RT Journal Article SR Electronic T1 Heterochromia irides and mistaken identity of retinoblastoma JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e231091 DO 10.1136/bcr-2019-231091 VO 12 IS 10 A1 Moh'd Saleh Abu-Ain A1 Raed Shatnawi A1 Yacoub A Yousef A1 Patrick Watts YR 2019 UL http://casereports.bmj.com/content/12/10/e231091.abstract AB Retinoblastoma is the most common intraocular malignancy of infancy which frequently manifests with a white pupillary reflex. We report a case of delayed presentation of a child with retinoblastoma in his left eye because parents thought the change in iris colour in this eye was due to the innocent heterochromia irides that was previously diagnosed in his elder sibling. This late presentation necessitated enucleation of the affected eye followed by chemotherapy.