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https://www.readbyqxmd.com/read/28400578/elevated-levels-of-wnt-signaling-disrupt-thymus-morphogenesis-and-function
#1
Jeremy B Swann, Christiane Happe, Thomas Boehm
All vertebrates possess a thymus, whose epithelial microenvironment is essential for T cell development and maturation. Despite the importance of the thymus for cellular immune defense, many questions surrounding its morphogenesis remain unanswered. Here, we demonstrate that, in contrast to the situation in many other epithelial cell types, differentiation of thymic epithelial cells (TECs) proceeds normally in the absence of canonical Wnt signaling and the classical adhesion molecule E-cadherin. By contrast, TEC-intrinsic activation of β-catenin-dependent Wnt signaling blocks the morphogenesis of the thymus, and overexpression of a secreted Wnt ligand by TECs dominantly modifies the morphogenesis not only of the thymus, but also of the parathyroid and thyroid...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28400402/molecular-targeted-therapies-in-adrenal-pituitary-and-parathyroid-malignancies
#2
Anna Angelousi, Georgios K Dimitriadis, Gn Zografos, Svenja Nölting, Gregory A Kaltsas, Ashley B Grossman
Tumourigenesis is a relatively common event in endocrine tissues. Currently, specific guidelines have been developed for common malignant endocrine tumours which also incorporate advances in molecular targeted therapies (MTT), as in thyroid cancer and gastrointestinal neuroendocrine malignancies. However, there is little information regarding the role and efficacy of MTT in the relatively rare malignant endocrine tumours mainly involving the adrenal medulla, adrenal cortex, pituitary and parathyroid glands...
April 11, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28386723/effects-of-sample-storage-and-diluents-in-the-reliability-of-thyroglobulin-measurement-in-the-washout-of-fine-needle-aspirates
#3
Fanny Piotrkowski-Viale, Adriana Reyes, Alicia Dios, Fabian Pitoia, Alicia Lowenstein, Patricia Glikman
OBJECTIVE: To evaluate two variables affecting Thyroglobulin stability in the washout of fine needle aspiration biopsies of thyroid nodules and metastatic lymph nodes. MATERIALS AND METHODS: Thyroglobulin stability after storage at -20 °C up to 14 days was studied in washout performed with normal saline solution and further dilutions with normal saline solution from five metastatic thyroid nodes and six benign thyroid nodules. We also studied thyroglobulin stability in diluents compared with normal saline solution: 4% bovine serum albumin in normal saline solution and diluents free from thyroglobulin or Calcitonin or parathyroid hormone in paired and simultaneous thyroglobulin measurements of washout dilutions from 5/6 benign thyroid nodules and 2/5 metastatic lymph nodes...
April 6, 2017: Endocrine
https://www.readbyqxmd.com/read/28384917/delayed-post-surgical-hypoparathyroidism-the-forgotten-chameleon
#4
Sangita Deepak Kamath, Balllamudi Srinivas Rao
Delayed hypoparathyroidism, due to accidental gland removal or ischemia of parathyroids can present many years after thyroidectomy and symptoms may be non-specific. This condition, if not diagnosed timely, may prove fatal and have serious consequences. Hence, clinicians must have a high index of suspicion to treat this condition. All patients with a history of previous thyroid surgery, who come with vague symptoms like fatigue, muscle aches should undergo estimation of serum calcium, phosphorus and Parathyroid Hormone (PTH) due to the lack of any pathognomonic features of hypoparathyroidism...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28374221/less-is-more-time-to-expand-the-indications-for-minimally-invasive-video-assisted-parathyroidectomy
#5
S Bakkar, V Matteucci, C Corsini, S Pagliaro, P Miccoli
PURPOSE: Minimally invasive video-assisted parathyroidectomy (MIVAP) is one of the most widespread targeted parathyroid surgeries for primary hyperparathyroidism (PHP). The aim of this study was to assess its limits and propose an expansion of its indications in the management of parathyroid pathology. METHODS: A retrospective analysis of 77 consecutive patients who underwent MIVAP for PHP between Jan and Oct 2016 was conducted. The adequacy of the procedure and/or the need to convert to a standard cervicotomy was the main outcome of interest...
