Konstantinos Zacharis

Mr. Konstantinos Zacharis

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Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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27 July 2018 in Medicina
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Journal Article
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KZKonstantinos Zacharis
Konstantinos Zacharis
CMChristina I. Messini
Christina I. Messini
George AnifandisGeorge Anifandis
George Anifandis
GKGeorge Koukoulis
George Koukoulis
MSMaria Satra
Maria Satra
ADAlexandros Daponte
Alexandros Daponte
Human papilloma virus (HPV) is one of the most prevalent viral sexually transmitted diseases. The ability of HPV to induce malignancy in the anogenital tract and stomato-pharyngeal cavity is well documented. Moreover, HPV infection may also affect reproductive health and fertility. Although, the impact of HPV on female fertility has not been thoroughly studied it has been found also to have an impact on semen parameters. Relative information can be obtained from studies investigating the relationship between HPV and pregnancy success. Furthermore, there is an ongoing debate whether HPV alters the efficacy of assisted reproductive technologies. An association between HPV and assisted reproductive technologies (ART) programs has been reported. Nevertheless, due to conflicting data and the small number of existing studies further research is required. It remains to be clarified whether HPV detection and genotyping could be included in the diagnostic procedures in couples undergoing in vitro fertilization (IVF)/intrauterine insemination (IUI) treatments. Vaccination of both genders against HPV can reduce the prevalence of HPV infection and eliminate its implications on human fertility. The aim of the present mini-review is to reiterate the association between HPV and human fertility through a systematic literature review.

1 January 2020 in Pan African Medical Journal
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Journal Article
Open access
KZKonstantinos Zacharis
Konstantinos Zacharis
SKStavros Kravvaritis
Stavros Kravvaritis
TCTheodoros Charitos
Theodoros Charitos
ECEleni Chrysafopoulou
Eleni Chrysafopoulou
AFAnastasia Fouka
Anastasia Fouka
Chorioangioma is the most common type of placental tumor. A primigravida woman was noted on routine scan at 21 weeks of gestation to have a placental mass measuring 1.8 x 2.2cm. A detailed ultrasound scan revealed a well circumscribed, hypoechoic lesion protruding into the amniotic cavity; hence a preliminary diagnosis of placental chorioangioma was made and close prenatal surveillance was scheduled. At 34 weeks of gestation, the mass was measuring 6.27 x 5.38cm. The patient experienced reduced fetal movements at 37 weeks gestation. A small-for-gestational age but normal female neonate was delivered by caesarean section. Histopathological analysis of the placenta confirmed the diagnosis. According to our case, a giant placental chorioangioma may have a favorable outcome without any medical intervention.

31 December 2025 in Cancers
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Journal Article
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AGApostolia Galani
Apostolia Galani
SSSofoklis Stavros
Sofoklis Stavros
EMEfthalia Moustakli
Efthalia Moustakli
Anastasios PotirisAnastasios Potiris
Anastasios Potiris
AZAthanasios Zikopoulos
Athanasios Zikopoulos
EDEkaterini Domali
Ekaterini Domali
Endometrial hyperplasia (EH) comprises a spectrum of abnormal proliferative changes in the endometrium, ranging from benign glandular overgrowth to lesions with substantial malignant potential. The importance of risk stratification and early identification is highlighted by the growing recognition of EH as a precursor to endometrial cancer. The main causes of EH, according to epidemiological research, include obesity, polycystic ovarian syndrome (PCOS), metabolic dysfunction, and extended exposure to unopposed estrogen. Emerging molecular markers, histological analysis, and imaging are all necessary for a proper diagnosis of EH because it might appear with vague clinical symptoms such as irregular uterine bleeding. Surgical intervention or progestin therapy are two possible management techniques for EH, depending on the lesion’s intricacy and the patient’s medical history, including fertility issues. Personalized therapy techniques and recent developments in molecular profiling have the potential to enhance patient outcomes by matching treatment to tumor biology and individual risk profiles. This review highlights the translational potential of molecular insights while synthesizing the most recent data on the epidemiology, risk factors, diagnostic techniques, and therapy of EH. A deeper comprehension of these elements is necessary to maximize treatment results and stop the development of endometrial cancer.

