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https://www.readbyqxmd.com/read/28324106/clinical-features-of-early-and-late-postoperative-hypothyroidism-after-lobectomy
#1
Suyeon Park, Min Ji Jeon, Eyun Song, Hye-Seon Oh, Mijin Kim, Hyemi Kwon, Tae Yong Kim, Suck Joon Hong, Young Kee Shong, Won Bae Kim, Tae-Yon Sung, Won Gu Kim
Context: Lobectomy is preferred in thyroid cancer to decrease surgical complications and avoid lifelong thyroid-hormone replacement. However, postoperative hypothyroidism, requiring thyroid-hormone replacement, may occur. Objective: We aimed to identify the incidence and risk factors of postoperative hypothyroidism to develop a surveillance strategy after lobectomy for papillary thyroid microcarcinoma (PTMC). Methods: This historical cohort study involved 335 PTMC patients treated by lobectomy...
January 11, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323932/active-surveillance-for-patients-with-papillary-thyroid-microcarcinoma-a-single-center-s-experience-in-korea
#2
Hyemi Kwon, Hye-Seon Oh, Mijin Kim, Suyeon Park, Min Ji Jeon, Won Gu Kim, Won Bae Kim, Young Kee Shong, Dong Eun Song, Jung Hwan Baek, Ki-Wook Chung, Tae Yong Kim
Context: Papillary thyroid microcarcinoma (PTMC) usually has an excellent prognosis. Objective: To evaluate the 3-dimensional structures of PTMCs using serial neck ultrasonography (US) in patients under active surveillance. Design and Setting: A retrospective cohort study. Participants: In total, 192 patients diagnosed with PTMC under active surveillance for more than 1 year were included in a median 30-month follow-up...
March 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28289666/is-familial-papillary-thyroid-microcarcinoma-more-aggressive-than-sporadic-form
#3
Cho Rok Lee, Seulkee Park, Sang-Wook Kang, Jandee Lee, Jong Ju Jeong, Kee-Hyun Nam, Woong Youn Chung, Cheong Soo Park
PURPOSE: With the increasing incidence of papillary thyroid microcarcinoma (PTMC), familial papillary thyroid microcarcinoma (FPTMC) is now recognized more frequently. However, the biological behavior of FPTMC is poorly understood. The aim of this study was to investigate the prevalence of FPTMC and its biological aggressiveness. METHODS: Between March 2006 and July 2010, 2,414 patients underwent primary surgical therapy for PTMC and 149 (6.2%) were further classified as FPTMC...
March 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28286037/surface-enrichment-with-hydroxyapatite-nanoparticles-in-stereolithography-fabricated-composite-polymer-scaffolds-promotes-bone-repair
#4
O Guillaume, M A Geven, C M Sprecher, V A Stadelmann, D W Grijpma, T T Tang, L Qin, Y Lai, M Alini, J D de Bruijn, H Yuan, R G Richards, D Eglin
Fabrication of composite scaffolds using stereolithography (SLA) for bone tissue engineering has shown great promises. However, in order to trigger effective bone formation and implant integration, exogenous growth factors are commonly combined to scaffold materials. In this study, we fabricated biodegradable composite scaffolds using SLA and endowed them with osteopromotive properties in the absence of biologics. First we prepared photo-crosslinkable poly(trimethylene carbonate) (PTMC) resins containing 20 and 40 wt...
March 7, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28273370/features-of-papillary-thyroid-microcarcinoma-associated-with-lateral-cervical-lymph-node-metastasis
#5
Min Ji Jeon, Mi Sun Chung, Hyemi Kwon, Mijin Kim, Suyeon Park, Jung Hwan Baek, Dong Eun Song, Tae-Yon Sung, Suck Joon Hong, Tae Yong Kim, Won Bae Kim, Young Kee Shong, Jeong Hyun Lee, Won Gu Kim
OBJECTIVES: Papillary thyroid microcarcinoma (PTMC) has an excellent prognosis with an indolent disease course. However, some PTMCs have an aggressive course with lateral cervical lymph node (LCLN) metastasis or distant metastasis. This study aimed to evaluate the preoperative features of PTMC associated with LCLN metastasis. DESIGN AND PATIENTS: This retrospective cohort study with a nested, matched case-control design included 199 PTMC patients with LCLN metastasis at initial surgery (N1b group) and 196 PTMC patients without any LN metastasis or persistent disease (N0 NED group) as controls; primary tumour sizes were matched...
