<prompt> Investigation of choice in discrete thyroid swellingsUSGFNACBiopsyRAI  <response>: Ans. b FNACRef: Bailey and Love page 75126th edition Fine-needle aspiration cytology is the investigation of choice in discrete thyroid swellings A discrete swelling in an otherwise impalpable gland is termed isolated or solitary, whereas the preferred term is dominant for a similar swelling in a gland with clinical evidence of generalised abnormality in the form of a palpable contralateral lobe or generalised mild nodularity. About 70 per cent of discrete thyroid swellings are clinically isolated and about 30 per cent are dominant 