orbital lymphangioma

orbital lynphangioma is a low-flow or no-flow vascular malformation. it is a congenital and isolated hemodynamic lesion in which the clinical presentation and onset are related to orbital, peri-orbital or intracranial involvement. in addition, history of previous trauma and upper respiratory tract infection are important predictor factors. high resolution mri, doppler ultrasound and ct-scan are useful for diagnosis. observation is the preferred method of management except for lesions with visual loss and cosmetic problems. treatment methods depend on individual clinical and paraclinical manifestations of each patient.