Caption

Eye cancer. Coloured axial magnetic resonance imaging (MRI) scan of a patient's head showing a retinoblastoma tumour (orange/white bulge) at the back of one of the eyes (upper right). This is a cancer of the retina, the light sensitive membrane that lines the back of the eye. It is usually found in infants, and often causes blindness in the affected eye. It is a malignant cancer, and can spread to the brain along the optic nerve. Treatment is surgical removal of the affected eye, sometimes combined with radiotherapy. Unless it is detected early, the prognosis is poor.