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Topic Review
Bilateral Vestibular Dysfunction
Patients with dysfunction of both vestibular systems of the inner ear experience postural instability and gait disturbances.  This condition is called Bilateral Vestibular Dysfunction (BVD). 
  • 843
  • 11 Mar 2022
Topic Review
Transoral Robotic Surgery: Applications in HNC
Minimally invasive surgery is a growing field in surgical oncology. After acquiring its first Food and Drug Administration approval in 2009 for T1–T2 malignancies of the oral cavity, oropharynx, and larynx, transoral robotic surgery (TORS) has gained popularity thanks to its wristed instruments and magnified three-dimensional view, enhancing surgical comfort in remote-access areas. Its indications are expanding in the treatment of head and neck cancer, i.e., resection of tumors of the larynx, hypopharynx, or parapharyngeal space. Head and neck cancer (HNC) incidence has increased, ranking eighth among the most common cancers worldwide in 2020 with approximately 900,000 cases yearly. Following a similar trend, head and neck surgeons in Australia and New Zealand have a TORS adoption rate of 43.6%. The main indications for TORS in all these countries are lateral oropharyngectomy, base-of-tongue mucosectomy, and surgery for obstructive sleep apnea.
  • 818
  • 30 Mar 2023
Topic Review
Diagnosis of Reflux and Place of pH Study
Laryngopharyngeal reflux (LPR) is an inflammatory condition of the upper aerodigestive tract tissues related to direct and indirect effect of gastroduodenal content reflux, which induces morphological changes in the upper aerodigestive tract. The demonstration of pharyngeal reflux events through pH study is an important step in the management of LPR because this is the most effective approach to objective the back flow of gastric content into the pharynx.
  • 806
  • 08 Jun 2022
Topic Review
CO2 Laser Transoral Laryngeal Microsurgery
CO2 laser transoral laryngeal microsurgery (TLM) is the preferred option for the majority of small–medium size glottic and supraglottic cancers and may also be used for bigger tumors, especially in older patients.
  • 802
  • 05 May 2022
Topic Review
Pathophysiology, Immunosenescence and Inflammaging of Presbyacusis
Age-related hearing loss (ARHL), or presbyacusis, is a type of sensorineural hearing loss that primarily affects the elderly. However, the age of onset, rate of decline, and severity of hearing loss vary widely. As a result of ageing, the immune system can become defective, leading to the accumulation of unresolved inflammatory processes in the body. Various stimuli can sustain inflammaging, including pathogens, cell debris, nutrients, and gut microbiota.
  • 795
  • 12 Jul 2022
Topic Review
Potential Therapies for Obstructive Sleep Apnea
Obstructive sleep apnea syndrome (OSAS) is characterized by intermittent hypoxia (IH) during sleep due to recurrent upper airway obstruction. The derived oxidative stress (OS) leads to complications that do not only concern the sleep-wake rhythm but also systemic dysfunctions.
  • 776
  • 29 Mar 2023
Topic Review
Hearing Rehabilitation in Vestibular Schwannoma
The most common complaint among patients with vestibular schwannoma (VS) is hearing loss. This significantly affects the quality of life before, during, and after treatment for patients with VS. Untreated hearing loss in VS patients may even lead to depression and feelings of social isolation. A variety of devices are available for hearing rehabilitation for patients with vestibular schwannoma. 
  • 768
  • 30 May 2023
Topic Review
Etiology of Pneumoparotid
Pneumoparotid describes retrogradely insufflated air within the Stensen’s duct and/or parotid gland. It is a rare condition with variable causative factors.  A literature search was conducted using electronic medical databases (PubMed, Scopus, Web of Science, EBSCO, Ovid, Google Scholar, SciElo, LILIACS, and others) from 1890 to 30 June 2022. One hundred and seventy patients (mean age; 28.4 years) from 126 studies were reviewed. Common symptoms included swelling (84.7%) and pain (35.9%). Characteristic findings were crepitus in the parotid region (40%) and frothy saliva from the orifice (39.4%). The common etiologies included abnormal habits such as blowing out the cheeks (23.5%), idiopathic (20%), self-induced (15.9%), playing wind instruments such as trumpets or flutes (8.8%), and diseases inducing coughing or sneezing (8.2%). The treatments included antibiotic therapy (30%), behavioral therapy to avoid continuing causative habits (25.9%), psychiatric therapy (8.2%), and surgical procedures (8.2%). Treatment should be individualized and etiology-based. However, the etiology was not identified in 20% of patients. Further detailed data from larger samples are required to clarify and improve the recognition of this entity.
