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"Karkos, Petros"
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Clinical Insights into Hearing Loss
by
Karkos, Petros D.
,
Psillas, George
in
Auditory processing disorder
,
Cochlear implants
,
Congenital diseases
2025
We are pleased to present a Special Issue addressing new insights into the causes, symptoms, diagnosis, and treatment of hearing loss [...]
Journal Article
Tubomanometry and Symptom Outcomes in Eustachian Tube Dysfunction Associated with Chronic Nasal Disease
by
Karkos, Petros
,
Constantinidis, Jannis
,
Psillas, George
in
chronic nasal disease
,
chronic rhinitis
,
chronic rhinosinusitis with nasal polyps
2026
Background: Eustachian Tube Dysfunction (ETD) presents significant diagnostic challenges, particularly in patients with chronic nasal disease, which often mimic or complicate ETD symptoms. Tubomanometry (TMM) is emerging as an objective tool for diagnosing ETD, but its application in patients with concurrent nasal pathologies remains underexplored. Methods: One hundred patients with concurrent ETD and chronic nasal disease were recruited. They were categorized into three groups: chronic rhinitis (35 patients, group A), nasal septal deviation (31 patients, group B) and chronic rhinosinusitis with polyps (34 patients, group C). Treatments included nasal irrigation, septoplasty, and nasal polypectomy with functional endoscopic sinus surgery, respectively. The TMM parameters (R, C2 and C2–C1 scores) were assessed before and after interventions. The patient reported outcome measures (ETDQ-7 and NOSE scores) were also recorded and statistically correlated with TMM measures. Results: Group A showed improvements in R, C2 and C2–C1 scores and mild post-treatment reductions in ETDQ-7 and NOSE scores. Similar improvements were observed in Group B, with significant symptom reduction post-septoplasty, particularly on the side of the nasal septal deviation. Group C demonstrated the greatest improvement, with significant improvements in TMM values and substantial reductions in both ETDQ-7 and NOSE scores. The statistical results revealed correlations between the treatment of nasal pathologies and ETDQ-7 and NOSE scores. Conclusions: All TMM parameters improved in each group following the nasal intervention. This study highlights the utility of TMM in evaluating ETD in the context of chronic nasal disease and suggests that treating underlying nasal conditions can significantly alleviate ETD symptoms.
Journal Article
Risk Factors for Recurrence of Benign Paroxysmal Positional Vertigo. A Clinical Review
2021
Benign paroxysmal positional vertigo (BPPV) is one of the most common peripheral vestibular dysfunctions encountered in clinical practice. Although the treatment of BPPV is relatively successful, many patients develop recurrence after treatment. Our purpose is to evaluate the mean recurrence rate and risk factors of BPPV after treatment. A review of the literature on the risk factors of BPPV recurrence was performed. A thorough search was conducted using electronic databases, namely Pubmed, CINAHL, Academic Search Complete and Scopus for studies published from 2000 to 2020. Thirty studies were included in this review with 13,358 participants. The recurrence rate of BPPV ranged from 13.7% to 48% for studies with follow-up <1 year, and from 13.3% to 65% for studies with follow-up ≥2 years. Pathophysiologic mechanisms and implication of each of the following risk factors in the recurrence of BPPV were described: advanced age, female gender, Meniere’s disease, trauma, osteopenia or osteoporosis, vitamin D deficiency, diabetes mellitus, hypertension, hyperlipidemia, cardiovascular disease, migraine, bilateral/multicanal BPPV, cervical osteoarthrosis and sleep disorders. Patients with hyperlipidemia and hypertension had the highest recurrence rates of BPPV, 67.80% and 55.89%, respectively, indicating that vascular comorbidities increase the risk of BPPV recurrence. In addition, more than half of patients (53.48%) with diabetes mellitus and BPPV experienced recurrence of BPPV. Knowledge and awareness of risk factors for recurrence of BPPV are essential for the assessment and long-term prognosis of patients. Identification of these relapse risk factors may enhance the ability of clinicians to accurately counsel patients regarding BPPV and associated comorbidities.
