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https://www.readbyqxmd.com/read/28643132/integrated-inflammatory-stress-itis-model
#1
Elisabeth O Bangsgaard, Poul G Hjorth, Mette S Olufsen, Jesper Mehlsen, Johnny T Ottesen
During the last decade, there has been an increasing interest in the coupling between the acute inflammatory response and the Hypothalamic-Pituitary-Adrenal (HPA) axis. The inflammatory response is activated acutely by pathogen- or damage-related molecular patterns, whereas the HPA axis maintains a long-term level of the stress hormone cortisol which is also anti-inflammatory. A new integrated model of the interaction between these two subsystems of the inflammatory system is proposed and coined the integrated inflammatory stress (ITIS) model...
June 22, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28642733/a-case-of-pulmonary-carcinoid-tumor-with-a-superimposed-aspergilloma-presenting-as-a-covert-ectopic-adrenocorticotropic-hormone-syndrome
#2
Kyoung Jin Kim, Ji Hee Yu, Nan Hee Kim, Young Hye Kim, Young Sik Kim, Ji A Seo
Ectopic adrenocorticotropic hormone (ACTH) syndrome is a challenging diagnosis only responsible for approximately 10% of Cushing syndrome cases. It has been associated with a variety of benign and malignant tumors including a carcinoid tumor accompanied by aspergilloma in our case that was significantly difficult to be detected. We report a patient over 70 years old with uncontrolled hypertension and hypokalemia presenting with generalized edema. Laboratory results revealed ACTH-dependent Cushing syndrome, but imaging studies did not show any discrete lesions secreting ACTH...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28642181/surgery-outcome-of-growth-hormone-secreting-pituitary-adenoma-with-empty-sella-using-a-new-classification
#3
Qiang Wang, Xiaopeng Guo, Lu Gao, Zihao Wang, Kan Deng, Wei Lian, Renzhi Wang, Huijuan Zhu, Bing Xing
OBJECTIVE: To investigate the outcomes and identified risk factors for a cure and intraoperative cerebrospinal fluid leak following transsphenoidal surgery using a new classification for growth hormone-secreting pituitary adenoma associated with "empty sella". METHODS: This retrospective cohort study included 51 patients enrolled from January 2010 to June 2016. All subjects were categorized into three groups using a new classification scheme: Grade A, whole tumor occupation area beneath a horizontal line drawn along the lowest level of ES; Grade B, tumor occupation area that crossed the horizontal line on one side; and Grade C, tumor occupation area that crossed the horizontal line on two sides...
June 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28639924/cushing-syndrome-diagnostic-workup-and-imaging-features-with-clinical-and-pathologic-correlation
#4
Nicolaus A Wagner-Bartak, Ali Baiomy, Mouhammed Amir Habra, Shalini V Mukhi, Ajaykumar C Morani, Brinda R Korivi, Steven G Waguespack, Khaled M Elsayes
OBJECTIVE: Cushing syndrome (CS) is a constellation of clinical signs and symptoms resulting from chronic exposure to excess cortisol, either exogenous or endogenous. Exogenous CS is most commonly caused by administration of glucocorticoids. Endogenous CS is subdivided into two types: adrenocorticotropic hormone (ACTH) dependent and ACTH independent. CONCLUSION: Cushing disease, which is caused by a pituitary adenoma, is the most common cause of ACTH-dependent CS for which pituitary MRI can be diagnostic, with bilateral inferior petrosal sinus sampling useful in equivocal cases...
July 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28634910/the-complex-biology-of-the-aryl-hydrocarbon-receptor-and-its-role-in-the-pituitary-gland
#5
REVIEW
Robert Formosa, Josanne Vassallo
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor best known for its ability to mediate the effects of environmental toxins such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD or dioxin), polycyclic aromatic hydrocarbons (PAHs), benzene, and polychlorinated biphenyls (PCBs) through the initiation of transcription of a number of metabolically active enzymes. Therefore, the AHR has been studied mostly in the context of xenobiotic signaling. However, several studies have shown that the AHR is constitutively active and plays an important role in general cell physiology, independently of its activity as a xenobiotic receptor and in the absence of exogenous ligands...
