A Staged Procedure in the Treatment of Primary Lacrimal Sac Epithelial Malignancy: A Retrospective Cases Analysis

Purpose: To determine the effect of a staged procedure in the treatment of primary lacrimal sac epithelial malignancy. Methods: This is a retrospective case series of 18 consecutive patients with primary lacrimal sac epithelial malignancy treated at an orbital tumor referral center between 2002 and 2017. Study was conducted in compliance with the Declaration of Helsinki. All patients underwent biopsy of the mass to confirm the diagnosis pathologically. Chemotherapy concurrent with radiotherapy was delivered to the patients to reduce and concrete the tumor prior to surgery. En bloc resection of the lacrimal sac malignancy and nasolacrimal duct was followed. Results: Eleven patients were male and 7 patients were female. The median follow-up time was 72.2 months. Nine patients had squamous cell carcinoma, 7 poorly differentiated carcinoma, 1 transitional cell carcinoma, and 1 adenoid cystic carcinoma. After chemotherapy and radiotherapy, the tumor volume was reduced significantly (p

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