Fh. Koch et al., PARS-PLANA INCISIONS OF 4 PATIENTS - HISTOPATHOLOGY AND ELECTRON-MICROSCOPY, British journal of ophthalmology, 79(5), 1995, pp. 486-493
The pathology of pars plana incisions of four patients is described: t
hree with light microscopy and one with light and electron microscopy.
Two eyes were removed because of choroidal melanoma, immediately and
8 days after vitrectomy and transvitreous retinal biopsy. Considerable
disruption of tissues surrounding the pars plana incisions was observ
ed. Vitreous was incarcerated in the wounds, which healed with granula
tion tissue. One eye was examined 4 months after vitrectomy for diabet
ic retinopathy and a failed pars plana filtering operation. It contain
ed fibrovascular ingrowth from all the incisions, infiltrating the vit
reous base with granulation tissue and causing vitreous haemorrhage an
d retinal detachment. One eye was removed 1 year after vitrectomy for
anterior hyaloidal fibrovascular proliferation and early phthisis. The
wound had fibrous ingrowth histologically and evidence of active fibr
oplasia.