Percentage of cold nodules that become malignant are: (A) 10%, (B) 15%, (C) 20%, (D) 40%
Answer is C. About 80% of discrete swellings are cold. The risk of malignancy is higher in "cold" lesions (20%) compared to "hot" or "warm" lesions (<5%) Ref: Bailey and love 27th edition Pgno :804