3Cappelli C, Castellano M, Pirola I, et al. Thyroid nodule shape suggests malignancy. Eur J Endocrinol, 2006,155 : 27-31.
4Hatabu H, Kasagi K, Yamamoto K, et al. Cystic papillary carcinoma of the thyroid gland: a new sonographic sign. Clin Radiol,1991,43:121-124.
5Carcangiu ML, Zampi G, Rosai J. Papillary thyroid carcinoma: a study of its many morphologic expressions and clinical correIates. Pathol Ann,1985,20(Pt 1) :1-44.
6Katoh R, Kawaoi A, Muramatsu A, et al. Birefringent ( calcium oxalate) crystals in thyroid diseases. Am J Surg Pathol, 1993,17: 698-705.
7Reading CC,Charboneau W, Hay ID, et al. Sonography of thyroid nodules: a "classic pattern" diagnostic approach. Ultrasound Q, 2005,21:157-165.
8Kakkos SK, Scopa CD, Chalmoukis AK, et al. Relative risk of in sonographically detected thyroid nodules with calcifications. J Clin Ultrasound, 2000, 28: 347-352.
9Khoo ML, Asa SL, Witterick IJ, et al. Thyroid calcification and its association with thyroid carcinoma. Head Neck, 2002,24 : 651-655.
10Park CH,Rothermel FJ, Judge DM. Unusual calcification in mixed papillary and follicular carcinoma of the thyroid gland. Radiology, 1976,119:554.
4Yoon DY, Lee JW,Chang SK,et al. Peripheral calcification in thyroid nodules: ultrasonographic features and prediction of malignancy[J]. J Ultrasound Med,2007,26(10) : 1349-1355.
5Kwak MS,Baek JH,Kim YS,et al. Patterns and significance of peripheral calcifications of thyroid tumors seen on ultrasound[J]. J Korean Radiol Soe, 2005,53:401.
6Park M, Shin JH,Han BK,et al. Sonography of thyroid nodules with peripheral calcifications[J]. J Clin Ultrasound, 2009,37 (6) : 324-328.
7Liu HF,Tang WS,Yang ZY.Thyroid nodules with calcification and thyroid carcinoma[J]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao,2003,25 (5) : 626-629.
8Khoo ML,Asa SL,Witterick U,et al. Thyroid calcification and its association with thyroid carcinoma[J]. Head Neck,2002,24(7):651-655.
