Bilateral Limbal Stem Cell Alterations in Patients With Unilateral Herpes Simplex Keratitis and Herpes Zoster Ophthalmicus as Shown by In Vivo Confocal Microscopy.

Purpose: The purpose of this study was to investigate the limbal changes in the palisades of Vogt (POV) in patients with herpes simplex keratitis (HSK) and herpes zoster ophthalmicus (HZO) with the application of in vivo confocal microscopy (IVCM). Methods: We enrolled 35 eyes of 35 consecutive patients with HSK and 4 patients with HZO in this observational study. Thirty-five participants were also recruited from a healthy population as the control group. All subjects were examined by IVCM in addition to routine slit-lamp biomicroscopy. The IVCM images of the corneal basal epithelial cells, corneal nerve, and the corneoscleral limbus were acquired and then were analyzed semiquantitatively. Results: The rate of absent and atypical POV was significantly higher in the affected eyes of patients with HSK than in the contralateral eyes and eyes of controls (88.57% vs. 65.71% vs. 17.14%, P < 0.01). In the HZO group, the rate of absent and atypical POV was 100% in the affected eyes and 50% in the contralateral eyes. When compared to the contralateral unaffected eyes and control eyes, the average density of the central basal epithelial cells and the sub-basal nerve plexus density and the total number of nerves in the central area of the affected eyes were significantly lower in the HSK group (1541 ± 704.4 vs. 2510 ± 746.8 vs. 3650 ± 746.1 cells/mm2, P < 0.0001). Spearman's rank correlation showed that the presence of absent and atypical POV had a significant negative correlation with central corneal basal epithelial cells (rs = -0.44979, P < 0.0001), the density of total nerves (rs = -0.49742, P < 0.0001), and the total nerve numbers (rs = -0.48437, P < 0.0001). A significant positive correlation was established between the presence of absent and atypical POV and HSK severity in affected eyes in the superior, inferior, nasal, and temporal quadrants (rs = 0.68940, rs = 0.78715, rs = 0.65591, and rs = 0.75481, respectively, P < 0.0001) and the contralateral eyes (rs = 0.51636, rs = 0.36207, rs = 0.36990, rs = 0.51241, correspondingly, P < 0.0001). Conclusions: Both eyes of patients with unilateral HSK and HZO demonstrated a profound and significant loss of limbal stem cells, which may explain the fact that HSK and HZO are risk factors for limbal stem cell deficiency (LSCD) in both eyes. The loss of LSCs was strongly correlated with the sub-basal nerve plexus and central basal epithelial cell alterations as shown by IVCM.

High resolution vessel wall MRI and vasculopathy related to herpes zoster ophthalmicus.

Varicella zoster virus is a common viral infection with over 50% of patients over the age of 80 years infected with the virus. Following reactivation, some patients succumb to complications of VZV reactivation with neurologic and optic pathway pathology such as VZV vasculopathy resulting in transient ischemic attacks, strokes, aneurysms, as well as optic neuritis. We show that high resolution vessel wall magnetic resonance imaging can aid in the diagnosis of this condition with circumferential wall thickening and enhancement of the infected vessels. Prompt diagnosis is critical as this is a treatable condition that could result in substantial morbidity or mortality if not recognized early.

The Skin and the Eye - Herpes Zoster Ophthalmicus in a Healthy 18-month-old Toddler.

Herpes zoster, caused by reactivation of varicella-zoster virus, is uncommon in infancy. Even more uncommon is herpes zoster ophthalmicus, defined as herpes zoster of the ophthalmic branch of the fifth cranial nerve. Among healthy children, primary varicella-zoster virus infection during gestation as a result of maternal varicella or the first year of life is the major risk factor for development of herpes zoster in a relatively young age. Here we present an unusual case of herpes zoster ophthalmicus with dissemination in an immunocompetent toddler with favorable outcome. The child's mother contracted chickenpox in late pregnancy and her son was very likely infected with varicella-zoster virus in utero. During a two-year follow-up the child vision was normal and there was no evidence of post herpetic neuralgia.

Immunopathology of Virus-Induced Anterior Uveitis.

Herpes simplex virus, varicella zoster virus, human cytomegalovirus, and rubella virus are the most common causes of virus-induced anterior uveitis. They can present in a variety of entities not only with typical but also overlapping clinical characteristics. These viral infections are commonly associated with ocular infiltration of T cells and B/plasma cells, and expression of cytokines and chemokines typical of a proinflammatory immune response. The infections differ in that the herpes viruses cause an acute lytic infection and inflammation, whereas rubella virus is a chronic low-grade infection with slowly progressing immunopathological responses. The outcome of an intraocular viral infection may largely be guided by the characteristics of the virus, which subsequently dictates the severity and type of the immune response, and the host immune status.

Inyección preauricular de betametasona de depósito y aciclovir para el tratamiento del herpes zóster oftálmico agudo / Preauricular injection of betamethasone depot and acyclovir for the treatment of acute herpes zoster ophthalmicus

CASOS CLÍNICOS: Para el manejo del herpes zóster oftálmico (HZO), se han descrito diferentes tratamientos. Sin embargo, la evolución de estos pacientes es usualmente prolongada y muchos de ellos desarrollan neuritis postherpética (NPH). En el presente trabajo, se presentan 3 casos clínicos, en los cuales, mediante una inyección preauricular de una mezcla de betametasona de depósito combinada con aciclovir se obtuvo una importante mejoría clínica y sintomática. Adicionalmente, no se reportó el desarrollo de NPH. DISCUSIÓN: La inyección preauricular de betametasona de depósito y aciclovir podría constituir una buena alternativa para el manejo del HZO

CLINICAL CASES: Several treatments have been described for the management of patients with herpes zoster ophthalmicus (HZO). However, the progress of these patients is usually slow, and many of them develop postherpetic neuritis (PHN). In the present paper, three clinical cases are presented, in which a significant symptomatic improvement was obtained by using a preauricular injection of a mixture of betamethasone depot combined with acyclovir. PHN did not develop in any of them. DISCUSSION: The preauricular injection of betamethasone depot and acyclovir could be a good alternative for the management of HZO