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Dive into the research topics where Konstantinos Kontzoglou is active.

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Featured researches published by Konstantinos Kontzoglou.


Oncology | 2013

Correlation between Ki67 and breast cancer prognosis.

Konstantinos Kontzoglou; Palla; Karaolanis G; Karaiskos I; Alexiou I; Pateras I; Konstantoudakis K; Michael Stamatakos

Background: Ki67 is an immunohistochemical proliferation marker in many types of cancer and has been widely studied among breast cancer patients mostly through retrospective studies. Methods: The MEDLINE/PubMed database was searched for publications with the medical subject heading ‘Ki 67’ and the key words ‘breast’, ‘cancer’, and ‘prognosis’. We restricted our search to articles published until 2012. Results: In this review, we included 78 articles and abstracts that were accessible and available in English. An effort to further explain the role of Ki67 in the prognosis of breast cancer has been made. Conclusions: The debate on the prognostic role of Ki67 in breast cancer is still open, although most of the studies have established a relation between Ki67 and overall and disease-free survival. Further research should be made in order to establish Ki67 as a standard prognostic marker in breast cancer.


World Journal of Surgical Oncology | 2010

Cell cyclins: triggering elements of cancer or not?

Michael Stamatakos; Victoria Palla; Ioannis Karaiskos; Konstantinos Xiromeritis; Ioannis Alexiou; Ioannis S. Pateras; Konstantinos Kontzoglou

Cyclins are indispensable elements of the cell cycle and derangement of their function can lead to cancer formation. Recent studies have also revealed more mechanisms through which cyclins can express their oncogenic potential. This review focuses on the aberrant expression of G1/S cyclins and especially cyclin D and cyclin E; the pathways through which they lead to tumour formation and their involvement in different types of cancer. These elements indicate the mechanisms that could act as targets for cancer therapy.


International Seminars in Surgical Oncology | 2009

Breast cancer incidence in Greek women in relation to ABO blood groups and Rh factor

Michael Stamatakos; Konstantinos Kontzoglou; Panagiotis Safioleas; Constnatinos Safioleas; Christina Manti; Michael Safioleas

AimTo investigate the correlation between breast cancer in Greek women and ABO blood groups.Material-methodsIn 166 female patients with breast cancer factors such as blood group, histological type, family history, presence or absence of nodal and/or distant metastases were examined. These patients had similar demographic, clinical, surgical, immunohistochemical, laboratory, and follow-up data and this group is representative of general population of women in Greece.ResultsThe ductal type of breast cancer was differentially distributed in blood groups Rh (+) (P ≤ 0.001). In patients with A (+) blood group the ductal type of breast cancer was present in 49.6% of cases, in relation to the other blood groups and in AB blood group the same type occurred rarely (3.6%). Rh (+) women with positive family history were more often found in A blood group. The relative risk of metastasis in Rh (-) patients was 4.2 times higher than that in Rh (+) patients. Among Rh (+) patients, the relative risk of metastasis was 1.29 times higher in A blood group than in other blood groups.ConclusionBlood group A is often associated with ductal breast cancer (49.6%), in contrast to the other blood groups and particularly to blood group AB (3.6%). Blood group A and, particularly, A (-) has the worst prognosis of all.


European Journal of Endocrinology | 2012

Mechanisms in endocrinology: primary HT and risk for breast cancer: a systematic review and meta-analysis.

Anna Angelousi; Valsamo Anagnostou; Michael Stamatakos; Georgios Georgiopoulos; Konstantinos Kontzoglou