Journal Article
Cochlear Implantation After Temporal Bone Fracture: A Systematic Review of Preoperative Predictors and Timing
by
Tsitsopoulos, Parmenion P.
,
Karkos, Petros D.
,
Antoniades, Elias
in
Audiometry
,
Auditory discrimination
,
Auditory nerve
2026
Background/Objectives: Cochlear implants (CIs) constitute a viable method for auditory rehabilitation in patients with profound sensorineural hearing loss after temporal bone fractures (TBFs). These patients comprise a challenging population due to the anatomical deformity and neural injury. Methods: By performing this systematic review, we attempted to evaluate the viability of CIs in the context of TBF. The literature search, across Pubmed/MEDLINE, Scopus and Google Scholar, was performed under the PRISMA guidelines. The selected time period was from December 1995 to September 2025. The final analysis included 11 manuscripts. The majority of the studies were retrospective case series with a moderate risk of bias. Results: The primary outcome was postoperative auditory function, evaluated with speech perception tasks and aided sound-field pure-tone audiometry. The secondary outcomes were the report of radiological and electrophysiologic prognosticators of implants’ viability, timing of surgery, procedural feasibility and complications. Across the studies, CIs conferred meaningful auditory benefit when the cochlear nerve was intact. High-Resolution Computed Tomography (CT) was utilized for TBF classification and cochlear patency, whereas Magnetic Resonance Imaging (MRI) and a promontory test were crucial for the assessment of neural integrity. Prompt placement, optimally within 12 months after trauma, was related to improved outcomes by limiting cochlear fibrosis and ossification. Despite patients’ impedance fluctuation, restricted speech perception in noise and frequent abnormal facial nerve excitation, the overall audiologic and speech discrimination results are comparable to non-trauma recipients. Conclusions: A CI appears to be the choice of treatment over auditory brainstem implants, as long as the cochlear nerve remains intact. Rapid implantation in well-selected patients coupled with ordinal mapping and follow-up can restore dysfunctional hearing and improve patients’ quality of life.
Journal Article
The Impact of Cardiovascular Risk Factors on the Incidence, Severity, and Prognosis of Sudden Sensorineural Hearing Loss (SSHL): A Systematic Review
by
Papadopoulou, Anna-Maria
,
Chaidas, Konstantinos
,
Karkos, Petros
in
Apolipoproteins
,
Atherosclerosis
,
Body mass index
2024
Sudden sensorineural hearing loss (SSHL) is believed to be mainly idiopathic since the cause is not usually identified. Several recent studies have examined the role of cardiovascular risk factors in this disease. The aim of this systematic literature review is to investigate the possible association between acquired and inherited cardiovascular risk factors and the incidence, severity, and prognosis of SSHL. A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A search of the PubMed database for the period between February 2010 and January 2023 was performed in order to retrieve eligible articles. The analytic cohort included 24 studies. Overall, this systematic review includes a total of 61,060 patients that were encompassed in these studies. According to most studies, the prevalence of dyslipidaemia, diabetes, and ultrasound indices of atherosclerosis was significantly higher in SSHL patients compared to controls. On the other hand, obesity, hypertension, and smoking did not seem to influence the risk of SSHL. Most studies suggest the presence of a correlation between a high cardiovascular risk profile and the risk of developing SSHL. The theory of microvascular impairment in the development of SSHL is indirectly supported by the findings of this review.
Journal Article
Laryngopharyngeal Reflux: A State-of-the-Art Algorithm Management for Primary Care Physicians
by
Barillari, Maria R.
