keyword
MENU ▼
Read by QxMD icon Read
search

Anterior pituitary

keyword
https://www.readbyqxmd.com/read/29770288/infrasellar-endoscopic-endonasal-approach-for-a-pituitary-adenoma-extending-into-the-third-ventricle-with-anterior-displacement-of-the-pituitary-gland
#1
Georgios A Zenonos, Eric W Wang, Juan Carlos Fernandez-Miranda
Objectives  The current video presents the nuances of the infrasellar endoscopic endonasal approach for a pituitary adenoma extending into the third ventricle, with anterior displacement of the pituitary gland. Design  The video analyzes the presentation, preoperative workup and imaging, surgical steps and technical nuances of the surgery, the clinical outcome, and follow-up imaging. Setting  The patient was treated by a skull base team consisting of a neurosurgeon and an ENT surgeon at a teaching academic institution...
February 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29756419/growth-hormone-and-aging-updated-review
#2
REVIEW
Andrzej Bartke
Role of growth hormone (GH) in mammalian aging is actively explored in clinical, epidemiological, and experimental studies. The age-related decline in GH levels is variously interpreted as a symptom of neuroendocrine aging, as one of causes of altered body composition and other unwelcome symptoms of aging, or as a mechanism of natural protection from cancer and other chronic diseases. Absence of GH signals due to mutations affecting anterior pituitary development, GH secretion, or GH receptors produces an impressive extension of longevity in laboratory mice...
May 11, 2018: World Journal of Men's Health
https://www.readbyqxmd.com/read/29755523/hypophyseal-involvement-in-immunoglobulin-g4-related-disease-a-retrospective-study-from-a-single-tertiary-center
#3
Yang Liu, Linjie Wang, Wen Zhang, Hui Pan, Hongbo Yang, Kan Deng, Lin Lu, Yong Yao, Shi Chen, Xiaofeng Chai, Feng Feng, Hui You, Zimeng Jin, Huijuan Zhu
This study aims to outline the clinical features and outcomes of IgG4-related hypophysitis (IgG4-RH) patients in a tertiary medical center. We reviewed clinical manifestations and imaging and pituitary function tests at baseline, as well as during follow-up. Ten patients were included. The mean age at diagnosis of IgG4-RH was 48.4 (16.0-64.0) years. An average of 3 (0-9) extrapituitary organs were involved. Five patients had panhypopituitarism, three had only posterior hypopituitarism, one had only anterior hypopituitarism, and one had a normal pituitary function...
2018: International Journal of Endocrinology
https://www.readbyqxmd.com/read/29754010/influence-of-brain-plasmalogen-changes-on-gonadotropin-secretion-from-the-cultured-bovine-anterior-pituitary-cells
#4
O Kereilwe, K Pandey, H Kadokawa
We recently discovered that the orphan G-protein-coupled receptor (GPR) 61 colocalized with GnRH receptors (GnRHRs) on the surface of most of bovine gonadotrophs. A recent study suggested that ethanolamine plasmalogen (PI) is a ligand for GPR61 in mouse neuroblastoma. Therefore, this study evaluated the hypothesis that PI alters LH and FSH secretion from cultured bovine anterior pituitary (AP) cells. We prepared bovine AP cells from postpubertal heifers (26 mo old) and cultured the cells for 3.5 d. We treated the cells with increasing concentrations (0, 5, 50, 500, 5,000, 50,000, or 500,000 pg/mL) of phosphoethanolamine PI (PEPI) extracted from the bovine brain, or l-α-lysophosphatidylethanolamine PI (LEPI) extracted from the bovine brain, for 5 min before either no treatment or GnRH stimulation...
April 10, 2018: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29750275/endoscopic-endonasal-transclival-approach-to-the-ventral-brainstem-anatomic-study-of-the-safe-entry-zones-combining-fiber-dissection-technique-with-7-tesla-magnetic-resonance-guided-neuronavigation
#5
Alessandro Weiss, Paolo Perrini, Matteo De Notaris, Guadalupe Soria, Alarcon Carlos, Maura Castagna, Lodovico Lutzemberger, Orazio Santo Santonocito, Giuseppe Catapano, Amin Kassam, Alberto Prats Galino
BACKGROUND: Treatment of intrinsic lesions of the ventral brainstem is a surgical challenge that requires complex skull base antero- and posterolateral approaches. More recently, endoscopic endonasal transclival approach (EETA) has been reported in the treatment of selected ventral brainstem lesions. OBJECTIVE: In this study we explored the endoscopic ventral brainstem anatomy with the aim to describe the degree of exposure of the ventral safe entry zones. In addition, we used a newly developed method combining traditional white matter dissection with high-resolution 7T magnetic resonance imaging (MRI) of the same specimen coregistered using a neuronavigation system...
