Publications by authors named "Stephen Y Kang"

The osteocutaneous radial forearm (OCRFF) is a versatile free flap option for bony defects of the head and neck, given the thinness and pliability of the forearm cutaneous paddle, pedicle length, reliability, lack of atherosclerosis, and functional concerns common to other osseous donor sites. The OCRFF was once associated with a high risk of radial fracture, in addition to concerns about the quality and durability of bone stock for osseous reconstruction, particularly for the mandible. Following the introduction of prophylactic plating of the radius, the incidence of symptomatic radial fracture has drastically decreased.

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The osteocutaneous radial forearm free flap (OCRFFF) is a versatile flap with the ability to reconstruct complex defects. We detail the techniques necessary to harvest an OCRFFF, including an outline on making 90-degree osteotomies to maximize bone harvest. In this pictorial essay, we provide illustrations of the anatomy and surgical techniques necessary for OCRFFF harvest.

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Article Synopsis
  • * A study of 15 nonmetastatic AR+ SDC patients revealed that a significant portion had advanced disease at diagnosis, and those treated with a combination of surgery, radiation, and systemic therapy showed promising outcomes with a 5-year overall survival rate of 87%.
  • * There is considerable variation in immunoprofiles like HER-2 expression among these tumors, suggesting that personalized treatment strategies, including targeted therapies, could improve patient outcomes in the future.
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Importance: As the incidence of oropharyngeal squamous cell carcinoma (OPSCC) continues to rise in the US, an increasing number of patients are being treated with transoral robotic surgery (TORS). Readmission following surgery can potentially delay initiation of adjuvant treatment and affect survival outcomes.

Objective: To identify risk factors for 30-day postoperative readmission in patients undergoing TORS for OPSCC.

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Objectives: To determine the association between neighborhood socioeconomic status (nSES), race and incidence rate trends of oral cavity cancer (OCC).

Materials And Methods: We used data from the SEER (Surveillance, Epidemiology, and End Results) 18 Census Tract-level SES and Rurality Database (2006-2018) database of the National Cancer Institute to create cohorts of OCC patients between 2006 and 2018. Annual incidence rates were calculated and trends in rates were estimated using joinpoints regression.

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Article Synopsis
  • The study aimed to identify factors affecting volume change in non-osseous oral free flap reconstructions by analyzing postoperative imaging data over time.
  • A total of 22 patients who underwent oral tongue free flap reconstructions were included, and significant findings revealed a median volume loss of 53.2% over two years, particularly related to muscular tissue.
  • Key factors influencing flap atrophy included the amount of glossectomy performed, obesity status, and base of tongue involvement, indicating that larger flap sizes may predict higher atrophy rates.
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Importance: Historical data reveal that, compared with women, men are more likely to pursue a head and neck surgical oncology fellowship, but little is known about possible gender differences in academic productivity.

Objective: To assess demographic trends and academic productivity among American Head & Neck Society (AHNS) fellowship graduates.

Design, Setting, And Participants: This cross-sectional study used electronically published data from the AHNS on fellowship graduates in the US and Canada from July 1, 1997, to June 30, 2022.

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Objectives: The increase in incidence of thyroid cancer correlates with strict increases in body mass index (BMI) and obesity in the United States. Thyroid hormone dysregulation has been shown to precipitate circulatory volume, peripheral resistance, cardiac rhythm, and even cardiac muscle health. Theoretically, thyroid surgery could precipitate injury to the cardiopulmonary system.

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Objectives: This study investigates the impact of immediate resection of positive margins on local control of oral tongue cancer.

Materials And Methods: We analyzed 273 consecutive oral tongue cancers resected from 2013 to 2018. Additional resection was performed in cases during the initial operation based on surgeon inspection of the specimen and/or frozen margins.

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Objectives: To define the role of hypothyroidism and other risk factors for unplanned readmissions after surgery for head and neck cancer.

Study Design: Retrospective cohort study.

Methods: The Nationwide Readmission Database (NRD) was used to identify patients who underwent surgery for mucosal head and neck cancer (oral cavity, oropharynx, larynx, and hypopharynx) between 2010 and 2017.

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Objectives: Examine the relationship between hospital volume and overall mortality in a surgical cohort of head and neck squamous cell carcinoma (HNSCC) patients.

Materials & Methods: A retrospective review of the NCDB was completed for adults with previously untreated HNSCC diagnosed between 2004 and 2016. Mean annual hospital volume was calculated using the number of head and neck cancer cases treated at a given facility divided by the number of years the facility reported to the NCDB.

