Pituitary Tumors
Mostrando 1-12 de 128 artigos, teses e dissertações.
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1. A novel mutation in PRKAR1A gene in a patient with Carney complex presenting with pituitary macroadenoma, acromegaly, Cushing's syndrome and recurrent atrial myxoma
SUMMARY Carney complex (CNC) is a rare syndrome of multiple endocrine and non-endocrine tumors. In this paper we present a 23-year-old Iranian woman with CNC who harbored a novel mutation (c.642dupT) in PRKAR1A gene. This patient presented with pituitary macroadenoma, acromegaly, recurrent atrial myxoma, Cushing's syndrome secondary to primary pigmented nodu
Arch. Endocrinol. Metab.. Publicado em: 2021-06
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2. Ectopic Cushing syndrome in Colombia
ABSTRACT Objective The aim was to describe the clinical features of patients with ectopic Cushing syndrome (ECS) from Colombia and compare these findings with other series to provide the best management for these patients. Materials and methods Records of patients with ECS from 1986 to 2017 were retrospectively reviewed; patients with a diagnosis of adre
Arch. Endocrinol. Metab.. Publicado em: 2020-12
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3. Effect of lncRNA HULC knockdown on rat secreting pituitary adenoma GH3 cells
Pituitary adenoma is one of the most common tumors in the neuroendocrine system. This study investigated the effects of long non-coding RNAs (lncRNAs) highly up-regulated in liver cancer (HULC) on rat secreting pituitary adenoma GH3 cell viability, migration, invasion, apoptosis, and hormone secretion, as well as the underlying potential mechanisms. Cell tra
Braz J Med Biol Res. Publicado em: 15/04/2019
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4. Supposed pituitary-production of human chorionic Gonadotropin induced by androgen deprivation therapy
ABSTRACT Introduction: The main cause of slightly elevated human chorionic gonadotropin (HCG) after successful treatment of male germ cell tumors is considered to be pituitary-derived HCG. It is well known that pituitary-derived HCG is frequently detected in postmenopausal women. We evaluated the status of serum HCG in men with elevated gonadotropins, which
Int. braz j urol.. Publicado em: 2019-01
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5. Study of major genetic factors involved in pituitary tumorigenesis and their impact on clinical and biological characteristics of sporadic somatotropinomas and non-functioning pituitary adenomas
Genetic and functional aberrations of guanine nucleotide-binding protein, alpha stimulating (GNAS), aryl hydrocarbon receptor interacting protein (AIP), and pituitary tumor transforming gene (PTTG) are among the most prominent events in pituitary tumorigenesis. A cohort of Brazilian patients with somatotropinomas (n=41) and non-functioning pituitary adenomas
Braz J Med Biol Res. Publicado em: 25/06/2018
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6. Expression of E-cadherin, Slug and NCAM and its relationship to tumor invasiveness in patients with acromegaly
Pituitary adenomas account for 10–15% of primary intracranial tumors. Growth hormone (GH)-secreting adenomas account for 13% of all pituitary adenomas and cause acromegaly. These tumors can be aggressive, invade surrounding structures and are highly recurrent. The objective of this study was to evaluate E-cadherin, Slug and neural cell adhesion molecule (N
Braz J Med Biol Res. Publicado em: 11/12/2017
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7. Endoscopic versus microscopic transsphenoidal surgery in the treatment of pituitary tumors: systematic review and meta-analysis of randomized and non-randomized controlled trials
ABSTRACT We conducted a systematic review and meta-analysis of randomized and non-randomized controlled trials that compared pure endoscopic with microscopic transsphenoidal surgery (TSS) in the resection of pituitary tumors. Embase, PubMed, Lilacs, and Central Cochrane were used as our data sources. The outcomes were total tumor resection, achievement of bi
Arch. Endocrinol. Metab.. Publicado em: 05/09/2016
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8. A review on the diagnosis and treatment of patients with clinically nonfunctioning pituitary adenoma by the Neuroendocrinology Department of the Brazilian Society of Endocrinology and Metabolism
ABSTRACT Clinically nonfunctioning pituitary adenomas (NFPA) are the most common pituitary tumors after prolactinomas. The absence of clinical symptoms of hormonal hypersecretion can contribute to the late diagnosis of the disease. Thus, the majority of patients seek medical attention for signs and symptoms resulting from mass effect, such as neuro-ophthalmo
Arch. Endocrinol. Metab.. Publicado em: 2016-08
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9. Evolution of Minimally Invasive Approaches to the Sella and Parasellar Region
Introduction Given advancements in endoscopic image quality, instrumentation, surgical navigation, skull base closure techniques, and anatomical understanding, the endonasal endoscopic approach has rapidly evolved into a widely utilized technique for removal of sellar and parasellar tumors. Although pituitary adenomas and Rathke cleft cysts constitute the
Int. Arch. Otorhinolaryngol.. Publicado em: 2014
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10. ANÁLISE DA EXPRESSÃO DOS RECEPTORES DA SOMATOSTATINA (SST1-5) E DA DOPAMINA (DR2) EM ADENOMAS HIPOFISÁRIOS / ANALYSIS OF EXPRESSION OF THE RECEPTORS OF THE SOMATOSTATIN (SST1-5) AND DOPAMINE (DR2) IN PITUITARY ADENOMAS
Pituitary tumors represent 15% of intracranial neoplasms and are usually benign. The treatment primary is surgical resection with exception for prolactinomas because dopamine agonists are very effective in the treatment these tumors. If surgery does not lead to healing, it is necessary other therapeutic strategy in a attempt to control hormone levels and tum
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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11. RNAi-mediated knockdown of pituitary tumor- transforming gene-1 (PTTG1) suppresses the proliferation and invasive potential of PC3 human prostate cancer cells
Pituitary tumor-transforming gene-1 (PTTG1) is a proto-oncogene that promotes tumorigenesis and metastasis in numerous cell types and is overexpressed in a variety of human tumors. We have demonstrated that PTTG1 expression was up-regulated in both human prostate cancer specimens and prostate cancer cell lines. For a more direct assessment of the function of
Braz J Med Biol Res. Publicado em: 2012-11
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12. Mutation and genomic amplification of the PIK3CA proto-oncogene in pituitary adenomas
The tumorigenesis of pituitary adenomas is poorly understood. Mutations of the PIK3CA proto-oncogene, which encodes the p110-α catalytic subunit of PI3K, have been reported in various types of human cancers regarding the role of the gene in cell proliferation and survival through activation of the PI3K/Akt signaling pathway. Only one Chinese study described
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-09