<prompt> Reese-Ellsworth classification is used for?RhabdomyosarcomaRetinoblastomaOptic nerve sheath tumorMeningioma  <response>: ANSWER: B RetinoblastomaREF: Decision Making in Radiation Oncology, Volume 2 by Jiade J. Lu page 1041Repeat from June 2008Reese-Ellsworth classification of Retinoblastoma:TypeDescriptionGroup IVery favourableASolitary tumor, less than 4 dd in size, at or posterior to the equatorBMultiple tumors, none over 4 dd in size, all at or posterior to the equatorGroup IIFavourableASolitary tumor, 4-10 dd in size, at or posterior to the equatorBMultiple tumors, 4-10 dd in size, all posterior to the equatorGroup IIIDoubtfulAAny lesion anterior to the equatorBSolitary tumors larger than 10 dd posterior to the equatorGroup IVUnfavorableAMultiple tumors, some larger than 10 ddBAny lesion extending to the ora serrataGroup VVery unfavourableAMassive tumors involving over half the retinaBVitreous seedingdd disc diameter approximately 1.5 mm 