June 20, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28634705/how-does-pregnancy-affect-the-patients-with-pituitary-adenomas-a-study-on-113-pregnancies-from-turkey
#6
Z Karaca, S Yarman, I Ozbas, P Kadioglu, M Akturk, F Kilicli, H S Dokmetas, R Colak, H Atmaca, Z Canturk, Y Altuntas, N Ozbey, N Hatipoglu, F Tanriverdi, K Unluhizarci, F Kelestimur
OBJECTIVE: Data regarding pregnancies in relation to pituitary tumors are limited. The effects of pregnancy on pituitary adenomas and the effects of adenoma itself (hormonal activity, mass effects and pituitary insufficiency) and/or treatment on the ongoing gestation and developing fetus were evaluated. METHODS: The study was a retrospective study. A questionnaire involving questions regarding medical history before index gestation, history of related pregnancy, result of index gestation and postpartum follow-up of the patients was filled by the investigator in one of the eight Referral Endocrinology Centers from Turkey...
June 20, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28631277/spindle-cell-oncocytoma-of-adenohypophysis-review-of-literature-and-report-of-another-recurrent-case
#7
Akash Sali, Sridhar Epari, Chandralekha Tampi, Atul Goel
Spindle cell oncocytoma (SCO) of adenohypophysis was first described in 2002 by Roncaroli et al. as a new entity in the tumors originating from adenohypophysis. It was subsequently recognized as a distinct entity in the 2007 WHO classification of CNS tumors and retained in the current updated classification. In contrast to that suggested by the original authors, this tumor does have a potential for recurrence as first described by Kloub et al. and later with many such case reports. This tumor can be confused with other sellar tumors like pituicytomas and pituitary adenoma, both radiologically and histopathologically...
June 19, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28629376/radiation-therapy-for-older-patients-with-brain-tumors
#8
REVIEW
Giuseppe Minniti, Andrea Riccardo Filippi, Mattia Falchetto Osti, Umberto Ricardi
The incidence of brain tumors in the elderly population has increased over the last few decades. Current treatment includes surgery, radiotherapy and chemotherapy, but the optimal management of older patients with brain tumors remains a matter of debate, since aggressive radiation treatments in this population may be associated with high risks of neurological toxicity and deterioration of quality of life. For such patients, a careful clinical status assessment is mandatory both for clinical decision making and for designing randomized trials to adequately evaluate the optimal combination of radiotherapy and chemotherapy...
June 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28622680/optimized-multi-stable-stochastic-resonance-for-the-enhancement-of-pituitary-micoadenoma-in-mri
#9
Munendra Singh, Ashish Verma, Neeraj Sharma
Magnetic resonance imaging (MRI) is the modality of choice as far as imaging diagnosis of pathologies in the pituitary gland is concerned. Further, the advent of dynamic contrast enhanced (DCE) has enhanced the capability of this modality in detecting minute benign but endocrinologically significant tumors called microadenoma. These lesions are visible with difficulty and a low confidence level in routine MRI sequences, even after administration of intravenous gadolinium. Techniques to enhance the visualization of such foci would be an asset in improving the overall accuracy of DCE-MRI for detection of pituitary microadenomas...
June 13, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28620008/pten-dicer1-fh-and-their-associated-tumor-susceptibility-syndromes-clinical-features-genetics-and-surveillance-recommendations-in-childhood
#10
REVIEW
Kris Ann P Schultz, Surya P Rednam, Junne Kamihara, Leslie Doros, Maria Isabel Achatz, Jonathan D Wasserman, Lisa R Diller, Laurence Brugières, Harriet Druker, Katherine A Schneider, Rose B McGee, William D Foulkes
PTEN hamartoma tumor syndrome (PHTS), DICER1 syndrome, and hereditary leiomyomatosis and renal cell cancer (HLRCC) syndrome are pleiotropic tumor predisposition syndromes that include benign and malignant neoplasms affecting adults and children. PHTS includes several disorders with shared and distinct clinical features. These are associated with elevated lifetime risk of breast, thyroid, endometrial, colorectal, and renal cancers as well as melanoma. Thyroid cancer represents the predominant cancer risk under age 20 years...
