Ultrastructural study of a retinoma by intraocular fine-needle aspiration biopsy.

The authors present the results of a transmission electron-microscopic study performed on a tissue sample obtained by an intraocular fine-needle aspiration biopsy in a case of retinoma. The ultrastructural study showed that the tumor was composed mainly of granular osmiophilic material which contained some tumor cells. These cells showed peculiar ultrastructural characteristics, which demonstrated their neural character, and appeared in different degenerative stages.

Retinal manifestations of Mediterranean spotted fever.

The authors studied the incidence, type and systemic relationship of the retinal findings observed by ophthalmoscopy in Mediterranean spotted fever (MSF) in a consecutive series of 34 cases. It is found that retinal vasculitis either arterial and/or, more frequently, venous is present in 55.9% of the cases.