<prompt> A 12-year-old child presents with UL pink nasal mass. Most important investigation prior to undertaking surgery is:UltrasoundFNACBiopsyContrast CT scan  <response>: d Contrast CT scanRef. Cummings, 6th ed., 1422An adolescent male with UL pink nasal mass has to be investigated to rule out angiofibroma. So the next best investigation prior to undertaking surgery is a Contrast enhanced CT scan.FNAC and biopsy are contraindicated here for the fear of profuse bleeding. 