March 8, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28272218/preoperative-predictors-of-lateral-neck-lymph-node-metastasis-in-papillary-thyroid-microcarcinoma
#6
Zheng Liu, Jianyong Lei, Yang Liu, Yuxia Fan, Xiaoming Wang, Xiubo Lu
Lateral lymph node metastasis (LNM) is not uncommon in papillary thyroid microcarcinoma (PTMC). Our present study aimed to investigate the risk factors associated with lateral LNM in PTMC.We retrospectively collected data pertaining to 366 patients with PTMC who underwent surgery at our center from 2010 to 2015. These patients were divided into the following 2 groups: a lateral LNM-positive group and a lateral LNM-negative group. Clinical and ultrasound data were compared between the 2 groups to determine the risk factors associated with lateral LNM...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28243084/efficient-induction-of-antimicrobial-activity-with-vancomycin-nanoparticle-loaded-poly-trimethylene-carbonate-localized-drug-delivery-system
#7
Yang Zhang, Ruo-Jia Liang, Jiao-Jiao Xu, Li-Feng Shen, Jian-Qing Gao, Xu-Ping Wang, Na-Ni Wang, Dan Shou, Ying Hu
Surgery and the local placement of an antibiotic are the predominant therapies to treat chronic osteomyelitis. Vancomycin-loaded N-trimethyl chitosan nanoparticles (VCM/TMC NPs) as a potential drug delivery system have high intracellular penetration and effective intracellular antibacterial activity. This study investigated the effects of a biocompatible material, poly(trimethylene carbonate) (PTMC), to increase the sustained effectiveness of an intracellular antibiotic and its potential application in antibiotic delivery...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28201917/parallel-tempering-monte-carlo-combined-with-clustering-euclidean-metric-analysis-to-study-the-thermodynamic-stability-of-lennard-jones-nanoclusters
#8
Henrique M Cezar, Gustavo G Rondina, Juarez L F Da Silva
A basic requirement for an atom-level understanding of nanoclusters is the knowledge of their atomic structure. This understanding is incomplete if it does not take into account temperature effects, which play a crucial role in phase transitions and changes in the overall stability of the particles. Finite size particles present intricate potential energy surfaces, and rigorous descriptions of temperature effects are best achieved by exploiting extended ensemble algorithms, such as the Parallel Tempering Monte Carlo (PTMC)...
February 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28194993/preoperative-prediction-of-papillary-thyroid-microcarcinoma-via-multiparameter-ultrasound
#9
Hui Juan Ma, Jing Chun Yang, Zhen Peng Leng, Ying Chang, Hua Kang, Liang Hong Teng
Background Accurate diagnosis of papillary thyroid microcarcinoma (PTMC) is important for further management. Ultrasound (US) is the most frequently used imaging modality for PTMC. Purpose To evaluate the diagnostic value of conventional US, contrast-enhanced ultrasound (CEUS) and real-time elastography (RTE) for patients with PTMC. Material and Methods In total, 135 patients with subcentimeter thyroid nodules who underwent conventional US, CEUS, and RTE before surgery were enrolled. A multivariate logistic regression analysis was performed to assess the independent predictors of PTMC...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28165584/triblock-copolymers-based-on-%C3%AE%C2%B5-caprolactone-and-trimethylene-carbonate-for-the-3d-printing-of-tissue-engineering-scaffolds
#10
Aysun Güney, Jos Malda, Wouter J A Dhert, Dirk W Grijpma
BACKGROUND: Biodegradable PCL-b-PTMC-b-PCL triblock copolymers based on trimethylene carbonate (TMC) and ε-caprolactone (CL) were prepared and used in the 3D printing of tissue engineering scaffolds. Triblock copolymers of various molecular weights containing equal amounts of TMC and CL were prepared. These block copolymers combine the low glass transition temperature of amorphous PTMC (approximately -20°C) and the semi-crystallinity of PCL (glass transition approximately -60°C and melting temperature approximately 60°C)...
