1/42. Primary ocular Epstein-Barr virus-associated non-Hodgkin's lymphoma in a patient with AIDS: a clinicopathologic report.OBJECTIVE: To report an unusual case of chronic multifocal chorioretinitis with vitritis in a patient with acquired immunodeficiency syndrome (AIDS) that was resistant to antiviral and antitoxoplasmic medication and required a retinal biopsy for definitive diagnosis. methods: Vitreous biopsy, pars plana vitrectomy, and retinal biopsy were performed. The vitreous biopsy material was sent for bacterial, fungal, and viral culture, and the vitreous cassette was sent for cytology. The retinal biopsy material was divided and sent for polymerase chain reaction testing for toxoplasmosis and virology and pathologic tissue analysis. RESULTS: Vitreous cytology showed a mixed population of lymphocytes and histiocytes, but all other microbiologic and virologic studies were negative. Tissue analysis revealed an infiltrate of atypical mononuclear cells extending from the inner limiting membrane through the outer plexiform layer characteristic of a B cell, non-Hodgkin's lymphoma of the central nervous system (NHL-CNS). in situ hybridization for the Epstein-Barr virus (EBV) was positive. An extensive systemic evaluation did not show evidence of extraocular tumor. CONCLUSION: Although rare, primary ocular NHL-CNS can be seen in patients with AIDS, and its clinical presentation often closely resembles other disorders. To our knowledge, this case represents the first ocular NHL in which EBV is shown to be associated.- - - - - - - - - - ranking = 1keywords = toxoplasmosis (Clic here for more details about this article) |
2/42. Upward extension of an atrophic tract of the retinal pigment epithelium associated with congenital macular toxoplasmosis.PURPOSE: To report an unusual case of gravitational atrophic tract of the retinal pigment epithelium in a 20-year old woman. methods: Case Report. RESULTS: The patient had macular cicatricial congenital toxoplasmic chorioretinitis in both eyes. In the right eye, an atrophic tract of the retinal pigment epithelium originating from the upper margin of the macular scar extended upwards toward the retinal periphery. CONCLUSION: The unusual upward direction of the atrophic tract of retinal pigment epithelium may be explained by the in utero head position during the active phase of the chorioretinal disease.- - - - - - - - - - ranking = 4keywords = toxoplasmosis (Clic here for more details about this article) |
3/42. Use of the polymerase chain reaction for diagnosis of ocular toxoplasmosis.OBJECTIVE: To report a cohort of patients in whom polymerase chain reaction (PCR) was performed on vitreous samples and to place in perspective the current role of PCR in the diagnosis of ocular toxoplasmosis. DESIGN: Noncomparative case series. PARTICIPANTS: Fifteen patients in whom toxoplasmic retinochoroiditis was considered in the differential diagnosis and in whom the clinical presentation was not diagnostic and/or response to treatment was inadequate. INTERVENTION: Examination of vitreous fluid by PCR and of serum for the presence of toxoplasma-specific antibodies. MAIN OUTCOME MEASURES: Presence of toxoplasma gondii dna, serologic test results, clinical findings, treatment, and outcome. RESULTS: In 7 of 15 patients, vitreous fluid examination results by PCR were positive for the presence of T. gondii dna. Five of these seven patients had serologic test results consistent with toxoplasma infection acquired in the distant past; the other two patients had serologic test results consistent with retinochoroiditis in the setting of acute toxoplasmosis. The PCR results influenced the management of these patients in six of the seven positive cases. In the eight patients in whom vitreous examination results were negative by PCR, either toxoplasma serology was negative (6), the retinal lesions were caused by cytomegalovirus (1), or, on further consideration, the eye signs were not consistent with those of toxoplasmic retinochoroiditis (1). CONCLUSION: In patients in whom toxoplasmosis is considered in the differential diagnosis but in whom the presentation is atypical, PCR was frequently a useful diagnostic aid.- - - - - - - - - - ranking = 57.401869704055keywords = ocular toxoplasmosis, toxoplasmosis (Clic here for more details about this article) |
