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The glycoprotein-secreting pituitary adenomas comprise two distinctive clinical and pathological entities, the gonadotroph and the thyrotroph cell pituitary adenomas. Although they can be grouped together for producing hormones and/or subunits that are glycoproteins, these tumors originate from distinctive cell types (gonadotrophes and thyrotrophes) that are only remotely related. Gonadotroph cell adenomas are among the commonest types of pituitary adenomas, corresponding to the majority of the so-called "nonfunctioning" or clinically silent adenomas, while thyrotroph cell adenomas are extremely rare and usually present with hyperthyroidism due to inappropriate TSH secretion. In this article, we review the literature covering epidemiological, pathological, pathogenetic, clinical, diagnostic and therapeutic aspects of gonadotroph and thyrotroph cell adenomas. Greater emphasis was given to the growing field of molecular pathogenesis of pituitary tumors in general, and a special effort was made to contrast molecular alterations found in these tumors with other tumor types. On the practical side, the authors extensive experience for more than two decades in the diagnosis and management of these tumors at the Neuroendocrine Unit (Endocrinology Division, Unifesp) was used to balance the extensive literature on this subject.
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http://dx.doi.org/10.1590/s0004-27302005000500007 | DOI Listing |
Expert Opin Pharmacother
December 2024
Pituitary Center, Oregon Health & Science University, Portland, OR, USA.
Clin Endocrinol (Oxf)
December 2024
Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.
Objective: Many review articles have explored data regarding the coexistence of specific types of pituitary adenomas (PAs) and polycystic ovary syndrome (PCOS), particularly focusing on the potential pathogenesis of this intersection and overlapping features. However, a comprehensive evaluation encompassing the full spectrum of PAs and their association with PCOS remains lacking. This review aims to provide a broad assessment of the interactions between these entities, emphasizing pathophysiological mechanisms, clinical presentations, diagnostic challenges and therapeutic implications.
View Article and Find Full Text PDFChilds Nerv Syst
December 2024
Department of Pediatric Neurosurgery, Medical University of Silesia, Katowice, Poland.
Introduction: Adamantinomatous craniopharyngiomas (ACP) are rare epithelial tumors, which by the WHO are classified as non-malignant tumors. Despite radical tumor regression, almost 57% of patients develop a craniopharyngioma recurrence. The pathogenesis of epithelial cancers involves a process called epithelial-mesenchymal transition (EMT), which is involved in tumor progression and its invasion, and the loss of E-cadherin is crucial for this process.
View Article and Find Full Text PDFEndocrinol Diabetes Metab Case Rep
October 2024
Summary: Paediatric pituitary adenomas are rare in children and adolescents and differ from adults in both clinical presentation and management. We present the case of a 14-year-old female with primary amenorrhoea secondary to a macroprolactinoma, showing a modest radiological and biochemical response to dopamine agonist (DA) therapy. Despite a 10-month duration of increasing DA therapy, initial symptoms of primary amenorrhoea and hyperprolactinaemia persisted, with new symptoms of weight gain, lethargy and low mood.
View Article and Find Full Text PDFFront Surg
December 2024
Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, Shandong, China.
Background: The surgical treatment of pituitary adenomas (PAs) is aimed at achieving maximal tumor resection, relieving the compression, and correcting the disorders of pituitary hormones. Parasellar dural invasion is a primary factor in the failure of the surgery. By comparing the two operations of tumor excision combined with resection of the medial wall of the cavernous sinus (MW) and simple tumor excision, we further confirmed the clinical effectiveness and safety of the resection technique of the MW.
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