Pathology of vitreous membranes

In a series of 355 Pars Plana Vitrectomy procedures for proliferative vitreous diseases [Rhegmatogenous retinal detachment with proliferative vitreo-retinopathy proliferative diabetic retinopathy, trauma and vascular retinopathies., 27 cases had a complete pathological evaluation, including light microspy and transmission electron microscopy, which revealed five cellular types, retinal pigment epithelium, fibrocytes, fibrous astrocytes macrophages and myo-Iibroblasts. Collagen was seen intra-cellular and also extracellular in various dimensions derived from any of the above cells