2Cappelli C, Castellano M, Pirola I, et al. Thyroid nodule shape suggests malignancy [J]. Eur J Endocrinol, 2006,155 (1):27-31.
3Iannuccilli J D, Cronan J J, Monchik J M. Risk for malignancy of thyroid nodles as assessed by sonographic criteria: the need for biopsy [J]. J Ultrasound Med, 2004,23 (13) : 1455-1464.
4Cheng S P, Lee J J, Lin J, et al. Eggshell calcification in follicular thyroid carcinoma [J]. Eur Radiol, 2005,15 (16) : 1773-1774.
5Zimmerman D, Hay I D, Gough I R, et al. Papillary thyroid carcinoma in children and adults: long-term follow-up of 1039 patients conservatively treated at one institution during three decades [J]. Surgery, 1958,104(6) : 1157-1166.