May 10, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29743865/somatopause-weaknesses-of-the-therapeutic-approaches-and-the-cautious-optimism-based-on-experimental-ageing-studies-with-soy-isoflavones
#6
REVIEW
Vladimir Z Ajdžanovic, Svetlana Trifunovic, Dragana Miljic, Branka Šošic-Jurjevic, Branko Filipovic, Marko Miler, Nataša Ristic, Milica Manojlovic-Stojanoski, Verica Miloševic
The pathological phenomenon of somatopause, noticeable in hypogonadal ageing subjects, is based on the growth hormone (GH) production and secretion decrease along with the fall in GH binding protein and insulin-like growth factor 1 (IGF-1) levels, causing different musculoskeletal, metabolic and mental issues. From the perspective of safety and efficacy, GH treatment is considered to be highly controversial, while some other therapeutic approaches (application of IGF-1, GH secretagogues, gonadal steroids, cholinesterase-inhibitors or various combinations) exhibit more or less pronounced weaknesses in this respect...
2018: EXCLI journal
https://www.readbyqxmd.com/read/29736228/height-shape-and-anterior-posterior-diameter-of-pituitary-gland-on-magnetic-resonance-imaging-among-patients-with-multiple-sclerosis-compared-to-normal-individuals
#7
Mohammad Saba, Hossein Ali Ebrahimi, Habibeh Ahmadi-Pour, Mohammad Khodadoust
Background: Several studies indicate contribution of hypothalamus-pituitary-adrenal (HPA) axis in multiple sclerosis (MS) disease. This study was designed to determine whether there is an effective difference in pituitary height, shape, and anterior-posterior diameter (APD) between patients with MS and the control group. Methods: In this study, sagittal pituitary height and APD of 134 men and women (64 patients with MS and 70 healthy subjects as control group) were measured by T1 sequence magnetic resonance imaging (MRI)...
October 7, 2017: Iranian Journal of Neurology
https://www.readbyqxmd.com/read/29733861/effects-of-puerarin-on-estrogen-regulated-gene-expression-in-gonadotropin-releasing-hormone-pulse-generator-of-ovariectomized-rats
#8
Panida Loutchanwoot, Tina Vortherms
Effects of puerarin on the hypothalamic gonadotropin-releasing hormone (GnRH) pulse generator function is investigated, for the first time, in ovariectomized rats at the level of mRNA expression of estrogen-responsive genes, e.g., estrogen receptor (ER), GnRH and its receptor (GnRHR). Rats were treated orally for 90 days either with a soy-free diet containing two different doses of puerarin (low dose of 600 mg/kg and high dose of 3000 mg/kg) or estradiol benzoate (E2B) at either low dose (4.3 mg/kg) or high dose (17...
May 4, 2018: Steroids
https://www.readbyqxmd.com/read/29721578/circumventricular-organs-of-human-brain-visualized-on-post-contrast-3d-fluid-attenuated-inversion-recovery-imaging
#9
Minako Azuma, Toshinori Hirai, Yoshihito Kadota, Zaw Aung Khant, Yohei Hattori, Mika Kitajima, Hiroyuki Uetani, Yasuyuki Yamashita
PURPOSE: Although contrast-enhanced three-dimensional T2 fluid-attenuated inversion recovery (3D T2-FLAIR) images are useful for assessing various neuronal diseases, physiological enhancement of the circumventricular organs on the images have not been investigated. We aimed to assess the physiological appearance of the circumventricular organs on contrast-enhanced 3D T2-FLAIR images. METHODS: We studied 3-T MR images of the brain of 30 individuals with no apparent brain abnormalities...
May 2, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29713535/hyperprolactinaemia-in-male-infertility-clinical-case-scenarios
#10
Zeinab Dabbous, Stephen L Atkin
Objective: To explore the evaluation, treatment and impact of hyperprolactinaemia on male infertility and testicular function, as hyperprolactinaemia is commonly detected during the evaluation of infertile men. Methods: A literature search was performed using MEDLINE/PubMed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to identify all studies exploring hyperprolactinaemia in male infertility. Results: Elevated levels of serum prolactin have a detrimental effect on male reproduction through inhibition of the pulsatile release of gonadotrophins from the anterior pituitary gland, and a direct effect on spermatogenesis...