,
Muls, Vinciane
,
Saussez, Sven
in
Clinical medicine
,
Epidemiology
,
Erythema
2020
Laryngopharyngeal reflux (LPR) is a common disease in the general population with acute or chronic symptoms. LPR is often misdiagnosed in primary care because of the lack of typical gastroesophageal reflux disease (GERD) symptoms and findings on endoscopy. Depending on the physician’s specialty and experience, LPR may be over- or under-diagnosed. Management of LPR is potentially entirely feasible in primary care as long as General Practitioners (GPs) are aware of certain “red flags” that will prompt referral to a Gastroenterologist or an Otolaryngologist. The use of patient-reported outcome questionnaires and the consideration of some easy ways to diagnose LPR without special instrumentation oropharyngeal findings may help the GP to diagnose and often manage LPR. In this review, we provide a practical algorithm for LPR management for GPs and other specialists that cannot perform fiberoptic examination. In this algorithm, physicians have to exclude some confounding conditions such as allergy or other causes of pharyngolaryngitis and “red flags”. They may prescribe an empirical treatment based on diet and behavioral changes with or without medication, depending on the symptom severity. Proton pump inhibitors and alginates remain a popular choice in order to protect the upper aerodigestive tract mucosa from acid, weakly acid and alkaline pharyngeal reflux events.
Journal Article
Laryngopharyngeal Reflux: The Last Decade
2022
Laryngopharyngeal reflux (LPR) and its consequences for the upper aerodigestive tract have been an issue of debate and controversy for more than three decades [...].Laryngopharyngeal reflux (LPR) and its consequences for the upper aerodigestive tract have been an issue of debate and controversy for more than three decades [...].
Journal Article
Atypical Clinical Presentation of Laryngopharyngeal Reflux: A 5-Year Case Series
by
Bobin, Francois
,
Lechien, Jerome R.
,
Calvo-Henriquez, Christian
in
Acids
,
Catheters
,
Clinical medicine
2021
Background: Laryngopharyngeal reflux (LPR) is a common disease in otolaryngology characterized by an inflammatory reaction of the mucosa of the upper aerodigestive tract caused by digestive refluxate enzymes. LPR has been identified as the etiological or favoring factor of laryngeal, oral, sinonasal, or otological diseases. In this case series, we reported the atypical clinical presentation of LPR in patients presenting in our clinic with reflux. Methods: A retrospective medical chart review of 351 patients with LPR treated in the European Reflux Clinic in Brussels, Poitiers and Paris was performed. In order to be included, patients had to report an atypical clinical presentation of LPR, consisting of symptoms or findings that are not described in the reflux symptom score and reflux sign assessment. The LPR diagnosis was confirmed with a 24 h hypopharyngeal-esophageal impedance pH study, and patients were treated with a combination of diet, proton pump inhibitors, and alginates. The atypical symptoms or findings had to be resolved from pre- to posttreatment. Results: From 2017 to 2021, 21 patients with atypical LPR were treated in our center. The clinical presentation consisted of recurrent aphthosis or burning mouth (N = 9), recurrent burps and abdominal disorders (N = 2), posterior nasal obstruction (N = 2), recurrent acute suppurative otitis media (N = 2), severe vocal fold dysplasia (N = 2), and recurrent acute rhinopharyngitis (N = 1), tearing (N = 1), aspirations (N = 1), or tracheobronchitis (N = 1). Abnormal upper aerodigestive tract reflux events were identified in all of these patients. Atypical clinical findings resolved and did not recur after an adequate antireflux treatment. Conclusion: LPR may present with various clinical presentations, including mouth, eye, tracheobronchial, nasal, or laryngeal findings, which may all regress with adequate treatment. Future studies are needed to better specify the relationship between LPR and these atypical findings through analyses identifying gastroduodenal enzymes in the inflamed tissue.