4/42. Childhood blindness and visual loss: an assessment at two institutions including a "new" cause.PURPOSE: This study was initiated to investigate the causes of childhood blindness and visual impairment in the united states. We also sought a particular etiology--congenital lymphocytic choriomeningitis virus (LCMV)--which has been considered exceedingly rare, in a fixed target population of children, the severely mentally retarded. methods: We undertook a library-based study of the world literature to shed light on the causes of childhood blindness internationally and to put our data in context. We prospectively examined all consented children (159) at 2 institutions in the united states to determine their ocular status and the etiology of any visual loss present. One of the institutions is a school for the visually impaired (hereafter referred to as Location V), in which most of the students have normal mentation. The other is a home for severely mentally retarded, nonambulatory children (hereafter referred to as Location M). This institution was selected specifically to provide a sample of visual loss associated with severe retardation because the handful of cases of LCMV in the literature have been associated with severe central nervous system insults. Histories were obtained from records on site, and all children received a complete cyclopleged ophthalmic examination at their institution performed by the author. patients at Location M with chorioretinal scars consistent with intrauterine infection (a possible sign of LCMV) had separate consents for blood drawing. Sera was obtained and sent for standard TORCHS titers, toxoplasmosis titers (Jack S. Remington, MD, Palo Alto, Calif), and ELISA testing for LCMV (Centers for Disease Control and Prevention, Atlanta, Ga). RESULTS: The diagnoses at Location V were varied and included retinopathy of prematurity (19.4%), optic atrophy (19.4%), retinitis pigmentosa (14.5%), optic nerve hypoplasia (12.9%), cataracts (8.1%), foveal hypoplasia (8.1%), persistent hyperplastic primary vitreous (4.8%), and microphthalmos (3.2%). The most common diagnosis at Location M was bilateral optic atrophy, which was found in 65% of the patients examined who had visual loss. Of these, the insults were most often congenital (42.6%), with birth trauma, prematurity, and genetics each responsible for about 15% of the optic atrophy. The second most common diagnosis was cortical visual impairment (24%), followed by chorioretinal scars (5%), which are strongly suggestive of intrauterine infection. Of 95 patients examined at Location M, 4 had chorioretinal scars. Two of these had dramatically elevated titers for LCMV, as did one of their mothers. One of the other 2 children died before serum could be drawn, and the fourth had negative titers for both TORCHS and LCMV. CONCLUSIONS: At both locations studied, visual loss was most often due to congenital insults, whether genetic or simply prenatal. The visual loss at Location V was twice as likely as that at Location M to be caused by a genetic disorder. The genetic disorders at Location V were more often isolated eye diseases, while those among the severely retarded at Location M were more generalized genetic disorders. Our study identified optic atrophy as a common diagnosis among the severely mentally retarded with vision loss, a finding that is supported by previous studies in other countries. In our population of severely retarded children, the target etiology of lymphocytic choriomeningitis virus was responsible for half the visual loss secondary to chorioretinitis from intrauterine infection. This is more common than would be predicted by the few cases previously described in the literature, and strongly suggests that LCMV may be a more common cause of visual loss than previously appreciated. We believe that serology for LCMV should be part of the workup for congenital chorioretinitis, especially if the TORCHS titers are negative, and that perhaps the mnemonic should be revised to "TORCHS L." Childhood blindness and visual impairment are tragic and co- - - - - - - - - - ranking = 1keywords = toxoplasmosis (Clic here for more details about this article) |
5/42. lymphocytic choriomeningitis virus chorioretinitis mimicking ocular toxoplasmosis in two otherwise normal children.PURPOSE: To report unilateral macular lesions, mimicking toxoplasmic scars, in two children with serological evidence for lymphocytic choriomeningitis virus infection. methods: case reports. RESULTS: patients were 4 and 5 years old, with negative toxoplasma serologies and no sign of rubella, cytomegalovirus, or herpes simplex infection (TORCH evaluation). lymphocytic choriomeningitis virus infection was detected in both cases by enzyme-linked immunosorbent assay and confirmed by Western immunoblotting. The modes of infection were unknown; no history of symptomatic systemic lymphocytic choriomeningitis virus infection was reported, and lymphocytic choriomeningitis virus serologies were negative in the mothers of the patients. Neurological examinations and brain magnetic resonance imaging were normal. CONCLUSION: Our observations suggest that chorioretinal scars can be an isolated manifestation of lymphocytic choriomeningitis virus infection.- - - - - - - - - - ranking = 44.321495763244keywords = ocular toxoplasmosis, toxoplasmosis (Clic here for more details about this article) |
