Publications by authors named "Krystallenia Alexandraki"

Rates of recurrence and/or persistence of Cushing's disease after surgical treatment are high. Recently, advances in molecular insights and a better understanding of pathophysiology have enabled the development of potential therapeutic targets that could control adrenocorticotropic hormone (ACTH) and cortisol secretion or even reduce tumour cell proliferation. At the pituitary level, pasireotide is an approved somatostatin receptor ligand, and compounds targeting cell cycle regulation, cell signalling and epigenetics are now under investigation.

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  • The study investigates the expression of Erythropoietin-producing hepatocellular (EPH) receptors in neuroendocrine neoplasms (NENs), which are significant in various biological processes including tumor growth and spread.
  • Immunohistochemical analysis of tumor samples from 30 patients showed varying levels of expression for different EPH subtypes, with high positivity rates for EPH-A4 and EPH-A5.
  • The findings suggest that EPH receptors could play a crucial role in the development and treatment of NENs, highlighting their potential as targets for new therapeutic strategies.
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The parasellar region is the anatomical area around the sella turcica that represents a crucial crossroad for important adjacent structures. Several distinct tumors can primarily originate from this area, the most common being meningiomas, gliomas, embryonal cell tumors, germ cell tumors, and craniopharyngiomas. In addition, a number of systemic and inflammatory disorders can also affect the parasellar region, most commonly involving the pituitary.

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Background: Poorly differentiated thyroid carcinoma (PDTC) has an intermediate prognosis between indolent well-differentiated thyroid carcinoma (TC) and anaplastic carcinoma. Herein, we present a case report with a PDTC component, along with a systematic review of the literature.

Case Report: We report a case of a 45-year-old man diagnosed with a PDTC component, along with hobnail and tall-cell variant features positive for BRAFV600E mutation, after a total thyroidectomy and neck dissection.

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  • * These hereditary tumors tend to occur earlier in life, can be multiple, and may also involve other tumors in different organs due to genetic mutations affecting cell growth and regulation.
  • * Early detection and specialized follow-up are critical for managing these tumors, with genetic screening recommended for children and diagnostic measures starting in adolescence, necessitating a multidisciplinary approach for effective treatment.
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  • Von-Hippel-Lindau (VHL) is a genetic disorder that leads to tumors and cysts in various organs, and this case discusses a 23-year-old woman with VHL who developed rare gastric neuroendocrine tumors (gNENs) while also suffering from chronic autoimmune gastritis (CAG).
  • The gNENs observed in this patient showed characteristics similar to those typically seen in VHL-related tumors, despite gNENs not being commonly associated with VHL.
  • The findings suggest that the formation of clear-cell gNENs might be influenced more by CAG rather than just VHL, highlighting the importance of careful monitoring of such tumors in patients before ruling out VHL disease
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Pituitary tumours (PTs) are the second most common intracranial tumour. Although the majority show benign behaviour, they may exert aggressive behaviour and can be resistant to treatment. The aim of this review is to report the recently identified biomarkers that might have possible prognostic value.

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The World Health Organization classification of pituitary tumours, published in 2022, supported a change in the terminology from "pituitary adenoma" to "pituitary neuroendocrine tumour" (PitNET). The neuroendocrine cells represent an integral part of the diffuse neuroendocrine system, including, among others, thyroid C cells, the parathyroid chief cells, and the anterior pituitary. Normal and neoplastic adenohypophyseal neuroendocrine cells have light microscopic, ultrastructural features and an immunoprofile compatible with the neuroendocrine cells and neuroendocrine tumours from other organs.

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  • * Treatment typically starts with first-generation somatostatin analogues (SSAs) for managing hypoglycemia, but if those fail, options like second-generation SSAs and everolimus may be considered for their blood sugar-regulating effects.
  • * Peptide receptor radionuclide therapy (PRRT) is highlighted as a promising option for both insulinomas and glucagonomas when surgery and SSAs do not effectively control the symptoms or the cancer, ultimately improving patient outcomes.
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Urothelial cancer is a common neoplasm and metastatic disease correlates with a poor prognosis. Isolated adrenal gland metastases of urothelial carcinoma are quite rare, and management options can decide a patient's prognosis. Herein we report the case of a 76-year-old man with a metachronous solitary adrenal metastasis from a bladder carcinoma, who underwent adrenalectomy as part of his treatment.

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Background: Somatostatin analogues (SSAs) are the cornerstone of treatment for carcinoid syndrome (CS)-related symptoms. The aim of this systematic review and meta-analysis is to evaluate the percentage of patients achieving partial (PR) or complete response (CR) with the use of long-acting SSAs in patients with CS.

Methods: A systematic electronic literature search was conducted in PubMed, Cochrane, and Scopus to identify eligible studies.

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Diabetes insipidus (DI) is a disorder characterised by the excretion of large amounts of hypotonic urine, with a prevalence of 1 per 25,000 population. Central DI (CDI), better now referred to as arginine vasopressin (AVP)-deficiency, is the most common form of DI resulting from deficiency of the hormone AVP from the pituitary. The less common nephrogenic DI (NDI) or AVP-resistance develops secondary to AVP resistance in the kidneys.

