<prompt> Which of the following is not of prognostic significance to choroidal melanoma ?Presence of retinal detachmentSize of the tumourCytology of the tumor cellsPresence of extraocular extension  <response>: Prognosis of choroidal melanoma depends upon :-Cell typeSize of tumorLocation of tumorEvidence of invasion extrascleral or vortex veinAge of the patientCytologyChromosomal abnormalities. 