6/42. Ophthalmological findings in children with congenital toxoplasmosis. Report from a Swedish prospective screening study of congenital toxoplasmosis with two years of follow-up.Congenital toxoplasmosis may lead to severe visual impairment or neurological sequelae in the child. PURPOSE: To study the severity of the primary and late ophthalmological dysfunction during a prospective incidence study of congenital toxoplasmosis in the Stockholm and Skane counties. methods: blood collected on phenylketonuria (PKU) cards from 40,978 consecutively born children were investigated for antitoxoplasma antibodies. Children with verified congenital toxoplasmosis were treated for 12 months with antiparasitic therapy and followed ophthalmologically, neurologically and serologically every third month. RESULTS: Three children had congenital toxoplasmosis. Two of these were asymptomatic at birth and would have escaped early detection without screening. One child had unilateral severe visual impairment and CNS involvement. The incidence of congenital toxoplasmosis was less than 1:10,000. CONCLUSION: neonatal screening is of importance to diagnose asymptomatic infected children with congenital toxoplasmosis as treatment has been shown to reduce long-term sequelae. Ophthalmological investigations should start early and continue in co-operation with paediatricians.- - - - - - - - - - ranking = 14keywords = toxoplasmosis (Clic here for more details about this article) |
7/42. Intracerebral toxoplasmosis presenting as a mass lesion.Intracerebral toxoplasmosis is an uncommon condition and for it a produce an intracerebral mass is rare. A case is reported in a patient also suffering from lymphosarcoma, who had received immunosuppressive therapy and who had recently had herpes zoster ophthalmica.- - - - - - - - - - ranking = 5keywords = toxoplasmosis (Clic here for more details about this article) |
8/42. Presumed ocular toxoplasmosis presenting as papillitis.Unilateral papillitis is a rare manifestation of ocular toxoplasmosis. However, other causes of papillitis need to be ruled out before concluding the diagnosis.- - - - - - - - - - ranking = 55.401869704055keywords = ocular toxoplasmosis, toxoplasmosis (Clic here for more details about this article) |
9/42. Branch retinal arterial occlusion associated with toxoplasmic chorioretinitis.BACKGROUND: Ocular toxoplasmosis can cause a variety of retinal vascular changes including branch retinal arterial occlusion, which is a rare complication of the disease. PATIENT AND methods: We report a case of toxoplasmic chorioretinitis in a pregnant woman, who developed branch retinal arterial obstruction adjacent to the active chorioretinitis lesion. RESULTS: The patient received an appropriate steroid and antibiotic treatment and the retinitis lesion resolved over a six-week period. At two months after diagnosis, visual acuity in her right eye was 20/30 and there was a hyperpigmented scar at the site where active retinitis had been observed. CONCLUSION: Especially in young patients with branch retinal vascular occlusion associated with posterior uveitis, the diagnosis of ocular toxoplasmosis should be kept in mind and serologic test results should be obtained.- - - - - - - - - - ranking = 12.080373940811keywords = ocular toxoplasmosis, toxoplasmosis (Clic here for more details about this article) |
10/42. Recurrent secondary frosted branch angiitis after toxoplasmosis vasculitis.PURPOSE: To describe a case of recurrent frosted branch angiitis after treatment of ocular toxoplasmosis. methods: In a 6-year-old boy, we found perivascular, creamy, patchy, retinal sheathing in both eyes without any focal necrotizing retinochoroiditis or scarring. IgM antibodies for toxoplasma gondii were also found. The patient was treated with antitoxoplasmosis medication and a systemic steroid. RESULTS: Several years after treatment of the toxoplasmosis, frosted branch angiitis occurred twice without any retinal scarring or serological evidence of toxoplasmosis. After systemic steroid therapy, the angiitis improved without further complications. CONCLUSIONS: Toxoplasmic retinal vasculitis should be considered as a cause of frosted branch angiitis.- - - - - - - - - - ranking = 18.080373940811keywords = ocular toxoplasmosis, toxoplasmosis (Clic here for more details about this article) |
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