  • 758
  • 05 Jan 2023
Topic Review
Intraoperative In Vivo Imaging Modalities in HNC Status
Surgical margin status is one of the strongest prognosticators in predicting patient outcomes in head and neck cancer, yet head and neck surgeons continue to face challenges in the accurate detection of these margins with the current standard of care. Advances in intraoperative imaging techniques have been developed to address these limitations in determining cancer margins in head and neck cancer (HNC). These modalities include optical coherence tomography, narrow band imaging, autofluorescence, and fluorescent-tagged probe techniques. Studies have demonstrated encouraging sensitivity and specificity in detecting HNC margins and cancer from normal tissue. 
  • 753
  • 29 Jul 2022
Topic Review
HRQOL in Oral Cancer Patients
The scope of the present entry was to highlight possible sources of bias that could be encountered when evaluating HRQOL (Health-Related Quality of Life) in patients treated for oral cancer. The second aim was to lay the foundation of a standardized protocol for cohort selection, data collection, and stratification that could enhance knowledge in the field.
  • 746
  • 22 Sep 2021
Topic Review
Vector-Borne Tularemia
Tularemia is a zoonosis caused by the highly invasive bacterium Francisella tularensis. It is transmitted to humans by direct contact with infected animals or by vectors, such as ticks, mosquitos, and flies.
  • 746
  • 26 Aug 2022
Topic Review
Surgical Techniques and The Benefits of Cochlear Implantation
As selection criteria for CI are continuously evolving and more patients are eligible for implantation, the preservation of residual hearing is becoming increasingly studied. Sustained trauma to the cochlea during the advancement of the electrode array was identified as a critical factor that can deteriorate residual hearing; therefore, in recent years, increasing attention has been directed towards surgical principles.
  • 727
  • 15 Jun 2022
Topic Review
Epithelial-to-Mesenchymal Transition
Epithelial-to-mesenchymal transition is a well-studied phenomenon in embryology and occurs during the morphogenesis of organs. It is described as epithelial-to-mesenchymal transition (EMT) type I. The molecular procedure of EMT is also reprogrammed in the healing of wounds and the pathological fibrosis of organs, known as EMT type II. EMT III is the type that is implicated in tumor metastasis. While initially focusing on the abolishment of epithelial and acquisition of mesenchymal characteristics by the tumor cells, the idea behind EMT currently incorporates all the phenotypic and molecular characteristics that enable tumor cells to migrate, survive, and proliferate in distant tissues. In other words, it is a complete model of molecular processes signaled by specific factors called inducers. This model progresses via cross-linked molecular pathways, concluding with functional and structural modifications that make the carcinoma cells metastatic. These modifications are mediated by molecules known as the effectors of EMT.
  • 724
  • 16 Sep 2022
Topic Review
Sinonasal Inverted Papilloma
Sinonasal inverted papilloma (SNIP) is a benign neoplasm of the nasal cavity and paranasal sinuses and accounts for 0.5–4% of primary nasal tumors.
  • 723
  • 22 Feb 2022
Topic Review
Fluid Biomarkers in HPV Related Oropharyngeal Carcinomas
Biomarkers are crucial in oncology, from the detection and monitoring of cancer to guiding management and predicting treatment outcomes. However, histological assessment of tissue biopsies, which is currently the gold standard for oral cancers, is technically demanding, invasive, and expensive. Liquid biopsies, through the analysis of cancer biomarkers in bodily fluids, offer promising non-invasive alternatives to patient care in oral cancers. Herein, it was to explore and discuss current markers that are detectable in various biofluids, including plasma, oropharyngeal swabs, and oral rinse. Oropharyngeal squamous cell carcinoma is classified by the World Health Organization into HPV-positive and HPV-negative types, due to their significant differences in epidemiology, clinical features, histology, and prognosis. Human papillomavirus (HPV)-positive oropharyngeal carcinomas (OPCs). patients generally show better prognosis and survival compared to their HPV-negative counterparts. Regarding HPV-positive OPCs, biomarkers are heavily centered around detection of HPV DNA and their associated oncoproteins, aiming to improve outcome and survival. Twenty clinical studies were identified from the systematic search and are categorized into genetics, epigenetics, extracellular vesicles, oncoproteins, and immune response-related markers. Clinical trials investigating biomarkers for both HPV-positive and HPV-negative cancers have approaches from various levels and different biofluids. The majority of fluid biomarker research is still in plasma, with HPV ctDNA remaining the most-studied fluid biomarker, which has already been applied clinically to other HPV-related cancers. Promising candidates have been found that could aid in detection, staging, and predicting prognosis of OPCs, in addition to well-established factors including HPV, alcohol consumption, and smoking status. These studies also emphasize the possibility of enhancing prediction results and increasing statistical significance by multi-variate analyses. Liquid biopsies, being non-invasive methods, offer promising assistance in enhancing personalized medicine in treating cancer patients. 