March 2018: Arab Journal of Urology
https://www.readbyqxmd.com/read/29701827/differential-responses-of-the-hpa-axis-to-mild-blast-traumatic-brain-injury-in-male-and-female-mice
#11
Ashley L Russell, M Riley Richardson, Bradly M Bauman, Ian M Hernandez, Samantha Saperstein, Robert J Handa, T John Wu
Traumatic brain injury (TBI) affects 10 million people world-wide, annually. TBI is linked to increased risk of psychiatric disorders. TBI induced by explosive devices has a unique phenotype. Over 1/3 of people exposed to blast-induced (b)TBI have prolonged neuroendocrine deficits, shown by anterior pituitary dysfunction. Dysregulation of the hypothalamus-pituitary-adrenal (HPA) axis is linked to increased risk for psychiatric disorders. Not only is there limited information on how the HPA axis responds to mild (m)bTBI, sex differences are understudied...
April 25, 2018: Endocrinology
https://www.readbyqxmd.com/read/29692900/a-case-of-kallmann-syndrome-associated-with-a-non-functional-pituitary-microadenoma
#12
Taieb Ach, Hela Marmouch, Dorra Elguiche, Asma Achour, Hajer Marzouk, Hanene Sayadi, Ines Khochtali, Mondher Golli
Kallmann syndrome (KS) is a form of hypogonadotropic hypogonadism in combination with a defect in sense of smell, due to abnormal migration of gonadotropin-releasing hormone-producing neurons. We report a case of a 17-year-old Tunisian male who presented with eunuchoid body proportions, absence of facial, axillary and pubic hair, micropenis and surgically corrected cryptorchidism. Associated findings included anosmia. Karyotype was 46XY and hormonal measurement hypogonadotropic hypogonadism. MRI of the brain showed bilateral agenesis of the olfactory bulbs and 3...
2018: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29684040/differentiation-capacities-of-ps-clusters-adult-pituitary-stem-progenitor-cell-clusters-located-in-the-parenchymal-niche-of-the-rat-anterior-lobe
#13
Saishu Yoshida, Naoto Nishimura, Hideaki Yurino, Masaaki Kobayashi, Kotaro Horiguchi, Kentaro Yano, Shin-Ichi Hashimoto, Takako Kato, Yukio Kato
Pituitary endocrine cells are supplied by Sox2-expressing stem/progenitor cells in the anterior lobe of the adult pituitary. In relation to their microenvironment ("niche"), SOX2-positive cells exist in two types of niches; the marginal cell layer-niche and the parenchymal-niche. Recently, we isolated dense stem/progenitor cell clusters from the parenchymal-niche as parenchymal stem/progenitor cell (PS)-clusters. We classified these PS-clusters into three subtypes based on differences in S100β-expression (S100β-positive, -negative, and -mixed type), and reported that S100β-positive PS-clusters exhibited the capacity for differentiation into endocrine cells under 3-dimensional cultivation system...
2018: PloS One
https://www.readbyqxmd.com/read/29671958/synoptic-reporting-of-pituitary-magnetic-resonance-imaging
#14
Rana S Dhillon, James A King, Tony Goldschlager, Yi Yuen Wang
BACKGROUND: Pituitary adenomas are common, often asymptomatic tumours that are diagnosed incidentally by magnetic resonance imaging (MRI) of the brain. There is considerable variation in the reporting of pituitary MRI, in part because there is no consensus as to what information should be included in such reports. Synoptic reporting consists of using structured checklists to standardize communication. It has been adopted in the surgical pathology literature and more recently in the breast imaging field...
April 19, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29671688/a-guide-to-identification-and-selection-of-axial-planes-in-magnetic-resonance-imaging-of-the-brain
#15
Shoichiro Otake, Toshiaki Taoka, Masayuki Maeda, William Tc Yuh
For brain magnetic resonance (MR) examination, three-dimensional imaging is commonly performed. Radiologists need to know the appropriate imaging angle for viewing. We present six imaging angles for the axial images. Each angle is determined by the reference line. The landmarks on the midsagittal MR image to determine the angle of the reference lines are as follows: the supraorbito-meatal line (the center of the mammillary body and the fastigium of the fourth ventricle), the orbito-meatal (OM) line (the center of the mammillary body and the most posterior point of the cerebellar tentorium), the Talairach anterior commissure (AC)-posterior commissure (PC) line (the superior edge of the AC and the inferior edge of the PC), the Schaltenbrand AC-PC line (the center of the AC and the center of the PC), the subcallosal line (the inferior border of the genu and the inferior border of the splenium of the corpus callosum), Reid's baseline (the center of the pituitary gland and the most posterior point of the cerebellar tentorium) and the brainstem vertical line (the line perpendicular to the posterior border of the brainstem)...
