put forward here. RECENT FINDINGS: Novel imaging techniques such as indocyanine green angiography have made it possible to explore inflammation of choroidal vessels and of scleral vasculitis in addition to retinal vasculitis, contributing to the global concept of ocular vasculitis. It has been shown, in particular, that the choriocapillaris, a vascular structure adjacent to the retina, can be the site of a primary inflammatory vasculopathy unrecognized so far. Most of the recent articles cited, however, deal not so much with new findings but with the integration of ocular pathologic changes into the systemic diseases they are part of. New knowledge about disease mechanisms and novel therapeutic modalities with biologic agents cited in this review are coming from other fields but have contributed to progress in the management of ocular vasculitis. SUMMARY: New investigational techniques of vasculitis in ocular structures other than the retina have contributed to the development of the global concept of ocular vasculitis. This review shows the importance of promoting a comprehensive and global classification of ocular vasculitis compatible with the concepts accepted for systemic vasculitis to contribute to its multidisciplinary approach.

Diagnostic Techniques, Ophthalmological↗

PubMed2004

Use of ultrasound biomicroscopy, indocyanine green angiography and HLA-B51 testing as adjunct methods in the appraisal of Behçet's uveitis.

PURPOSE: Behçet's uveitis is not common in western Europe and the disease presentation is less obvious than in "endemic" countries such as Turkey and Japan. This makes the diagnosis more difficult. Early diagnosis is important, as the prognosis is better if therapy is started early. New methods such as ultrasound biomicroscopy (UBM) and indocyanine green angiography (ICGA) can improve the characterisation and diagnosis of uveitis. Our purpose was to present our experience with these new methods as well as HLA-B51 testing in the appraisal of patients with Behçet's uveitis. PATIENTS AND METHODS: Patients seen by the authors between 1997 and 2001 with Behçet's uveitis or suspected Behçet's uveitis and who underwent ICG angiography or UBM were included. Symptoms and signs, results of laboratory work-up including HLA-B51 antigen testing and the delay to diagnosis, were analysed. Fluorescein and ICG angiography and UBM testing were performed according to standard protocols used for uveitis patients and their contribution towards diagnosis and management were analysed. RESULTS: Uveitis was non granulomatous in all patients. Fluorescein angiography showed moderate to severe diffuse retinal vasculitis compatible with Behçet's uveitis in all cases. HLA-B51 testing was positive in 5 of 7 tested cases, being useful to orient the diagnosis. UBM contributed to the diagnosis in all five tested cases, being the determining element in 3 patients. It allowed redirection of the diagnosis from pars planitis to Behçet's in 2 patients with poorly transparent media because it failed to show the typical pars planitis deposits. In a case originally diagnosed as Behçet's it allowed correction of the diagnosis to pars planitis because of the presence of the typical UBM pars plana depositis. ICG angiography allowed detection of choroidal vasculitis in all five tested cases. CONCLUSIONS: In Behçet's patients who did not present with a full-blown clinical picture, as they are often seen in non-endemic areas, UBM examination and HLA-B51 testing were valuable additional diagnostic elements helping to redirect the diagnosis correctly and to reduce the diagnostic delay in these patients. The hitherto unknown choroidal vasculitis shown by ICG angiography in all five investigated patients indicates that choroidal involvement probably occurs in most newly diagnosed Behçet's patients.

Adolescent↗

PubMed2002

Transpupillary thermotherapy for occult subfoveal neovessels in age-related macular degeneration: importance of patient pigmentation for the determination of laser settings.

