<prompt> RetinoblastomaIs inherited in 50 of casesIs caused by deletion of 11q14Rosettes suggest good prognosisCauses death in 60 of sufferers in the UK  <response>: Rosettes are feature of well differentiated retinoblastoma, therefore suggest the good prognosis.Hereditary retinoblastoma accounts for 40 of cases and the gene is located at 13q14 chromosome.Prognosis is fair with 70-85 survival rate if the eyeball is enucleated before the occurrence of extra ocular extension. 