Fig. 28. A. Cross-section of retina shows vitreous adhesions to flat neovascular tissue (stage III proliferative sickle cell retinopathy [PSR]).Fig. 28 (continued).B. Cross-section of retina reveals large clump of neovascular tissue (stage III PSR) protruding from surface of retina into vitreous. C. Cross-section of retina and vitreous. Note large cluster of intravitreous neovascular tissue adherent to vitreous traction bands. (Romayananda N, Goldberg MF, Green WR: Histopathology of sickle cell retinopathy. Trans Am Acad Ophthalmol Otolaryngol 77:652, 1973.)