February 1, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28156153/should-multifocal-papillary-thyroid-carcinomas-classified-as-t1a-having-the-sum-of-tumor-diameters-1-2-centimeter-be-reclassified-as-t1b
#11
Abbas Ali Tam, Didem Ozdemir, Berna Evranos Ogmen, Sevgul Fakı, Ersin Gurkan Dumlu, Aylin Kılıc Yazgan, Reyhan Ersoy, Bekir Cakır
OBJECTIVE: Considering the diameter of the largest tumor while determining T stage in multifocal papillary thyroid microcarcinomas (PTMC) might cause underestimation of tumoral stage. We aimed to investigate the effect of total tumor diameter (TTD) on TNM classification in multifocal T1a PTMCs. METHODS: T1 tumors were grouped as T1a and T1b according to 7th TNM edition. For patients with multifocal T1a, TTD (the sum of the maximal diameter of each foci) was calculated and these patients were further subgrouped as TTD ≤1 cm and TTD 1-2 cm...
February 3, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28130621/is-male-gender-a-prognostic-factor-for-papillary-thyroid-microcarcinoma
#12
Yi Ho Lee, Yu Mi Lee, Tae Yon Sung, Jong Ho Yoon, Dong Eun Song, Tae Yong Kim, Jung Hwan Baek, Jin Suk Ryu, Ki Wook Chung, Suck Joon Hong
BACKGROUND: Male gender is a prognostic factor of poor outcome in papillary thyroid carcinoma (PTC). We investigated the prognostic role of male gender in papillary thyroid microcarcinoma (PTMC). METHODS: We included 2930 patients who underwent surgery at Asan Medical Center for PTC. Clinicopathologic characteristics from the patients' medical records were compared for male and female PTC patients. Independent prognostic factors for recurrence in PTC and PTMC were evaluated after propensity score matching analysis...
January 27, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28125992/diagnostic-accuracy-of-ultrasonographic-features-for-lymph-node-metastasis-in-papillary-thyroid-microcarcinoma-a-single-center-retrospective-study
#13
Zeming Liu, Wen Zeng, Chunping Liu, Shuntao Wang, Yiquan Xiong, Yawen Guo, Xiaoyu Li, Shiran Sun, Tianwen Chen, Yusufu Maimaiti, Pan Yu, Tao Huang
BACKGROUND: Whether sonography is an appropriate imaging modality for cervical lymph nodes in patients with papillary thyroid microcarcinoma (PTMC) remains unclear. Hence, this study aimed to evaluate the diagnostic value of ultrasonography (US) features for lymph node metastasis in PTMC. METHODS: Seven hundred twelve patients with PTMC who underwent conventional ultrasonography examinations of the cervical lymph nodes were included. All included cases underwent total thyroidectomy plus prophylactic central lymph node dissection...
January 26, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28123728/clinicopathological-features-for-predicting-central-and-lateral-lymph-node-metastasis-in-papillary-thyroid-microcarcinoma-analysis-of-66-cases-that-underwent-central-and-lateral-lymph-node-dissection
#14
Yang Tao, Chongjie Wang, Liye Li, Haijun Xing, Yun Bai, Bing Han, Zhiyan Liu, Xiangshan Yang, Shourong Zhu
Currently the surgical approach for papillary thyroid microcarcinoma (PTMC), particularly the range of lymph node dissection, remains controversial. The present study aims to evaluate the risk factors for central and lateral lymph node metastasis (CLNM and LLNM) for appropriate clinical decision of neck lymph node dissection in PTMC. A total of 66 cases of PTMC that underwent unilateral or bilateral lobectomy plus prophylactic cervical lymph node dissection were collected for clinicopathological evaluation, including age, gender, tumor size, subtypes, extrathyroidal invasion, multifocality, calcifications, loss of cellular polarity/cohesiveness (LOP/C) in the invasive front, CLNM and LLNM, and retrospectively analysis...
January 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28109462/can-ratio-of-the-biggest-tumor-diameter-to-total-tumor-diameter-be-a-new-parameter-in-the-differential-diagnosis-of-agressive-and-favorable-multifocal-papillary-thyroid-microcarcinoma
#15
Abbas Ali Tam, Didem Özdemir, Neslihan Çuhacı, Hüsniye Başer, Ahmet Dirikoç, Cevdet Aydın, Aylin Kılıç Yazgan, Reyhan Ersoy, Bekir Çakır
OBJECTIVES: In this study, we aimed to evaluate the usefulness of a new parameter -ratio of the biggest tumor diameter to total tumor diameter- for the differentiation of agressive and favorable papillary thyroid microcarcinomas (PTMC). MATERIALS AND METHODS: The diameter of the biggest tumor focus was taken as the primary tumor diameter. Total tumor diameter was calculated as the sum of the maximal diameter of each lesion. Ratio of primary tumor diameter to total tumor diameter was defined as tumor diameter ratio (TDR)...
