<prompt> Investigation of choice for retinoblastoma isX rayUSGCECTMRI  <response>: Retinoblastoma is malignant congenital intraocular tumour arising from primitive photoreceptor cells of the retina included in primitive neuroectodermal tumour groupTwo types -Heritable and non-heritableTrilateral retinoblastoma rare variant bilateral retinoblastomas neuroectodermal pineal tumor pineoblastomaQuadrilateral retinoblastoma trilateral retinoblastoma 4th focus in suprasellar cisternMRI is the modality of choice for pre-treatment staging on retinoblastomaPrognosis: Spontaneous regression in 1Calcification is a ourable prognostic signContrast enhancement is a poor prognostic signRef: Radiology Review ManualBy Wolfgang Dahne 6thEtd, 351 