An orbital tumor is an abnormal mass located within the orbit of the eye. These can be either malignant (cancerous) or benign (non-cancerous). Some of these include cavernous venous malformation, Schwannoma, Neurofibroma, lymphoma, or rhabdomyosarcoma among others. An MRI is the preferred scan for diagnosing orbital tumors but CT can also be used. Malignant tumor treatment may include surgery, chemotherapy, radiation, or a combination of these. Benign tumors typically can be removed with surgery alone.