Background： The clinical behavior and management of poorly differentiated thyroid carcinoma （PDTC） are very different from papillary thyroid carcinoma （PTC）. By comparing the clinical and ultrasonographic feature...Background： The clinical behavior and management of poorly differentiated thyroid carcinoma （PDTC） are very different from papillary thyroid carcinoma （PTC）. By comparing the clinical and ultrasonographic features between the two tumors, we proposed to provide more possibilities for recognizing PDTC before treatment. Methods： The data of 13 PDTCs and 39 ageand gender-matched PTCs in Peking Union Medical College Hospital between December 2003 and September 2013 were retrospectively reviewed. The clinical and ultrasonic features between the two groups were compared. Results： The frequencies of family history of carcinoma, complication with other thyroid lesions, lymph node metastases, recurrent laryngeal nerve injuries, and distant metastases were higher in PDTCs （30.8%, 61.6%, 69.2%, 23.1%, and 46.2%, respectively） than those in PTCs （2.6%, 23.1%, 25.6%, 2.6%, and 2.6%, respectively） （P 〈 0.05）. The mortality rate of PDTCs was greatly higher than PTCs （P 〈 0.01）. Conventional ultrasound showed that the size of PDTCs was larger than that of PTCs （3.1±1.9 cm vs. 1.7± 1.0 cm）. Clear margins and rich and/or irregular blood flow were found in 92.3% of PDTCs, which differed substantially from PTCs （51.7% and 53.8%, respectively） （P 〈 0.05）. Conclusions： PDTC is more aggressive and its mortality rate is higher than PTCs. Accordingly, more attention should be given to suspicious thyroid cancer nodules that show large size, regular shape, and rich blood flow signals on ultrasound to exclude the possibility of PDTCs.展开更多
Needs analysis, as a commonly used technique of“identifying learners” needs for language teaching, has beenadopted hy many College English teachers. However, the pointthat needs to be made is that the learners needs...Needs analysis, as a commonly used technique of“identifying learners” needs for language teaching, has beenadopted hy many College English teachers. However, the pointthat needs to be made is that the learners needs may conflictwith the teacher's, which is confirmed by the survey studyconducted by the author. Based on Nunan's negotiation model,this paper explores means of balancing the conflict under learner-centered system, It is proposed that needs conflict can be easedup by negotiating learning activities, developing learners learning strategy, establishing rapport with students and improving the ability of organizing class.展开更多
文摘Background： The clinical behavior and management of poorly differentiated thyroid carcinoma （PDTC） are very different from papillary thyroid carcinoma （PTC）. By comparing the clinical and ultrasonographic features between the two tumors, we proposed to provide more possibilities for recognizing PDTC before treatment. Methods： The data of 13 PDTCs and 39 ageand gender-matched PTCs in Peking Union Medical College Hospital between December 2003 and September 2013 were retrospectively reviewed. The clinical and ultrasonic features between the two groups were compared. Results： The frequencies of family history of carcinoma, complication with other thyroid lesions, lymph node metastases, recurrent laryngeal nerve injuries, and distant metastases were higher in PDTCs （30.8%, 61.6%, 69.2%, 23.1%, and 46.2%, respectively） than those in PTCs （2.6%, 23.1%, 25.6%, 2.6%, and 2.6%, respectively） （P 〈 0.05）. The mortality rate of PDTCs was greatly higher than PTCs （P 〈 0.01）. Conventional ultrasound showed that the size of PDTCs was larger than that of PTCs （3.1±1.9 cm vs. 1.7± 1.0 cm）. Clear margins and rich and/or irregular blood flow were found in 92.3% of PDTCs, which differed substantially from PTCs （51.7% and 53.8%, respectively） （P 〈 0.05）. Conclusions： PDTC is more aggressive and its mortality rate is higher than PTCs. Accordingly, more attention should be given to suspicious thyroid cancer nodules that show large size, regular shape, and rich blood flow signals on ultrasound to exclude the possibility of PDTCs.
文摘Needs analysis, as a commonly used technique of“identifying learners” needs for language teaching, has beenadopted hy many College English teachers. However, the pointthat needs to be made is that the learners needs may conflictwith the teacher's, which is confirmed by the survey studyconducted by the author. Based on Nunan's negotiation model,this paper explores means of balancing the conflict under learner-centered system, It is proposed that needs conflict can be easedup by negotiating learning activities, developing learners learning strategy, establishing rapport with students and improving the ability of organizing class.
