Publications by authors named "Raymond King-Yin Tsang"

Chronic rhinosinusitis with nasal polyps (CRSwNP) is a chronic inflammatory condition of the nasal and paranasal tissues, characterized by the presence of bilateral nasal polyps. An expert panel of specialists from the Asian-Pacific region and Russia was convened to develop regional guidance on the management of CRSwNP through a consensus approach. The present article presents the chief observations and recommendations from this panel to provide guidance for clinicians in these areas.

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Objective: To evaluate the sensitivities and specificities of Epstein-Barr virus (EBV) DNA in the detection of locally recurrent or persistent nasopharyngeal carcinoma (NPC) through nasopharyngeal (NP) brush biopsy and plasma, respectively, and whether a combination of both would be superior to the individual tests.

Study Design: A case-control study was conducted from September 2016 to June 2022.

Setting: A multicentre study at 3 tertiary referral centers in Hong Kong was conducted by the Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong.

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The effects of the COVID-19 pandemic continue to constrain health-care staff and resources worldwide, despite the availability of effective vaccines. Aerosol-generating procedures such as endoscopy, a common investigation tool for nasopharyngeal carcinoma, are recognised as a likely cause of SARS-CoV-2 spread in hospitals. Plasma Epstein-Barr virus (EBV) DNA is considered the most accurate biomarker for the routine management of nasopharyngeal carcinoma.

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Objectives: The primary objective is to evaluate the incidence of occult nodal metastasis in patients undergoing total laryngectomy with cN0 disease. Other objectives are to compare the survival between different treatments of the neck, identify possible associated risk factors, and evaluate the effectiveness of elective neck dissection in this population with regards to oncological outcomes.

Study Design: Retrospective review.

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(1) Background: SMARCB1 (INI-1)-deficient sinonasal carcinoma is a rare sinonasal malignancy; since its discovery and description in 2014, less than 200 cases have been identified. It is almost impossible to perform randomized-controlled trials on novel therapy to improve treatment outcomes in view of its rarity. We performed a systematic review of all the published case reports/series and included our patients for survival analysis.

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Article Synopsis
  • The study aims to develop machine intelligence platforms to help predict the risk of dangerous changes in oral lesions, specifically oral leukoplakia and oral lichenoid lesions, using patient data.
  • Four advanced learning algorithms and one traditional statistical method were tested on a group of 1098 patients, focusing on features from their electronic health records to improve prediction accuracy.
  • The results showed that the DeepSurv model outperformed others in stability and predictive accuracy during validation, suggesting its potential integration into clinical practice for making better decisions regarding patient care.
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To summarize and analyze the effect of extracranial/intracranial vascular bypass in the treatment of internal carotid artery burst hemorrhage after radiotherapy for nasopharyngeal carcinoma(NPC). A retrospective analysis of the data of 9 patients with nasopharyngeal carcinoma and carotid artery blowout syndrome(CBS) who underwent extracranial/intracranial vascular bypass. Collected patient demographics, treatment course and dose of radiotherapy, analyze the effect of extracranial/intracranial vascular bypass on the prognosis of patients with internal carotid artery burst hemorrhage, including perioperative stroke and death, overall survival rate, and rebleeding rate.

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Objective/hypothesis: To investigate the endovascular intervention or extracranial/intracranial (EC/IC) vascular bypass in the management of patients with head and neck cancer-related carotid blowout syndrome (CBS).

Study Design: Retrospective case series.

Methods: Retrospective analysis of clinical data of patients with head and neck cancer-related CBS treated by endovascular intervention and/or EC/IC vascular bypass, analysis of its bleeding control, neurological complications, and survival results.

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This study describes a novel approach in the reduction of SARS-CoV-2 transmission during trans-oral robotic surgery (TORS). Eight patients underwent TORS between 01 February 2020 and 07 September 2020. A sterile plastic sheet draped over sterile supports with water-tight seal around each cannula was used to create a sterile working space within which the robotic arms could freely move during operation.

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Background: Routine screening of patients with head and neck squamous cell carcinomas (HNSCCs) for synchronous malignancies using oesophagoscopy and bronchoscopy had been controversial. The aim of this study is therefore to find out the rate of synchronous malignancies in patients with primary HNSCCs, the risk factors for its occurrence and the effectiveness of oesophagoscopy and bronchoscopy from a 10-year experience in a single centre.

Methods: A retrospective review of medical records was conducted from July 2008 to June 2018 in a tertiary referral centre in Hong Kong.

