Sialidosis type I (cherry red spot-myoclonus syndrome).

Sialidosis type 1 or the cherry red spot-myoclonus syndrome (CRSM) is an autosomal recessive disorder with the onset in adolescence of myoclonus and gradual visual failure. Here, a case of CRSM in a 12-year-old Bengali Muslim girl with the history of myoclonic jerks of limbs and the body since last 2 years and gradual impairment of vision since last one year is presented with a brief review of the literature.