BACKGROUND: Presently the indication for transpupillary thermotherapy (TTT) is the treatment of retrofoveal occult subretinal neovascular membranes (OSRNM) for which PDT (photodynamic therapy) has a limited effect. The diode laser power settings given by the manufacturer (Iridex Co, Mountain View, California) have to be modulated according to several criteria including patient pigmentation. The purpose here was to report on a group of patients that presented chorioretinal atrophy after TTT. METHODS: Thirty-eight eyes of 37 patients with OSRNM due to age-related macular degeneration underwent TTT. Indications to treat were diffuse exudative membranes, limited subfoveal OSRNM with a visual acuity of less than 0.4, or a drop of visual acuity of 3 Snellen lines or more since the previous examination. Dual fluorescein and indocyanine green angiography were used for angiographic follow-up. Treatment was performed according to the manufacturer's parameters. The group of patients that presented chorioretinal atrophy after TTT was analysed in this study RESULTS: Five patients presented a limited or spot-size related post-TTT chorioretinal atrophy. Pre-laser visual acuity was 0.34 +/- 0.13 and post-TTT visual acuity was 0.25 +/- 0.15. The OSRNM had disappeared in all cases. The common denominator in these patients was that they were white haired but upon questioning all happened to be dark-haired in their youth. CONCLUSIONS: Evolution towards atrophy can occur after TTT and probably depends on several factors. We showed that pigmentation is a parameter to be evaluated carefully before TTT and that laser power settings should progressively be diminished with increasing patient pigmentation. In white haired persons the original pigmentary status should be part of the patient history.

Aged↗

PubMed2002

Corticosteroid-induced central serous chorioretinopathy in patients with ocular inflammatory disorders.

BACKGROUND: Development of central serous chorioretinopathy (CSC) following the administration of corticosteroids by diverse routes is a well-known fact. We report acute visual loss after the use of systemic corticosteroids in three patients with long-standing ocular inflammatory disorders in whom CSC could initially be misinterpreted as a worsening of the primary inflammatory condition. METHODS: We analyzed the clinical findings and the fluorescein and indocyanine green (ICG) angiographic signs in those three patients. RESULTS: The first patient had birdshot chorioretinopathy with minimal functional impairment for several years without treatment. When visual acuity and fields deteriorated, systemic corticosteroids were administered resulting in improved inflammatory and functional parameters during the first 2 months. Subsequently, the visual acuity of his left eye decreased due to CSC. The second patient had Vogt-Koyanagi-Harada disease with five episodes of acute inflammation. She was treated each time with systemic corticosteroids, but thrice her visual acuity deteriorated, caused by CSC. The third patient presented with scleritis of his right eye related to relapsing polychondritis. Massive oral corticosteroids were given, soon followed by the development of CSC in the right eye. Fluorescein and ICG angiographic signs were typical for CSC in all three patients. Cyclosporine was introduced in the two first patients and cyclophosphamide in the third patient, in parallel with tapering of oral corticosteroids. Progressive regression of CSC occurred in all three patients. CONCLUSION: The potentially deleterious effects of corticosteroids, favoring CSC, are well-known. They should be borne in mind when an unexpected clinical and angiographic evolution compatible with CSC develops in an uveitis patient treated with corticosteroids.

Administration, Oral↗

PubMed2002

Assessment and classification of choroidal vasculitis in posterior uveitis using indocyanine green angiography.

BACKGROUND: By allowing one to detect fluorescence beyond the retinal pigment epithelium, indocyanine green angiography (ICGA) has made it possible to analyse the choroidal vessels. Our aim was to characterize choroidal vasculitis in posterior uveitis using ICGA. METHODS: Charts of active posterior uveitis patients with a specific diagnosis seen in the different centers participating in the study who had undergone dual fluorescein and ICG angiography were reviewed. The type of inflammatory involvement of the choroidal circulation at entry and the treatment response on follow-up angiograms were analysed. RESULTS: A total of 129 patients were analysed. Choroidal vasculitis could be subdivided into two main patterns: (1) primary inflammatory choriocapillaropathy and (2) stromal inflammatory vasculopathy. The first pattern consisted of hypofluorescent areas up to the late phase of angiography characteristic for choriocapillaris non-perfusion and included entities such as multiple evanescent white dot syndrome (MEWDS), acute posterior multifocal placoid pigment epitheliopathy (APMPPE), multifocal choroiditis (MC), ampiginous choroidopathy and serpiginous choroidopathy. The second pattern consisted of fuzzy indistinct appearance of vessels in the intermediate angiographic phase and diffuse choroidal hyperfluorescence in the late phase indicating inflammatory vasculopathy of larger choroidal vessels. This pattern was found in all cases of active Vogt-Koyanagi-Harada disease, ocular sarcoidosis and tuberculosis and birdshot chorioretinopathy. In Behçet's uveitis of recent onset, choriocapillaris perfusion delay and fuzzy choroidal vessels without diffuse late choroidal hyperfluorescence was found. In posterior scleritis, enlargement of vorticous veins was an additionnal ICGA sign. Stromal inflammatory vasculopathy always responded to anti-inflammatory therapy. A third group of patients with severe retinal or choroidal inflammation presented with associated secondary inflammatory choriocapillaropathy angiographically identical to the primary involvement. CONCLUSIONS: ICGA allowed the hitherto impossible characterization of inflammatory involvement of the choroidal vessels, showing either predominant inflammation of the choriocapillaris or predominant inflammation of the stromal choroidal vessels with or without secondary choriocapillaritis. ICGA will be indispensable for the correct evaluation and follow-up of posterior inflammation with suspected choroidal involvement.