January 1, 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29663010/septo-optic-dysplasia-assessment-of-associated-findings-with-special-attention-to-the-olfactory-sulci-and-tracts
#16
John C Benson, David Nascene, Charles Truwit, Alexander M McKinney
PURPOSE: Septo-optic dysplasia is a congenital disorder consisting of optic nerve hypoplasia and absent septum pellucidum. While associated anomalies have been described, olfactory sulcus and bulb-tract hypoplasia have been scantily reported and was the focus of this study. METHODS: The picture archival and communications system and radiology information system (PACS-RIS) was searched over 15 years for patients with suspected septo-optic dysplasia (n = 41) and cerebral magnetic resonance imaging (MRI)...
April 16, 2018: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29659791/human-placental-growth-hormone-variant-in-pathological-pregnancies
#17
Shutan Liao, Mark H Vickers, Joanna L Stanley, Philip N Baker, Jo K Perry
Growth hormone (GH), an endocrine hormone primarily secreted from the anterior pituitary, stimulates growth, cell reproduction and regeneration and is a major regulator of postnatal growth. Humans have two GH genes which encode two versions of GH proteins: a pituitary version (GH-N/GH1), and a placental GH variant (GH-V/GH2) which is expressed in the syncytiotrophoblast and extravillous trophoblast cells of the placenta. During pregnancy, placental GH replaces pituitary GH in the maternal circulation at mid-late gestation as the major circulating form of GH...
April 6, 2018: Endocrinology
https://www.readbyqxmd.com/read/29658387/identification-of-avian-vasotocin-receptor-subtype-specific-antagonists-involved-in-the-stress-response-of-the-chicken-gallus-gallus
#18
Seong W Kang, Srinivas Jayanthi, Gurueswar Nagarajan, Thallapuranam Krishnaswamy Suresh Kumar, Wayne J Kuenzel
Vasotocin 1a and 1b receptors (V1aR and V1bR) have been shown to play important roles in the neuroendocrine regulation of stress responses via the anterior pituitary (AP) of birds. To identify effective subtype-specific antagonists for the chicken V1aR (cV1aR) and cV1bR, potential antagonists to the mammalian V1R were screened against the cV1aR and cV1bR 3D structural models by molecular docking analysis with determination of binding pocket / amino acid residues involved in the interaction. The antagonistic effects of the selected ligands were examined by measuring pro-opiomelanocortin (POMC) heteronuclear RNA (hnPOMC) levels following the in vitro stress administration to primary chicken AP cells...
April 16, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29652231/endoscopic-endonasal-transoculomotor-triangle-approach-for-adenomas-invading-the-parapeduncular-space-surgical-anatomy-technical-nuances-and-case-series
#19
Cristian Ferrareze Nunes, Stefan Lieber, Huy Q Truong, Georgios Zenonos, Eric W Wang, Carl H Snyderman, Paul A Gardner, Juan C Fernandez-Miranda
OBJECTIVE Pituitary adenomas may extend into the parapeduncular space by invading through the roof of the cavernous sinus. Currently, a transcranial approach is the preferred choice, with or without the combination of an endonasal approach. In this paper the authors present a novel surgical approach that takes advantage of the natural corridor provided by the tumor to further open the oculomotor triangle and resect tumor extension into the parapeduncular space. METHODS Six injected specimens were used to demonstrate in detail the surgical anatomy related to the approach...
April 13, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29650689/role-of-mri-t2-drive-in-the-assessment-of-pituitary-stalk-abnormalities-without-gadolinium-in-pituitary-diseases
#20
Elisabetta Godano, Giovanni Morana, Natascia Di Iorgi, Angela Pistorio, Anna Elsa Maria Allegri, Flavia Napoli, Roberto Gastaldi, Annalisa Calcagno, Giuseppa Patti, Annalisa Gallizia, Sara Notarnicola, Marta Giaccardi, Serena Noli, Mariasavina Severino, Domenico Tortora, Andrea Rossi, Mohamad Maghnie
OBJECTIVE: To investigate the role of T2-DRIVE MRI sequence in the accurate measurement of pituitary stalk (PS) size and the identification of PS abnormalities in patients with hypothalamic-pituitary disorders without the use of gadolinium. DESIGN: This was a retrospective study conducted on 242 patients who underwent MRI due to pituitary dysfunction between 2006 - 2015. Among 135 eligible patients, 102 showed eutopic posterior pituitary (PP) gland and 33 showed "ectopic" PP (EPP)...
April 12, 2018: European Journal of Endocrinology
keyword
keyword
103156
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"