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The 100th anniversary of the discovery of vitamin D3 (VitD3) coincides with significant recent advances in understanding its mechanism of action along with accumulating knowledge concerning its genomic and nongenomic activities. A close relationship between VitD3 and the immune system, including both types of immunity, innate and adaptive, has been newly identified, while low levels of VitD3 have been implicated in the development of autoimmune thyroiditis (AIT). Active 1,25(OH) D3 is generated in immune cells via 1-α-hydroxylase, subsequently interacting with the VitD3 receptor to promote transcriptional and epigenomic responses in the same or adjacent cells.

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Although papillary thyroid carcinoma (PTC) is considered to have an excellent prognosis, some recently identified more aggressive variants show reduced overall survival rates. Hobnail PTC (HPTC) was newly recognized as one of these aggressive forms, affecting recurrence, metastasis, and overall survival rates. Herein, we performed a systematic review and meta-analysis of studies including cases or case series with patients with HPTC.

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Introduction: Adrenal insufficiency is a disorder characterized by the failure of adrenocortical function because of distorted function of hypothalamic-pituitary- adrenal (HPA) axis. Pregnancy is a state of a physiological glucocorticoid excess as the HPA axis is functioning at a higher level.

Purpose Of Review: The aim of the present review was to shed light on current evidence of adrenal insufficiency management during pregnancy, along with maternal and neonatal outcomes.

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  • Researchers looked at how cortisol, a hormone, affects the death rates in people with adrenal incidentalomas, which are growths on the adrenal glands found by accident.
  • They studied over 3,600 patients from different countries to see if high cortisol levels linked to more health problems and heart issues.
  • The study found that out of the patients, about 10% died over an average of 7 years, and they analyzed other health conditions that might be related to these adrenal growths.
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From the mid-18th century to the mid-20th century, Greek doctors in Smyrna collaborated with pharmacists, churches, and the city's Greek Orthodox community to create a state of-the-art health network and charitable foundation to serve physical and mental health needs of the local community. At Graekikon Nosokomion o Agios Haralampos (Greek Saint Charalampos Hospital), or the Greek Hospital, every citizen, regardless of origin, language, religion, or economic status, had access to the most appropriate medical and pharmaceutical care. Neighborhood pharmacists complemented this care by administering vaccinations and preparing medicines.

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Craniopharyngiomas are rare benign neoplasms presenting in two different types, adamantinomatous (ACP) or papillary (PCP), which are molecularly and clinically distinct. Traditional treatment includes surgical resection and radiotherapy, which are accompanied by a number of debilitating complications because of the tumours' proximity to important brain structures. Recent advances in the understanding of molecular pathogenesis of craniopharyngiomas have opened horizons to medical therapeutic options.

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Polycystic ovary syndrome (PCOS) is a heterogeneous syndrome, with long-term sequelae from birth to senescence. The long-term effects of PCOS are attributed to several metabolic aberrations ensuing the syndrome. In a systematic review of literature regarding the cardiovascular risk factors that accompany PCOS, we found that macrovascular function has been assessed by flow-mediated dilatation (FMD), microvascular function by venous occlusion plethysmography (VOP), and arterial structure by ultrasonographic assessment of intima-media thickness (IMT) usually of the carotid artery.

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Neuroendocrine neoplasms (NENs) are still considered to be rare neoplasms, and their epidemiology has been classically studied in large population-based cancer registries. Besides the benefits and the limitations that a cancer registry may have for all the registered cancers, the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) Programme, has a number of drawbacks for the study of NENs. The change in management of NENs, either from diagnostic or from therapeutic points of view, the role of the Ki-67 labelling index and introduction of sensitive functional imaging, along with the misclassification of the more benign types of NENs, are the main limitations of the prognostic ability of the SEER data-base, particularly when including older data.

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Introduction: Primary aldosteronism (PA) is the most common cause of endocrine hypertension, mainly caused by aldosterone-producing adenomas or hyperplasia; understanding its pathophysiological background is important in order to provide ameliorative treatment strategies. Over the past several years, significant progress has been documented in this field, in particular in the clarification of the genetic and molecular mechanisms responsible for the pathogenesis of aldosterone-producing adenomas (APAs).

Methods: Systematic searches of the PubMed and Cochrane databases were performed for all human studies applying transcriptomic, epigenetic or metabolomic analyses to PA subjects.

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Following improvements in the management and outcome of neuroendocrine neoplasms (NENs) in recent years, we see a subset, particularly of pancreatic NENs, which become more aggressive during the course of the disease. This is reflected by an increase in the Ki-67 labelling index, as a marker of proliferation, which may lead to an occasion of increase in grading, but generally does not appear to be correlated with histologically confirmed dedifferentiation. A systematic review of the literature was performed in PubMed, Cochrane Library, and Embase until May 2020 to identify cases that have behaved in such a manner.

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Purpose: Primary aldosteronism (PA) is the most frequent type of endocrine hypertension. In our previous studies, we introduced two modified diagnostic tests for PA, the post-dexamethasone saline infusion test (DSIT) and the overnight dexamethasone, captopril, and valsartan test (DCVT). In this study, we aimed to validate both tests in respect to the biochemical and clinical response of a cohort of hypertensive patients in pre- and post-surgical setting.

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