Angiography↗

PubMed2002

Massive vascular endothelium growth factor (VEGF) expression in Eales' disease.

BACKGROUND: Eales' disease is an idiopathic retinal vasculitic and vaso-occlusive process complicated by extensive retinal neovascularisation and vitreous hemorrhages. The great propensity to produce retinal neovessels is one of the particular aspects of the disease that deserves to be further investigated. We report a case of Eales' disease having evolved over more than three decades, with a typical clinical presentation in one eye, while the other eye had to be enucleated because of a terminal neovascular glaucoma, thus allowing pathological examination. METHODS: The functional right eye was treated by vitrectomy, cerclage, cryocoagulation and endolaser. The non-functional phthitic left eye was enucleated and submitted for histopathological and immunohistochemical examination using antibodies against vascular endothelial growth factor, T-cells, B-cells and Müller cells. RESULTS: Evolution was favourable in the operated right eye, following management of the inflammatory reaction. The histopathological examination of the left eye revealed an occlusion of the anterior chamber angle by rubeosis iridis, tractional retinal detachments, pre-, intra- and sub-retinal neovascular membranes, and vitrous hemorrhages. Diffuse positive anti-VEGF immunostaining was found at the level of the retinal neovascular membranes. The retina exhibited prominent Müller cell immunostaining, indicating extensive gliosis, and predominantly B cell infiltrates were found in the eye. CONCLUSION: The present study indicates a close relationship between the prominent neovascular proliferation in Eales' disease and the intense expression of VEGF. The increased expression of VEGF, when compared to other conditions inducing neovascularisation, might explain the severity of neovascular growth and the propensity of repeated vitrous hemorrhages in Eales' disease.

Aged↗

PubMedDate not supplied

Subretinal neovascular membranes complicating uveitis: frequency, treatments, and visual outcome.

PURPOSE: Retrospective evaluation in a uveitic population of subretinal neovascular membranes (SRNMs), their occurrence, visual impact, and outcome in differently treated subgroups of patients. METHODS: Medical records of patients were reviewed and cases with SRNM (n = 12) identified. Intraocular inflammation was classified according to vitreous examination records as high (2+ cells), low (1/2+ to 1+ cells), or inactive (0 cells). Visual outcome was considered to be +VA (same or gain of one or more Snellen lines) or -VA (loss of Snellen lines). In nine cases, treatment consisted of the oral administration of high doses of corticosteroids (CST) for one month, tapered down in favorable situations (+VA or SRNM angiographic regression) or maintained at half the dose in unfavorable situations (-VA or SRNM angiographic progression) while additional laser therapies, including photodynamic therapy (PDT), transpupillary thermotherapy (TTT), or argon laser therapy (CLT)), were performed in some of the cases. The above treatment scheme was not applied in three cases (pre-PDT period; undiagnosed underlying uveitis treated without CST). RESULTS: Twelve out of 648 patients (1.9%) with uveitis developed SRNM. The mean visual impact was 4.5 Snellen lines and mean follow-up time was 19.5 months. Two patients with high intraocular inflammation had a favorable visual outcome with CST alone. Eight patients with low intraocular inflammation had a favorable visual outcome with CST alone in three cases, with additional laser therapy in four cases (PDT in 3 cases and TTT in 1 case), and exclusively with PDT in one case (undiagnosed uveitis). Two patients with no intraocular inflammation had unfavorable visual outcome with CST alone (no PDT/TTT available). CONCLUSION: SRNMs occurred as a rare complication of uveitis. Their visual outcome was relatively favorable. Although high doses of CST seem to be the first step in the management of SRNMs, alternative laser treatments should be considered early, especially in cases of absence or low intraocular inflammation.

Adolescent↗