  • 720
  • 08 Dec 2022
Topic Review
Cochlear Implantation
Cochlear implants (CIs) are prostheses that electrically stimulate the cochlear nerve to restore not only sound perception, but speech understanding in people with profound sensorineural hearing loss. CIs use a battery-powered sound processor worn at ear level to transmit electrical signals to an electrode array that has been surgically implanted in the inner ear. The first generation of implants was approved by the FDA in 1984. These devices used a single electrode that allowed recipients to perceive the presence or absence of sound, while variably restoring some speech understanding. The FDA approved the first multi-channel implants for adults and children in 1987 and 1990, respectively. Patients who undergo implantation today do so under a growing number of indications and use devices with a tonotopic array of as many as 24 electrodes. These modern CIs promote language acquisition, literacy, and academic performance in pre-lingually deaf children, while restoring meaningful speech recognition and generating better quality-of-life outcomes for adults who are unable to use traditional amplification.
  • 713
  • 19 May 2022
Topic Review
Different Methods of Administering Medication to Olfactory Cleft
Olfactory dysfunction affects approximately 20% of the population globally, with incidence increasing over the age of 60. The pathophysiology is complex, not yet fully understood, and depends on many factors, including the underlying cause. Despite this, the present literature on olfaction is limited due to significant heterogeneity in methodological approaches. This has resulted in limited effective treatments available for olfactory dysfunction. Medications for olfactory dysfunction can be administered locally (directly to the olfactory epithelium) or systemically (orally or intravenously). There are various methods for local drug delivery to the olfactory epithelium (nasal drops, nasal sprays, atomisers, pressured meter-dosed inhalers, rinses, and exhalation delivery systems).
  • 705
  • 06 Dec 2023
Topic Review
Extracellular Vesicles in Head and Neck Surgery
EVs has spread from various medical fields to otorhinolaryngology, as well as head and neck surgery (ORL-HNS). 
  • 694
  • 06 Dec 2021
Topic Review
Epithelial–Mesenchymal Transition in Salivary Adenoid Cystic Carcinoma
Salivary adenoid cystic carcinoma (SACC) is considered the second most frequent malignant salivary gland neoplasm and exhibits a controversial and poorly understood biological behavior, characterized by slow and indolent growth. SACC typically arises from the submandibular gland and minor salivary glands, while its occurrence in the parotid gland is relatively rare. SACC has an incidence rate of approximately 4.5 cases per million individuals and constitutes 10% of all salivary gland tumors (SGTs). This type of cancer exhibits three distinct histological growth patterns, namely cribriform, tubular, and solid patterns. Among these patterns, the solid pattern represents the most aggressive form of SACC with an increased risk of metastasis, resulting in shorter disease-specific survival.
  • 675
  • 30 May 2023
Topic Review
Purines Regulate Cochlear Function in Health and Disease
Purinergic signalling is an intricate system of extracellular receptors, enzymes and transporters that regulates multiple physiological and pathophysiological processes in the mammalian inner ear. ATP release from the secretory tissues of the cochlear lateral wall (stria vascularis) triggers numerous physiological responses by activating P2 receptors in sensory, supporting and neural tissues. Herein, it is presented with evidence for the essential role of P2 receptors in cochlear development, regulation of electrochemical homeostasis, auditory neurotransmission, and adaptation to elevated sound levels. Adenosine receptors have a major role in cochlear injury responses, highlighting their clinical significance as prospective therapeutic targets. Herein, it is postulated that pharmacological manipulation of purinergic receptors, particularly adenosine receptors, represents a promising strategy for the therapeutic management of hearing loss.
  • 661
  • 08 Dec 2022
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