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
Herpes zoster ophthalmicus is predictor of: 
Select and explain. 
A. Leukemia, B. Lymphoma, C. HIV, D. All
D: All
Answer: D: All 
Explanation: A i.e. Leukaemia; B i.e. Lymphoma; C i.e. HIV Herpes zoster ophthalmicus is caused by varicella-zoster virus (DNA virus) After an infection with chicken pox in childhood or youth the virus lies dormant in Gasserian ganglion of trigeminal nerve to appear later, paicularly in elderly people with depressed cellular immunity e.g. cancer, leukaemia, AIDS, lymphoma, immunosuppressed organ transplant recipients, metastasis, disseminated, T.B. etc.