This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Voex Vein invasion is commonly seen in: 
Select and explain. 
A. Retinoblastoma, B. Malignant melanoma, C. Optic nerve gliomas, D. Medullo-epitheliomas
B: Malignant melanoma
Answer: B: Malignant melanoma 
Explanation: B i.e. Malignant melanoma Malignant melanoma of choroid is the commonest intraocular malignant primary tumor in adults Q. It involves voex veins Q as choroidal tissue is drained by these veins.