One of readers emailed me this question. My response to it follows.
on October 17, 2008 said:
I am a 28 asian/indian female. I was brought up in India for large part of my file.
I had symptoms of blind spots in my vision sometime back. The condition persisted for 2 days before I scheduled an appointment with my opthamalogist. He suspected that I have optic nueritis and advised me for a MRI. Now the lab technician says that I have a few lesions in my brain and asked me to consult a nuerologist. I have a pending appointment. My eye became completely normal in about 10 days from onset. By googling I found that it might be a case of MS.
Is it always the case optic nueritis + MRI lesions = MS? Is there anything else I should be looking at? I’ve had problems of vitamin deficiencies in the past. I have had some tongue rashes, gastro problems. Nothing serious but minor issues though.
patients who have optic neuritis usually do not complain of blind spots, rather they have acute/sudden loss of vision (usually in one eye, though in a condition called neuromyelitis optica they may have optic neuritis in both eyes). This condition may be painful (complaint of pain in the eye). Not all patients who have optic neuritis have multiple sclerosis. There can be many other causes of optic neuritis namely other infectious and inflammatory conditions. Patients who present with optic neuritis and are in the right age group (eg a woman in her 20s or 30s presenting with optic neuritis), need to be worked up for multiple sclerosis. Usually we order a MRI brain, to see if there is evidence of multiple sclerosis (read my posts on white matter lesions in the MRI brain of MS patients at http://braindiseases.info). As I have stated repeatedly, not all white matter lesions on the MRI represent multiple sclerosis.
In answer to your question, yes some vitamin deficiencies can cause blind spots and lesions in the brain. My advise to you would be to see a neurologist, the diagnosis of optic neuritis can be confirmed with the aid of certain tests like visual evoked potentials (VEP). Then the MRI can be interpreted in the right context.
Nitin Sethi, MD