OBJECTIVE The association between hypothyroidism and breast cancer has been described from very early on. Breast and thyroid tissue are interconnected on a molecular level mainly through activation of thyroid hormone receptors expressed on cells of the mammary gland as well as on the plasma membrane of breast cancer cells. Despite the experimental evidence the true value of hypothyroidism as a risk factor for breast cancer remains controversial. METHODS We searched the PubMed database through February 2011 to identify studies that evaluated the association between hypothyroidism and risk for breast cancer as well as the effect of thyroid hormone replacement therapy on breast cancer incidence. RESULTS A meta-analysis performed in 12 studies showed that hypothyroidism was not associated with risk for breast cancer (pooled risk ratio (RR)=1.06, 95% confidence intervals (CIs) 0.82-1.35, P = 0.672). The effect of treatment was assessed in seven studies and no evidence for an association between thyroid hormone replacement and breast cancer was observed with an overall RR of 0.99 (95% CI 0.73-1.35, P = 0.965). CONCLUSIONS Our meta-analysis showed that hypothyroidism is not associated with increased risk for breast cancer and thyroid hormone replacement therapy does not reduce breast cancer prevalence; however, the heterogeneity of the studies analyzed precludes firm conclusions.


European Journal of Endocrinology | 2011

Primary Hypothyroidism and Risk for Breast Cancer: A Systematic Review and Meta-Analysis

Anna Angelousi; Valsamo Anagnostou; Michael Stamatakos; Georgios C Georgiopoulos; Konstantinos Kontzoglou

OBJECTIVE The association between hypothyroidism and breast cancer has been described from very early on. Breast and thyroid tissue are interconnected on a molecular level mainly through activation of thyroid hormone receptors expressed on cells of the mammary gland as well as on the plasma membrane of breast cancer cells. Despite the experimental evidence the true value of hypothyroidism as a risk factor for breast cancer remains controversial. METHODS We searched the PubMed database through February 2011 to identify studies that evaluated the association between hypothyroidism and risk for breast cancer as well as the effect of thyroid hormone replacement therapy on breast cancer incidence. RESULTS A meta-analysis performed in 12 studies showed that hypothyroidism was not associated with risk for breast cancer (pooled risk ratio (RR)=1.06, 95% confidence intervals (CIs) 0.82-1.35, P = 0.672). The effect of treatment was assessed in seven studies and no evidence for an association between thyroid hormone replacement and breast cancer was observed with an overall RR of 0.99 (95% CI 0.73-1.35, P = 0.965). CONCLUSIONS Our meta-analysis showed that hypothyroidism is not associated with increased risk for breast cancer and thyroid hormone replacement therapy does not reduce breast cancer prevalence; however, the heterogeneity of the studies analyzed precludes firm conclusions.


BioMed Research International | 2012

How do cytokines trigger genomic instability

Ioannis L. Aivaliotis; Ioannis S. Pateras; Marilena Papaioannou; Christina Glytsou; Konstantinos Kontzoglou; Elizabeth O. Johnson; Vassilis Zoumpourlis

Inflammation is a double-edged sword presenting a dual effect on cancer development, from one hand promoting tumor initiation and progression and from the other hand protecting against cancer through immunosurveillance mechanisms. Cytokines are crucial components of inflammation, participating in the interaction between the cells of tumor microenvironment. A comprehensive study of the role of cytokines in the context of the inflammation-tumorigenesis interplay helps us to shed light in the pathogenesis of cancer. In this paper we focus on the role of cytokines in the development of genomic instability, an evolving hallmark of cancer.


Journal of Medical Case Reports | 2011

De Garengeot's hernia in a 60-year-old woman: A case report

Petros Konofaos; Eleftherios Spartalis; Anastasios Smirnis; Konstantinos Kontzoglou; Grigorios Kouraklis

IntroductionDe Garengeot first described the presence of the appendix within a femoral hernia in 1731.Case presentationWe report the case of a 66-year-old Caucasian woman who presented with acute appendicitis within an incarcerated femoral hernia. This is the first reported case of de Garengeots hernia in the Balkan area.ConclusionsAppropriate management without incurring any delay for radiological imaging can be promising for an uneventful postoperative course. The treatment of choice of this disease entity is emergency surgery and consists in simultaneous appendectomy through the hernia incision and primary hernia repair. In patients with large hernia defects or in older people the use of mesh for repairing the hernia defect can be an excellent choice.