April 3, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28371486/identification-of-parathyroid-tissue-in-thyroid-fine-needle-aspiration-a-combined-approach-using-cytology-immunohistochemical-and-molecular-methods
#6
Robert P Domingo, Lorna L Ogden, Laura C Been, Giulia C Kennedy, S Thomas Traweek
OBJECTIVES: Parathyroid (PT) lesions can be difficult to recognize in thyroid fine needle aspirations (FNAs), and when not identified correctly, PT cells may be mistaken for potentially abnormal thyroid cells. We therefore studied the utility of combining cytology, immunohistochemistry, and a molecular classifier to identify PT cells in thyroid FNAs. METHODS: Thyroid FNAs were received in CytoLyt, and were evaluated initially using The Bethesda System for Reporting Thyroid Cytology (TBSRTC)...
March 30, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28370683/management-of-unilateral-recurrent-laryngeal-nerve-injury-after-thyroid-surgery-a-review
#7
REVIEW
Jeremy Lynch, Rajeev Parameswaran
BACKGROUND: Recurrent laryngeal nerve (RLN) damage because of thyroid and parathyroid surgery has been recognized for over a century. Injury rates have been slowly decreasing in this period while effective treatment strategies have been increasing. METHODS: Recent literature was evaluated on the topics of anatomy, pathophysiology, avoidance, and conservative and surgical treatment of RLN injury. Data for this literature review were identified by PubMed and references from relevant articles using the search terms "thyroid," "laryngeal nerve," and "injury...
April 3, 2017: Head & Neck
https://www.readbyqxmd.com/read/28364157/increased-identification-of-parathyroid-glands-using-near-infrared-light-during-thyroid-and-parathyroid-surgery
#8
Jorge Falco, Fernando Dip, Pablo Quadri, Martin de la Fuente, Marcos Prunello, Raúl J Rosenthal
BACKGROUND: Parathyroid gland (PG) identification during thyroid and parathyroid surgery is challenging. Accidental parathyroidectomy increases the rate of postoperative hypocalcaemia. Recently, autofluorescence with near infrared light (NIRL) has been described for PG visualization. The aim of this study is to analyze the increased rate of visualization of PGs with the use of NIRL compared to white light (WL). MATERIALS AND METHODS: All patients undergoing thyroid and parathyroid surgery were included in this study...
March 31, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28363614/acute-symptomatic-hypocalcemia-from-immune-checkpoint-therapy-induced-hypoparathyroidism
#9
Myint Aung Win, Kyaw Zin Thein, Aiham Qdaisat, Sai-Ching Jim Yeung
BACKGROUND: Ipilimumab (a monoclonal antibody against CTLA-4) and nivolumab (a humanized antibody against PD-1) target these immune checkpoint pathways and are used for treatment of melanoma and an increasing number of other cancers. However, they may cause immune-related adverse effects (IRAEs). Although many endocrinopathies are known to be IRAEs, primary hypoparathyroidism with severe hypocalcemia has never been reported. This is the first case of hypoparathyroidism as an IRAE presenting to an Emergency Department with acute hypocalcemia...
February 27, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28362393/two-techniques-to-create-hypoparathyroid-mice-parathyroidectomy-using-gfp-glands-and-diphtheria-toxin-mediated-parathyroid-ablation
#10
Ruiye Bi, Yi Fan, En Luo, Quan Yuan, Michael Mannstadt
Hypoparathyroidism (HP) is a disorder characterized by low levels of PTH which lead to hypocalcemia, hyperphosphatemia, and low bone turnover. The most common cause of the disease is accidental removal of the parathyroid glands during thyroid surgery. Novel therapies for HP are needed, but testing them requires reliable animal models of acquired HP. Here, we demonstrate the generation of two mouse models of acquired HP. In the GFP-PTX model, mice with green fluorescent protein (GFP) expressed specifically in the parathyroids (PTHcre-mTmG) were created by crossing PTHcre(+) mice with Rosa-mTmG(fl/fl) mice...
