This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Ocular Tumour, Subject name: Ophthalmology
The most common retrobulbar orbital mass in adults is - 
Select and explain. 
A. Neurofibroma, B. meningioma, C. Cavernous haemangioma, D. Schwannoma
C: Cavernous haemangioma
Answer: C: Cavernous haemangioma 
Explanation: Ans. is 'c' i.e., Cavernous hemangioma Cavernous hemangioma is the commonest benign orbital tumour among adults.The tumour is usually located in the retrobulbar muscle cone.It presents as a slowly progressing unilateral proptosis in the 2nd to 4th decade.Sometimes it may compress the optic nerve without causing symptoms.