title: Coloboma of optic nerve with overlay of peripapillary retina.
abstract: An eye that had the clinical appearance of a tumour of the nerve head was found on histological examination to have a congenitally large scleral canal with secondary buckling of the overlying retina.
mesh_terms: D003103:Coloboma / Q000473:pathology*; D006801:Humans; D007223:Infant; D009900:Optic Nerve / Q000002:abnormalities* / Q000473:pathology; D012160:Retina / Q000002:abnormalities / Q000473:pathology; D012590:Sclera / Q000002:abnormalities / Q000473:pathology