June 15, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28616971/lack-of-cell-proliferative-and-tumorigenic-effects-of-4-hydroxyestradiol-in-the-anterior-pituitary-of-rats-role-of-ultrarapid-o-methylation-catalyzed-by-pituitary-membrane-bound-catechol-o-methyltransferase
#11
Pan Wang, Laura H Mills, Ji-Hoon Song, Jina Yu, Bao-Ting Zhu
In animal models, estrogens are complete carcinogens in certain target sites. 4-Hydroxyestradiol (4-OH-E2), an endogenous metabolite of 17β-estradiol (E2), is known to have prominent estrogenic activity plus potential genotoxicity and mutagenicity. We report here our finding that 4-OH-E2 does not induce pituitary tumors in ACI female rats, whereas E2 produces 100% pituitary tumor incidence. To probe the mechanism, we conducted a short-term animal experiment to compare the proliferative effect of 4-OH-E2 in several organs...
June 15, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28615294/pituitary-stem-cell-regulation-who-is-pulling-the-strings
#12
Benoit Cox, Heleen Roose, Annelies Vennekens, Hugo Vankelecom
The pituitary gland plays a pivotal role in the endocrine system, steering fundamental processes of growth, metabolism, reproduction and coping with stress. The adult pituitary contains resident stem cells which are highly quiescent in homeostatic conditions. However, the cells show marked signs of activation during processes of increased cell remodeling in the gland, including maturation at neonatal age, adaptation to physiological demands, regeneration upon injury, and growth of local tumors. Although functions of pituitary stem cells are slowly but gradually uncovered, their regulation largely remains virgin territory...
June 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28614036/an-individualized-approach-to-the-evaluation-of-cushing-syndrome
#13
Susmeeta T Sharma
Cushing syndrome (CS) is caused by chronic exposure to excess glucocorticoids. Early recognition and treatment of hypercortisolemia can lead to decreased morbidity and mortality. The diagnosis of CS and thereafter, establishing the cause can often be difficult, especially in patients with mild and cyclic hypercortisolism. Surgical excision of the cause of excess glucocorticoids is the optimal treatment for CS. Medical therapy (steroidogenesis inhibitors, medications that decrease adrenocorticotropic hormone [ACTH] levels or glucocorticoid antagonists) and pituitary radiotherapy may be needed as adjunctive treatment modalities in patients with residual, recurrent or metastatic disease, in preparation for surgery, or when surgery is contraindicated...
June 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28614007/ectopic-cushing-s-syndrome-a-ten-year-experience-from-a-tertiary-care-centre-in-southern-india
#14
Samantha Sathyakumar, Thomas Vizhalil Paul, Hesargatta Shyamsunder Asha, Birla Roy Gnanamuthu, M J Paul, Deepak Thomas Abraham, Simon Rajaratnam, Nihal Thomas
OBJECTIVE: Ectopic ACTH secretion is a less common cause of Cushing's syndrome, and is seen in 5 to 10% of cases with endogenous hypercortisolemia. We hereby describe our experience of patients with ectopic ACTH syndrome, who have been managed over the past 10 years at a tertiary care centre in Southern India. METHODS: The inpatient and outpatient records of patients from 2006 to 2015 were retrospectively reviewed. The clinical features, clinical history, biochemical values, imaging features which included radiological findings and PET scans, management, details of follow-up and outcomes were documented...
June 14, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28614003/biochemical-control-during-long-term-follow-up-of-230-adult-patients-with-cushing-s-disease-a-multi-center-retrospective-study
#15
Eliza B Geer, Ismat Shafiq, Murray B Gordon, Vivien Bonert, Alejandro Ayala, Ronald S Swerdloff, Laurence Katznelson, Yelena Lalazar, Ekaterina Manuylova, Karen J Pulaski-Liebert, John D Carmichael, Zeina Hannoush, Vijaya Surampudi, Michael S Broder, Dasha Cherepanov, Marianne Eagan, Jackie Lee, Qayyim Said, Maureen P Neary, Beverly Mk Biller
OBJECTIVES: Cushing's disease (CD) results from excessive exposure to glucocorticoids caused by an adrenocorticotropic hormone-secreting pituitary tumor. Inadequately-treated CD is associated with significant morbidity and elevated mortality. Multi-center data on CD patients treated in routine clinical practice are needed to assess treatment outcomes in this rare disorder. The study purpose was to describe the burden of illness and treatment outcomes for CD patients. METHODS: Eight pituitary centers in 4 US regions participated in this multi-center retrospective chart review study...
