Silicone oil injection in conjunction with pars plana vitrectomy was carried out by five surgeons in 415 consecutive patients using the same surgical equipment, the same surgical techniques and the same highly purified silicone oil (viscosity, 5000 mPa.s). Indications for silicone oil injection after vitrectomy included advanced stages of proliferative vitreoretinopathy following rhegmatogenous retinal detachment (49%), severe proliferative diabetic retinopathy (38%), and proliferative vitreoretinopathy following retinal detachment due to ocular trauma (13%). Postoperative complications were noted in a 6- to 30-month follow-up period. Cataractous changes of varying degree were seen in all phakic eyes. Silicone oil entered the anterior chamber in 6% of all phakic and pseudophakic eyes. Subretinal silicone oil was noted in 4%. Other complications associated with the use of intravitreal silicone oil included biomicroscopically visible silicone oil emulsification (0.7%), keratopathy (5.5%), glaucoma (6%), closure of the inferior iridectomy (6%), and reproliferation of epiretinal and subretinal fibrous membranes (40%). We anticipate that the physico-chemical characteristics of the highly purified silicone oil (viscosity, 5000 mPa.s) and the routine performance of an inferior iridectomy in all aphakic eyes had a positive impact on the low incidence of silicone-oil-related complications such as emulsification, keratopathy and secondary glaucoma.
Between 1960 and 1987 29 patients underwent surgery at the Munich University Eye Hospital for benign and malignant tumors of the lacrimal gland. Fifteen tumors were classified as pleomorphic adenomas (three of them with malignant transformation), nine as adenoid cystic carcinomas, two as adenocarcinomas, two as oxyphilic adenomas, and one as oxyphilic adenocarcinoma. The clinico-pathologic correlation of these tumors is described. All age groups were involved in both benign and malignant epithelial gland tumors. A fast growing lesion with bone destruction of the lacrimal fossa in association with pain was found to be highly suspicious of a malignant epithelial tumor. Prior to surgery, inflammatory lesions and lymphomas should be ruled out by clinical history, examination, diagnostic imaging techniques, and, occasionally, by a short course of oral corticosteroids. A diagnostic biopsy prior to tumor excision and a transfrontal surgical approach via craniotomy has a negative impact on the prognosis. Thus it is mandatory to remove epithelial lacrimal gland tumors completely at the time of the initial surgical procedure. Craniotomies facilitate recurrences of lacrimal gland tumors by infiltration into the central nervous system. Lateral orbitotomies using the Krönlein technique are the best surgical approach for successful removal of these unusual tumors.
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