International Journal of Surgery | 2012

Gastrocolic fistulae; From Haller till nowadays

Michael Stamatakos; Ioannis Karaiskos; Ioannis S. Pateras; Ioannis Alexiou; Charikleia Stefanaki; Konstantinos Kontzoglou

Gastrocolic Fistula is, in the majority of cases the pathological communication between stomach and transverse colon, because cases involved with the small intestine, pancreas and skin have been also documented, even though are rare. It occurs mostly in adults, but they can be present to infants, as well, as a result of congenital abnormalities or iatrogenic procedures (i.e. migration of PEG tube that placed before). In the Western Countries, the most common cause is the adenocarcinoma of the colon, while in Japan, adenocarcinoma of the stomach is the most frequent cause. It seldom appears, as a complication of a benign peptic ulcer, in Crohns disease and as a result of significant intake of steroids or NSAIDs. The typical symptoms of a gastrocolic fistula are abdominal pain, nausea-vomiting, diarrhea and weight loss. Radiology has been used for the detection of the fistulae all these years but the golden standard remained the barium enema. Barium meal and CT findings play a smaller role in the diagnosis. Although the management of gastrocolic fistulae has historically been surgical, medical treatment has recently been recommended as the first line when a malignancy can be excluded.


World Journal of Gastroenterology | 2017

From diagnosis to treatment of hepatocellular carcinoma: An epidemic problem for both developed and developing world

Dimitrios Dimitroulis; Christos Damaskos; Serena Valsami; Spyridon Davakis; Nikolaos Garmpis; Eleftherios Spartalis; Antonios Athanasiou; Demetrios Moris; Stratigoula Sakellariou; Stylianos Kykalos; Gerasimos Tsourouflis; Anna Garmpi; Ioanna Delladetsima; Konstantinos Kontzoglou; Gregory Kouraklis

Hepatocellular carcinoma (HCC) is the most frequent primary liver malignancy and the third cause of cancer-related death in the Western Countries. The well-established causes of HCC are chronic liver infections such as hepatitis B virus or chronic hepatitis C virus, nonalcoholic fatty liver disease, consumption of aflatoxins and tobacco smocking. Clinical presentation varies widely; patients can be asymptomatic while symptomatology extends from right upper abdominal quadrant paint and weight loss to obstructive jaundice and lethargy. Imaging is the first key and one of the most important aspects at all stages of diagnosis, therapy and follow-up of patients with HCC. The Barcelona Clinic Liver Cancer Staging System remains the most widely classification system used for HCC management guidelines. Up until now, HCC remains a challenge to early diagnose, and treat effectively; treating management is focused on hepatic resection, orthotopic liver transplantation, ablative therapies, chemoembolization and systemic therapies with cytotocix drugs, and targeted agents. This review article describes the current evidence on epidemiology, symptomatology, diagnosis and treatment of hepatocellular carcinoma.


Indian Journal of Surgery | 2014

Vesicovaginal Fistula: Diagnosis and Management

Michael Stamatakos; Constantina Sargedi; Theodora Stasinou; Konstantinos Kontzoglou

Vesicovaginal fistula (VVF) is still a major cause for concern in many developing countries. It represents a significant morbidity in female urology. Continual wetness, odor, and discomfort cause serious social problems. The diagnosis of the condition has traditionally been based on clinical methods and dye testing. A successful repair of such fistulas requires an accurate diagnostic evaluation and timely repair using procedures that exploit basic surgical principles and the application of interposition flaps. The method of closure depends on the surgeon’s training and experience. The main complication of VVF surgery is recurrent fistula formation.

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Gregory Kouraklis

National and Kapodistrian University of Athens

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Christos Damaskos

National and Kapodistrian University of Athens

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Michael Stamatakos

National and Kapodistrian University of Athens

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Eleftherios Spartalis

National and Kapodistrian University of Athens

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Michael Stamatakos

National and Kapodistrian University of Athens

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Dimitrios Dimitroulis

National and Kapodistrian University of Athens

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Athanasios Tampakis

University Hospital of Basel

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Afroditi Nonni

National and Kapodistrian University of Athens

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Nikolaos Garmpis

National and Kapodistrian University of Athens

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Anna Angelousi

National and Kapodistrian University of Athens

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