February 2017: Oral Oncology
https://www.readbyqxmd.com/read/28108237/poly-trimethylene-carbonate-based-composite-materials-for-reconstruction-of-critical-sized-cranial-bone-defects-in-sheep
#16
Ni Zeng, Anne C van Leeuwen, Dirk W Grijpma, Ruud R M Bos, Roel Kuijer
PURPOSE: The use of ceramic materials in repair of bone defects is limited to non-load-bearing sites. We tested poly(trimethylene carbonate) (PTMC) combined with β-tricalcium phosphate or biphasic calcium phosphate particles for reconstruction of cranial defects. MATERIALS AND METHODS: PTMC-calcium phosphate composite matrices were implanted in cranial defects in sheep for 3 and 9 months. Micro-computed tomography quantification and histological observation were performed for analysis...
December 18, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28106127/-225-%C3%AE-habit-planes-in-martensitic-steels-from-the-ptmc-to-a-continuous-model
#17
Annick P Baur, Cyril Cayron, Roland E Logé
Fine twinned microstructures with {225}γ habit planes are commonly observed in martensitic steels. The present study shows that an equibalanced combination of twin-related variants associated to the Kurdjumov-Sachs orientation relationship is equivalent to the Bowles and Mackenzie's version of the PTMC for this specific {225}γ case. The distortion associated to the Kurdjumov-Sachs orientation relationship results from a continuous modeling of the FCC-BCC transformation. Thus, for the first time, an atomic path can be associated to the PTMC...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28103203/the-change-in-nt-pro-bnp-and-post-ptmc-echocardiography-parameters-in-patients-with-mitral-stenosis-a-pilot-study
#18
Morteza Safi, Fariba Bayat, Zahra Ahmadi, Masood Shekarchizadeh, Isa Khaheshi, Mohammadreza Naderian
BACKGROUND: The change in the level of NT-Pro-BNP (N-terminal Pro-Brain Natriuretic Peptide) is now considered as a reflection of the hemodynamic alterations and its circulatory reductions reported early after successful PTMC (percutaneous transvenous mitral commissurotomy). The present study aims to assess the change in the level of NT-Pro BNP following PTMC in patients with mitral stenosis and also to determine the association between circulatory NT-Pro BNP reduction and post-PTMC echocardiography parameters...
January 18, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/28089996/a-comparison-of-lobectomy-and-total-thyroidectomy-in-patients-with-papillary-thyroid-microcarcinoma-a-retrospective-individual-risk-factor-matched-cohort-study
#19
COMPARATIVE STUDY
Hyemi Kwon, Min Ji Jeon, Won Gu Kim, Suyeon Park, Mijin Kim, Dong Eun Song, Tae-Yon Sung, Jong Ho Yoon, Suck Joon Hong, Tae Yong Kim, Young Kee Shong, Won Bae Kim
OBJECTIVE: Papillary thyroid microcarcinoma (PTMC) accounts for most of the increase in thyroid cancer in recent decades. We compared clinical outcomes and surgical complications of lobectomy and total thyroidectomy (TT) in PTMC patients. DESIGN AND METHODS: In this retrospective individual risk factor-matched cohort study, 2031 patients with PTMC were initially included. Patients who underwent lobectomy or TT were one-to-one matched according to individual risk factors, including age, sex, primary tumor size, extrathyroidal extension, multifocality and cervical lymph node (LN) metastasis...
April 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28074794/acute-effect-of-treatment-of-mitral-stenosis-on-left-atrium-function
#20
Atooshe Rohani, Shahram Kargar, Afsoon Fazlinejad, Fereshte Ghaderi, Vida Vakili, Homa Falsoleiman, Ramin Khamene Bagheri
AIM: Peak atrial longitudinal strain (PALS) is used to evaluate left atrium (LA) function in patients with mitral stenosis (MS), before and after percutaneous transmitral commissurotomy (PTMC) and mitral valve replacement (MVR). METHODS: Patients with severe symptomatic MS, who were referred to our echocardiographic laboratory for a diagnostic examination before cardiac surgery or PTMC from October of 2014 to October of 2015, were included in the study. RESULT: The peak systolic global LA strain improved post-PTMC (P < 0...
January 2017: Annals of Cardiac Anaesthesia
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