Journal Article
CD4+ and CD8+ T cells infiltration of the polyp tissue in a series of Greek patients with chronic rhinosinusitis with nasal polyps
by
Vliagoftis, Harissios
,
Karkos, Petros
,
Constantinidis, Ioannis
in
Endoscopy
,
Lymphocytes
,
Otolaryngology
2021
Chronic rhinosinusitis (CRS) presents with two basic phenotypes, CRS with (CRSwNP) or without nasal polyps (CRSsNP). The present study’s objective was to evaluate the clinical characteristics in a Greek population of CRSwNP patients and their relation to the frequency of CD4+ and CD8+ T cells as well as the CD4+/CD8+ ratio as prognostic biomarkers. Thirty-three adult CRSwNP patients were recruited at the ENT Department of “G. Papanikolaou” General Hospital of Thessaloniki. Tissue samples from nasal polyps were collected during functional endoscopic sinus surgery. Hadley’s nasal endoscopy scores, preoperative Lund-Mackay CT scores, and 22-item Sinonasal Outcome Test, were recorded for each patient. The presence of CD4+ and CD8+ lymphocytes was evaluated in tissue sections by immunohistochemistry. Blood eosinophil and neutrophil counts were also included in the analysis. All data were analyzed with SPSS (version 21.0). Twenty-one males and 12 females were included in the analysis with mean age of 49.5 ± 14.5. LMS (P < 0.001, r = 0.961) and HES (P = 0.001, r = 0.54) were both positively correlated with SNOT 22. Hadley’s endoscopic score was also positively correlated with Lund-Mackay CT score (P < 0.001, r = 0.674). Absolute count and percentage of eosinophils were positively correlated with LMS (P = 0.003, r = 0.513, P = 0.002, r = 0.527 respectively) and HES (P < 0.001, r = 0.622, P = 0.004, r = 0.497 respectively). Ιn a subgroup analysis, CRSwNP patients with blood eosinophils >5%, LMS and SNOT 22 were negatively correlated to CD4+ cells (P = 0.029 r = −0.654, P = 0.043, r = −0.618, respectively). In CRSwNP patients with CD4+/CD8+ ratio <0.3, CD8+ T cells were positively correlated with the absolute count and percentage of eosinophils (P = 0.042, r = 0.684, P = 0.036, r = 0.699 respectively). In this study, we recognized the potential importance of nasal CD8+ T cells in the pathophysiology of CRSwNP patients, also characterized by eosinophil accumulation. Furthermore, the patients’ clinical characteristics were also positively correlated with the eosinophilic inflammation and the severity of the disease.
Journal Article
Impact of subspecialty training on management of laryngopharyngeal reflux: results of a worldwide survey
2021
Objective
To study the management of laryngopharyngeal reflux (LPR) among the subspecialties of practicing otolaryngology-head and neck surgeons and their trainees.
Methods
A survey was sent to over 8000 otolaryngologists (OTOHNS) over 65 countries, utilizing membership lists of participating otolaryngological societies. The outcomes were answers to questions regarding LPR knowledge and practice patterns, and included queries about its definition, prevalence, clinical presentation, diagnosis, and treatment.
Results
Of the 824 respondents, 658 practiced in one specific otolaryngologic subspecialty. The symptoms and findings thought to be the most related to LPR varied significantly between subspecialists. Extra-laryngeal findings were considered less by laryngologists while more experienced OTOHNS did not often consider digestive complaints. Compared with colleagues, otologists, rhinologists and laryngologists were less aware of the involvement of LPR in otological, rhinological and laryngological disorders, respectively. Irrespective of subspecialty, OTOHNS consider symptoms and signs and a positive response to empirical therapeutic trial to establish a LPR diagnosis. Awareness regarding the usefulness of impedance pH-studies is low in all groups. The therapeutic approach significantly varies between groups, although all were in agreement for the treatment duration. The management of non-responder patients demonstrated significant differences among laryngologists who performed additional examinations. The majority of participants (37.1%) admitted to being less than knowledgeable about LPR management.
Conclusions
LPR knowledge and management vary significantly across otolaryngology subspecialties. International guidelines on LPR management appear necessary to improve knowledge and management of LPR across all subspecialties of otolaryngology.
Journal Article