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Background: Olfactory dysfunction (OD) has been reported in coronavirus disease 2019 (COVID-19). However, there are knowledge gaps about the severity, prevalence, etiology, and duration of OD in COVID-19 patients.

Methods: Olfactory function was assessed in all participants using questionnaires and the butanol threshold test (BTT).

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Article Synopsis
  • Nasopharyngeal carcinoma (NPC) linked to Epstein-Barr virus (EBV) expresses specific microRNAs (miRNAs), which show varying efficacy in diagnosing NPC.
  • A study evaluated these miRNAs using quantitative polymerase chain reaction on plasma samples from NPC patients and noncancer individuals.
  • Results indicated certain miRNAs were significantly elevated in both primary and recurrent NPC cases, with BART19-5P being the most effective for identifying NPC, even when traditional EBV DNA tests were negative.
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Radiation therapy is the standard treatment for primary nasopharyngeal carcinoma (NPC). MicroRNA regulates cancer responsiveness to radiation therapy by controlling the genes involved in radiation responses. Recent studies suggested that downregulation of microRNA-138-5p was clinically significant in NPC.

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Background: The purpose of this study was to evaluate the use of transoral nasopharyngeal brush biopsies and quantitative polymerase chain reaction (qPCR) Epstein-Barr virus (EBV) DNA detection system in surveillance of local recurrence of nasopharyngeal carcinoma (NPC).

Methods: A prospective cohort study was performed to compare the nasopharyngeal epithelial EBV DNA levels of patients with recurrent NPC and the control group of postirradiated patients with NPC disease in remission.

Results: Fourteen patients with recurrent NPC and 15 postirradiated patients in disease remission were recruited for transoral brush biopsies.

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Background: The purpose of this study was to present the feasibility of indocyanine green (ICG) mapping of sentinel lymph node in recurrent nasopharyngeal carcinoma (NPC). M1ETHODS: Peritumoral injection of 5-mg ICG solution and real-time mapping of the sentinel lymph nodes in the neck was performed during surgery. The sentinel lymph node identified was excised and sent separately for laboratory analysis.

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Objectives/hypothesis: Massive epistaxis due to ruptured pseudoaneurysm of the internal carotid artery (ICA) is an often fatal complication of radiation treatment for patients with nasopharyngeal carcinoma. We review the clinical characteristics and predictors of survival in patients suffering from this serious complication after radiotherapy.

Study Design: Retrospective case series.

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Background: The purpose of this study was to investigate the complications after maxillary swing nasopharyngectomy.

Methods: Salvage nasopharyngectomy was performed for 338 patients during 1990 to 2012. Patient and tumor characteristics, perioperative and intraoperative information, and long-term morbidities were analyzed.

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Background: Routine preoperative laryngeal examination remains controversial. We aimed to assess the utility of preoperative routine flexible laryngoscopy (FL) by looking at the incidence, clinical significance and predictors for preoperative vocal cord paresis (VCP) and incidental laryngopharyngeal conditions (LPC) in our consecutive cohort.

Methods: A total of 302 patients underwent laryngeal examination by an independent otorhinolaryngologist and were specifically asked about voice/swallowing symptoms suggestive of VCP 1 day before surgery.

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Squamous cell carcinoma (SCC) of tongue is an aggressive head and neck cancer with high propensity of regional spreading and invasion. Tongue carcinoma cells treated with curcumin, the major curcuminoid of the turmeric, demonstrated reduction in adhesion, migration, and invasion ability. High-throughput microarray analysis indicated that curcumin treatment suppressed matrix metallopeptidase 10 (MMP10) expression.

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Background: Head and neck cancer is a common second cancer in patients with a history of hematological malignancies. The purpose of this study was present the clinical characteristics and treatment outcomes of this group of patients.

Methods: A retrospective analysis was conducted of all patients who had a history of hematological malignancy and developed head and neck cancer in a 10-year period.

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Background: Recent studies have shown that salvage treatment may be effective for early tongue carcinoma with nodal failures after watchful waiting policy. We wanted to assess the efficacy of salvage neck dissection.

Methods: We conducted a retrospective review of all patients with pT1 and pT2 oral tongue cancer who underwent partial glossectomy without any neck surgery and determined the survival after salvage neck dissection in this group of patients.

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Background: Neck dissection has been shown to be effective in controlling nodal failures in nasopharyngeal carcinoma. Its efficacy in controlling the disease in patients with synchronous locoregional failure is, however, not documented.

Method: A retrospective review of all patients who underwent neck dissection for nodal failures with or without treated local failure within 6 months was conducted for this study.

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