<prompt> Which of the following are orbital tumours a Glioma b Lymphoma c Chloroma d Meningioma e Schwannomaabcdeabdabcacd  <response>: Orbital tumorsPrimary :- Optic nerve glioma, optic nerve sheat meningioma, cavernous hemangioma, schwannoma, lymphoma.Secondary :- Squmous cell carcinoma, malignant melanoma.Metastasis :Adult :- Breast, lung, prostate, kidney, GIT, melanoma.Children :- Neuroblastoma, Ewings sarcoma, chloroma, wilms tumor, histiocytosis, testicular embryonal sarcoma, ovarian sarcoma. 