<prompt> Which of the following investigation contraindicated in retinoblastomaCTUSGFNACMRI  <response>: FNAC may lead to tumor seeding. Retinoblastoma is a rare malignant tumor of the retina usually seen in children before 5 years of age. The treating ophthalmologist suspected primary intraocular tumor, metastatic carcinoma, malignant melanoma, or lymphoma and referred the patient for fine needle aspiration cytology FNAC Reference : Aravind;S FAQ;S in ophthalmology, first edition, page no 409 