March 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28357106/persistent-arthralgia-vomiting-and-hypercalcemia-as-the-initial-manifestations-of-hyperthyroidism-a-case-report
#11
Jingfang Liu, Xulei Tang, Jianguo Cheng, Xiaomei Yang, Yan Wang
A 53-year-old woman presented with persistent edema and pain of the metacarpophalangeal and proximal interphalangeal joints and the wrist, knee and ankle joints, with more recent intermittent nausea and vomiting. Treatment for rheumatoid arthritis and osteoarthritis was ineffective. No clinical manifestations typical of hyperthyroidism were observed. The results of the thyroid function tests were as follows: Thyroid-stimulating hormone, 0.003 µIU/ml; triiodothyronine (T3), 4.44 ng/ml;, thyroxine (T4) >30 µg/dl; free T3, 14...
February 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28315908/positive-99m-tc-mibi-and-the-subtraction-parathyroid-scan-are-related-to-intact-parathyroid-hormone-but-not-to-total-plasma-calcium-in-primary-hyperparathyroidism
#12
Sanja Dugonjić, Marija Šišić, Marija Radulović, Boris Ajdinović
OBJECTIVE: Primary hyperparathyroidism (pHPT) is characterised by increased parathyroid hormone (PTH) secretion and consequently increased plasma calcium. During the last few decades parathyroid scintigraphy (PS), is applied in almost all patients with pPHT before surgery and specifically before minimally invasive parathyroidectomy. The aim of this study was to find the best cut-off levels of total plasma calcium and intact PTH (iPTH) that correlate with positive technetium-99m-methoxy isobutyl isonitrile ((99m)Tc-MIBI) PS and with positive subtraction PS (SPS) in patients with pHPT and thus the positive diagnostic value of these PS...
January 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28314958/unilateral-vocal-fold-immobility-a-tertiary-hospital-s-experience-over-5-years
#13
Vyas M N Prasad, Raja Fakhoury, Diane Helou, Georges Lawson, Marc Remacle
The objective of the study was to determine the etiology and subsequent management of patients with unilateral vocal fold immobility (UVFI) and compare our results with other such studies. This was a retrospective case series of all patients that were treated for UVFI at one single tertiary referral centre between 2010 and 2014. The medical records of 161 patients over a 5-year period diagnosed with UVFI were analyzed. We looked at the patient demographics, side of immobility, etiology, management and voice assessment...
March 17, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28303870/-transoral-approach-to-thyroid-gland-in-the-experiment
#14
A M Shulutko, V I Semikov, S E Gryaznov, A V Gorbacheva, A R Patalova, G T Mansurova, Yu A Boblak
AIM: To develop minimally invasive and safe endoscopic access to thyroid gland. MATERIAL AND METHODS: Transoral pre-mandibular video-assisted gas-free access to thyroid gland was developed in experimental study that included 19 human cadavers. Stereometric modeling defined the evaluation criteria including the form of basal arch of lower jaw and its height. There was no conflict of instruments in working chamber under platysma. Additional trocar was deployed to resolve the conflict between working parts of instruments during thyroid gland mobilization...
2017: Khirurgiia
https://www.readbyqxmd.com/read/28296787/unintentional-parathyroidectomy-during-total-thyroidectomy-surgery-a-single-surgeon-s-experience
#15
Wei Du, Qigen Fang, Xu Zhang, Meng Cui, Ming Zhao, Weihua Lou
In this study, we investigated incidental parathyroidectomy during total thyroidectomy surgery that required central lymph node dissection and the potential risk factors. Patients requiring total thyroidectomy and tracheoesophageal groove node dissection were enrolled in the study from January 2013 to June 2015 and we obtained all medical information, including pathology reports. Furthermore, we recorded the parathyroid hormone level in all patients prior to operation and then 3 further times: 1 day, 1 week, and 3 months after surgery...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28287628/prevalence-of-hypovitaminosis-d-and-associated-factors-in-obese-spanish-children
#16
T Durá-Travé, F Gallinas-Victoriano, M J Chueca-Guindulain, S Berrade-Zubiri
BACKGROUND/OBJECTIVES: Vitamin D deficiency may contribute to endocrine health and disease (diabetes, autoimmune thyroid diseases, polycystic ovarian syndrome, etc.). The aim of this study was to determine the prevalence and specific factors for hypovitaminosis D among children stratified by body mass index (BMI) in Northern Spain. SUBJECTS/METHODS: A cross-sectional clinical (sex, age, season of study visit, place of residence and BMI) and blood testing (calcium, phosphorous, calcidiol and parathyroid hormone (PTH)) were accomplished in 546 Caucasian individuals (aged 3...