June 14, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28613975/activation-of-drd5-dopamine-receptor-d5-inhibits-tumor-growth-by-autophagic-cell-death
#16
Zhi Gen Leng, Shao Jian Lin, Ze Rui Wu, Yu Hang Guo, Lin Cai, Han Bing Shang, Hao Tang, Ya Jun Xue, Mei Qing Lou, Wenxiu Zhao, Wei-Dong Le, Wei Guo Zhao, Xun Zhang, Zhe Bao Wu
Dopamine agonists such as bromocriptine and cabergoline have been successfully used in the treatment of pituitary prolactinomas and other neuroendocrine tumors. However, their therapeutic mechanisms are not fully understood. In this study we demonstrated that DRD5 (dopamine receptor D5) agonists were potent inhibitors of pituitary tumor growth. We further found that DRD5 activation increased production of reactive oxygen species (ROS), inhibited the MTOR pathway, induced macroautophagy/autophagy, and led to autophagic cell death (ACD) in vitro and in vivo...
June 14, 2017: Autophagy
https://www.readbyqxmd.com/read/28608351/course-of-aggressive-somatotroph-corticotroph-and-mammotroph-tumors-under-temozolomide-report-of-three-cases-and-review-of-the-literature
#17
Berna İmge Aydoğan, Uğur Ünlütürk, Rıfat Emral, Sevim Güllü
Treatment of aggressive pituitary tumors may be challenging. Temozolomide (TMZ) is a promising agent when conventional treatment methods fail. We present three patients with aggressive pituitary tumors with atypical morphology, who were resistant to conventional treatments and treated with TMZ. First case had a somatotroph adenoma, second a corticotroph adenoma, and the third a macroprolactinoma. We also reviewed the literature reporting TMZ efficacy in somatotroph, corticotroph and mammotroph tumors of pituitary...
May 7, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28607877/recurrent-kidney-stone-episodes-leading-to-a-diagnosis-of-occult-acromegaly
#18
Julie N Thai, Timothy Y Tran, Oksana Davydov, Mantu Gupta
The association between nephrolithiasis and acromegaly has been previously described. Although the mechanism has been established, the urological literature sparsely discusses clinically suspecting that patients with recurrent nephrolithiasis could have acromegaly and subsequently referring them for accurate diagnosis and treatment. We present a case of occult acromegaly secondary to a pituitary tumor discovered 20 years after the patient's first stone episode.
September 2017: Urology Case Reports
https://www.readbyqxmd.com/read/28603683/cavernous-sinus-involvement-by-pituitary-adenomas-clinical-implications-and-outcomes-of-endoscopic-endonasal-resection
#19
Abdulrazag Ajlan, Achal S Achrol, Abdulrahman Albakr, Abdullah H Feroze, Erick M Westbroek, Peter Hwang, Griffith R Harsh
Background  Parasellar invasion of pituitary adenomas (PAs) into the cavernous sinus (CS) is common. The management of the CS component of PA remains controversial. Objective  The objective of this study was to analyze CS involvement in PA treated with endoscopic endonasal approaches, including incidence, surgical risks, surgical strategies, long-term outcomes, and our treatment algorithm. Methods  We reviewed a series of 176 surgically treated PA with particular attention to CS involvement and whether the CS tumor was approached medial or lateral to the internal carotid artery...
June 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28602880/intraoperative-scoring-system-to-predict-postoperative-remission-in-endoscopic-endonasal-transsphenoidal-surgery-for-growth-hormone-secreting-pituitary-adenomas
#20
Shigetoshi Yano, Naoki Shinojima, Junji Kawashima, Tatsuya Kondo, Takuichiro Hide
OBJECTIVE: This study aimed to determine the predictive factors for endocrinological remission of patients with growth hormone (GH)-secreting pituitary adenomas. METHODS: In 47 patients with GH-secreting pituitary adenomas who underwent endoscopic endonasal transsphenoidal surgery with intraoperative GH measurements from 2002 to 2011, the relationship between the intraoperative GH levels and postoperative remission was analyzed, and two items that predicted remission (GH half-life obtained 30 min or less after removal and a minimum surgical GH level less than 2...
June 5, 2017: World Neurosurgery
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