Coexistence of persistent fetal vasculature and retinoblastoma in the same eye.

Background: As retinoblastoma (RB) is the most frequent primary intraocular malignant tumor in childhood, it should be the main pathology to rule out in pediatric patients with leukocoria. Persistence of fetal vasculature (PFV) is within the differential diagnosis of leukocoria, a vitreous disorder arising from a defect in the involution of the hyaloid vasculature in the embryonic stage, which affects normal ocular development and commonly produces associated microophthalmia. An early diagnosis and timely treatment are crucial for a better prognosis and life expectancy of the child.

Frequency of conjunctival epithelial dysplasia in patients with pterygium.

Purpose: To determine the frequency of ocular squamous surface neoplasia associated with pterygium in an ophthalmology reference center in Central Mexico.

Methods: We reviewed histopathological reports and slides of all patients who underwent pterygium surgery from 2014 to 2016 at the Instituto Mexicano de Oftalmologia in Queretaro (Mexico).

Results: We studied 177 biopsy samples; 66% were from women, and the median age was 52 years.

Vitreous amyloidosis as primary manifestation of disease: case report.

A 35-year-old woman with progressive decrease of vision in both eyes and with no other associated symptoms, manifested as the only antecedent, the death of her brother due to amyloidosis. The visual acuity was counting fingers at 30 centimetres in the right eye and 20/70 in the left eye. In ophthalmoscopy of the right eye, a white, homogeneous vitreous, that was difficult to assess in detail, was observed, and in the left eye a whitish vitreous with band-like opacities in the cortical region.

Safety of intravitreal quinupristin/dalfopristin in an animal model.

Aim: To determine whether different intravitreal doses of quinupristin/dalfopristin lead to electroretinographic or histological changes in the rabbit retina over one month period after injection.

Methods: Eighteen New Zealand white rabbits were divided into three treatment groups (groups 1 to 3) and different intravitreal doses of quinupristin/dalfopristin were tested in each group. The right eye was injected with the drug and the left eye received intravitreal injection of 5% dextrose water and served as control eye.

Endophthalmitis of probable endogenous origin caused by Scedosporium boydii: A case report.

Background: Mycotic ocular infections caused by the Scedosporium apiospermum species complex are challenging to treat because of the delayed diagnoses and poor responses to antifungal drugs and surgical treatment.

Case Report: A case of a 69-year-old male patient with a history of diabetes mellitus type 2 and prior surgery on the right femur is described. In the 10 days prior to the ophthalmic consultation he started with ocular pain, adding to a previous and progressive loss of visual acuity in his right eye.