March 13, 2017: Nutrition & Diabetes
https://www.readbyqxmd.com/read/28280507/fine-needle-aspiration-of-thyroid-nodules-using-the-bethesda-system-for-reporting-thyroid-cytopathology-an-institutional-experience-in-a-rural-setting
#17
Aili Guo, Yuuki Kaminoh, Terra Forward, Frank L Schwartz, Scott Jenkinson
Background. Fine needle aspiration (FNA) remains the first-line diagnostic in management of thyroid nodules and reduces unnecessary surgeries. However, it is still challenging since cytological results are not always straightforward. This study aimed to examine the results of thyroid FNA using the Bethesda system for reporting thyroid cytopathology (TBSRTC) to establish the level of accuracy of FNA procedures in a rural practice setting. Method. A retrospective chart review was conducted on existing thyroid FNA performed in a referral endocrine center between December 2011 and November 2015...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28280359/application-of-carbon-nanoparticles-in-lymph-node-dissection-and-parathyroid-protection-during-thyroid-cancer-surgeries-a-systematic-review-and-meta-analysis
#18
Lun Wang, Dong Yang, Jun-Yuan Lv, Dan Yu, Shi-Jie Xin
PURPOSE: To investigate whether carbon nanoparticles (CNs) are helpful in identifying lymph nodes and metastatic lymph nodes and in parathyroid protection during thyroid cancer surgery. METHODS: English and Chinese literature in PubMed, Cochrane Database of Systematic Reviews, EMBASE, ClinicalTrials.gov, China Biology Medicine Database, China National Knowledge Infrastructure, China Master's and Doctoral Theses Full-Text Database, Wanfang database, and Cqvip database were searched (till March 22, 2016)...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28274549/protease-inhibitor-associated-bone-mineral-density-loss-is-related-to-hypothyroidism-and-related-bone-turnover-acceleration
#19
Ei Kinai, Hiroyuki Gatanaga, Daisuke Mizushima, Takeshi Nishijima, Takahiro Aoki, Ikumi Genka, Katsuji Teruya, Kunihisa Tsukada, Yoshimi Kikuchi, Shinichi Oka
BACKGROUND: Clinical and experiments evidence indicate that protease inhibitors (PI) can cause bone mineral density (BMD) loss. However, the mechanism of such loss remains obscure. METHODS: This single-center, cross-sectional study included 184 HIV-infected patients treated with PI who underwent dual-energy X-ray absorptiometry scan. Serum phosphorus, percentage of tubular reabsorption of phosphate (%TRP), thyroid and parathyroid function (iPTH), vitamin D, osteocalcin (OC), urinary deoxypyridinoline (DPD), and urinary cross-linked N-telopeptide of type I collagen (u-NTx) were measured...
March 5, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28267706/hypoparathyroidism-after-thyroidectomy-prevention-assessment-and-management
#20
Rogerio A Dedivitis, Felipe T Aires, Claudio R Cernea
PURPOSE OF REVIEW: Permanent hypoparathyroidism is the most common long-term complication after total thyroidectomy and it can cause significant morbidity and increased costs. Its incidence varies from 30% to 60%. RECENT FINDINGS: The surgical technique and the extent of thyroidectomy are related to parathyroid injury and hypoparathyroidism. The glands should be identified in situ, carefully manipulated and preserved, as well as their vascularization. In case of incidental removal, routine autotransplantation is advocated...
April 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
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