21 August 2021 in Case Reports in Obstetrics and Gynecology
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Journal Article
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AEAikaterini-Eirini Evangelopoulou
Aikaterini-Eirini Evangelopoulou
KZKonstantinos Zacharis
Konstantinos Zacharis
KBKonstantina Balafa
Konstantina Balafa
ADAlexandros Daponte
Alexandros Daponte
OKOurania Koukoura
Ourania Koukoura
Cervical squamous cell carcinoma of the uterus associated with pelvic organ prolapse is very rare and usually occurs in elderly women. We hereby present an 81-year-old postmenopausal woman presented to the outpatient department with an ulcerated irreducible uterine procidentia. The prolapse was reduced under general anesthesia and biopsy of the lesions confirmed a cervical squamous cell carcinoma. Pretreatment clinical staging revealed a 16 cm enlarged uterus and mild to moderate unilateral hydroureteronephrosis, secondary to periureteric infiltration, clinical stage IIIB. The patient was disqualified from surgery, and palliative chemotherapy plus radiotherapy was recommended. Patient’s general condition was rapidly deteriorated, and three months after the diagnosis, the patient passed away. Therapeutic management of cervical cancer associated with uterovaginal prolapse is not well established. Hence, this article presents the clinical concerns that arise in such rare and neglected cases.

1 January 2023 in Pan African Medical Journal
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Journal Article
Open access
VTVasiliki-Kalouda Tsapadikou
Vasiliki-Kalouda Tsapadikou
KZKonstantinos Zacharis
Konstantinos Zacharis
ABAsimina-Paraskevi Barbarousi
Asimina-Paraskevi Barbarousi
SCSpyridon Chondros
Spyridon Chondros
SKStavros Kravvaritis
Stavros Kravvaritis
TCTheodoros Charitos
Theodoros Charitos
Intestinal obstruction due to adnexal torsion is a rare complication that can be occurred during torsion of an ovarian cyst. A premenopausal woman presented to the emergency department with complaints of abdominal distension, abdominal pain and obstipation for 2 days. An abdominal radiograph showed signs of large bowel partial obstruction. Hence admission in the surgical department was ordered. Due to deterioration of the patient, a gynaecological evaluation took place. Ultrasonography demonstrated a large ovarian cyst, which was also confirmed by an abdominal computed tomography scan and thus immediate laparotomy was decided. Abdominal hysterectomy with bilateral salpingo-oophorectomy was performed due to torsion of a giant ovarian cyst, which caused the intestinal obstruction by compression. Post-operative course of the patient was uneventful. Ovarian torsion should not be eliminated from differential diagnosis when it comes to female patients with clinical presentation relevant to small and/or large bowel obstruction.

Verified
Journal Article
Open access
PDF file
AZAthanasios Zikopoulos
Athanasios Zikopoulos
EMEfthalia Moustakli
Efthalia Moustakli
PKPeriklis Katopodis
Periklis Katopodis
VPVasilis Paraschos
Vasilis Paraschos
Anastasios PotirisAnastasios Potiris
Anastasios Potiris
SSSofoklis Stavros
Sofoklis Stavros
Adipocytes produce the hormone leptin, a hormone that links energy availability to reproductive function by permitting activation of the hypothalamic–pituitary–gonadal (HPG) axis. Loss-of-function mutations in the long leptin receptor isoform (LEPRb) disrupt intracellular signaling pathways, including the Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3), phosphoinositide 3-kinase (PI3K), and mitogen-activated protein kinase (MAPK) pathways, resulting in central leptin resistance and impaired neuroendocrine control of reproduction. Evidence from human monogenic obesity syndromes, animal models, and neuroendocrine studies indicates that LEPRb mutations disrupt hypothalamic circuitry upstream of gonadotropin-releasing hormone (GnRH) neurons, impairing GnRH pulsatility and leading to hypogonadotropic hypogonadism (HH) and infertility. This review synthesizes molecular, translational, and clinical data highlighting the central role of kisspeptin-mediated signaling in leptin-dependent reproductive regulation. Current therapeutic limitations are discussed alongside emerging approaches, including kisspeptin-based therapies and receptor-targeted strategies. Elucidating how LEPRb dysfunction disrupts metabolic–reproductive integration may provide insights into both rare monogenic conditions and common obesity-associated reproductive dysfunction.