Sir,

We present a case of Susac syndrome, which is rare, but more common than thought. It is characterised by the triad of retinal arterial occlusion, sensorineural deafness and encephalopathy.1,2 This condition is often under diagnosed or misdiagnosed as multiple sclerosis3 or systemic lupus erythematosus. We also discuss the differential diagnosis especially in the absence of early diagnosis of the disease.

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