5 mm were found in almost all patients with
thyroid cancer (96.9%), they were also found
in over half (56.4%) of patients without
thyroid cancer. The authors identified three characteristics of nodules found on ultrasound that were significant predictors of thyroid cancer—microcalcifications (odds ratio [OR] 8.1), size >2 cm (OR, 3.6), and an entirely solid composition (OR, 4.0)."
http://www.endocrineweb.