RÉSUMÉ
Objective: To determine the frequencies of various orbital malignancies amongst orbital lesions in patients presenting in a tertiary care hospital in Pakistan
Methods: A retrospective analysis of 666 orbital cases with an established histopathological diagnosis of malignant tumors treated in Mayo Hospital Lahore from 1996 to 2015 [20 years]
Results: About 66% of the malignant tumors were primary, 25% secondary, 8% haematopoietic and 1% metastatic. Almost 50% of the cases were children. Retinoblastoma is the commonest tumor [43% overall and 87% among children]. Squamous cell carcinoma is the second commonest [15.6% overall and 31% among adults]. These are then followed by Adenoid cystic carcinoma of Lacrimal Gland [9%], Lymphoma/Leukaemia [8%] and Rhabdomyosarcoma [6.3%]
Conclusion: Frequencies of various orbital malignancies show geographical variation in both paediatric and adult population