[The significance of imaging in a case of intraorbital cystic tumor]. / Influenta investigatiilor imagistice într-un caz de tumora chistica intraorbitara.

Conjunctival inclusion cyst represents a congenital or, in most cases, an acquired disorder. The most frequent cause of an acquired conjunctival cyst is the implantation of conjunctival epithelium after surgical interventions or ocular trauma. Usually, these cysts are located supero-medially, with a stationary evolution, without a progression in dimension, but in some cases can evolve into enormous translucent cysts. Histologically, they are lined by stratified, nonkeratinized, squamous epithelium and contain desquamated cellular debris, chronic inflammatory cells and mucus, when goblet cells are present. Most cysts can be treated adequately by complete excision with marsupialization of the entire epithelial lining to prevent fluid reaccumulation.

[Ocular hypertension in herpes simplex keratouveitis]. / Hipertensiunea intraoculara în keratouveitele date de virusul herpes simplex.

The herpes simplex virus is one of the most common pathogens in humans, who are seropositive for the virus in 90% of the cases at the adult age. It determines reccurent infections in more than a third of the population and these infections depend on the immune response of the host. Ocular infections of newborns are due to the herpes simplex virus type 2, meanwhile type 1 is found predominantly at adults; almost all ocular structures can be affected. HSV-1 in the most frequent etiologic agent in infectious anterior uveitis (with the varicelo-zosterian virus) and it is responsible for 6-10% of all cases of anterior uveitis. More than half of the keratouveitides due to HSV will develop intraocular hypertension and open-angle secondary glaucoma, during reccurences and most of them will resolve after proper control of inflammation.

[Peripheral ulcerative keratitis]. / KERATITA ULCERATIVA PERIFERICA.

Ulcerative keratitis is frequently associated with collagen vascular diseases and presents a predilection for peripheral corneal localization, due to the distinct morphologic and immunologic features of the limbal conjunctiva, which provides access for the circulating immune complexes to the peripheral cornea via the capillary network. Deposition of immune complexes in the terminal ends of limbal vessels initiates an immune-mediated vasculitis process, with inflammatory cells and mediators involvement by alteration of the vascular permeability. Peripheral ulcerative keratitis generally correlates with exacerbations of the background autoimmune systemic disease. Associated sceritis, specially the necrotizing form, is usually observed in severe cases, which may evolve in corneal perforation and loss of vision. Although the first-line of treatment in acute phases is represented by systemic administration of corticosteroids, immunosuppressive and cytotoxic agents are necessary for the treatment of peripheral ulcerative keratitis associated with systemic diseases.