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Background: Oral cavity cancer (OCC) is traditionally associated with smoking, but there is an increasing prevalence of the disease among non-smokers. This review investigates possible modifiable risk factors in the development of OCC in non-smokers (OCCNS).

Methods: PubMed, EMBASE, Web of Science, and Scopus were searched for publications prior to June 2021.

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Article Synopsis
  • Fibula free flaps (FFF) have traditionally been used for mandibular reconstruction, but scapular system free flaps (SFF) are gaining traction due to their versatility and fewer complications at the donor site.
  • A study reviewed 176 patients who underwent either FFF or SFF reconstructions; operative times were similar, but SFF showed less donor site morbidity.
  • The results indicate that SFF could be a preferred choice for complex mandibular defects, thanks to its quicker harvesting process and reduced complications compared to FFF.
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The purpose was to examine the change in percent uninsured and if there is change in T-stage, N-stage and overall-stage among nonelderly patients with newly diagnosed head and neck squamous cell carcinoma after the Affordable Care Act (ACA). The National Cancer Database was used for this study. Patients were divided between pre-ACA and post-ACA implementation with stratification between areas of ACA expansion versus non-expansion.

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In the recent years, the prevalence of HPV-positive oropharyngeal squamous cell carcinoma (OPSCC) has increased significantly. Currently, nearly 80-90% of all oropharynx tumors are HPV-positive. In addition, it is now recognized that HPV-positive tumor status is associated with good prognosis and improved response to chemoradiation.

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Microvascular free flap reconstruction has remained the standard of care in reconstruction of large tissue defects following ablative head and neck oncologic surgery, especially for bony structures. Computer aided design/computer assisted manufacturing (CAD/CAM) and 3-dimensionally (3D) printed models and devices offer novel solutions for reconstruction of bony defects. Conventional free hand techniques have been enhanced using 3D printed anatomic models for reference and pre-bending of titanium reconstructive plates, which has dramatically improved intraoperative and microvascular ischemia times.

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Article Synopsis
  • - The study examines the safety and complications of two methods for placing percutaneous endoscopic gastrostomy (PEG) tubes in head and neck cancer patients, focusing on the push and pull techniques.
  • - Data from 1,575 patients indicated that 36% experienced complications, with the push technique linked to a higher risk of issues overall, while infections occurred at similar rates in both methods.
  • - Although the push technique increased the likelihood of tube-related problems, the pull technique was associated with all reported cases of stomal metastases (0.32% prevalence).
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Objectives: Radiation (ORNJ) and bisphosphonate-related (BRONJ) osteonecrosis of the jaw represent challenging entities to treat, with many patients requiring segmental resection and reconstruction with microvascular free tissue transfer (MFTT) in the setting of failed conservative therapy. Microvascular reconstruction is associated with higher post-operative complication rates when performed for advanced osteonecrosis versus oncologic defects. We hypothesize that basing antibiotic therapy on cultures obtained from the healthy bone marrow following resection during MFTT for ORNJ or BRONJ reduces rates of post-operative wound and surgical complications.

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Objective: We aim to more accurately characterize the current distribution and rates of squamous cell carcinoma (SCC) cases across various oral cavity subsites in the United States.

Study Design: Retrospective cohort.

Setting: Database study evaluating cancer incidence in the United States from 2001 to 2017.

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Human papillomavirus (HPV) related oropharyngeal squamous cell carcinoma (OPSCC) is associated with improved outcomes compared to non-virally mediated disease. Clinical trials are actively investigating de-escalation strategies to maintain excellent survival outcomes while minimizing toxicity. Delivery of effective precision medicine-based therapeutic approaches are strengthened by the identification of biomarkers to predict treatment response.

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Objectives: Carotid blowout syndrome (CBS) is a rare, life-threatening complication for patients with head and neck cancer (HNC). The primary objective was to identify factors associated with survival following CBS.

Materials And Methods: A retrospective analysis of HNC patients treated at a single tertiary care hospital with CBS between 2016 and 2020 was performed.

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Objectives: Osseous microvascular free tissue transfer (MFTT) is the gold standard for reconstruction for most segmental mandibulectomy defects. The most common osseous MFTT utilized in reconstruction is the fibular, scapular, and osteocutaneous radial forearm (OCRF) free flap. We evaluated postoperative bone union as well as clinical complications following MFTT and the impact of various patient and reconstructive characteristics, including type of osseous MFTT.

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Objectives/hypothesis: We investigate the clinicopathologic and treatment factors associated with the use of postoperative radiation therapy (PORT) and its effect on overall survival (OS) for patients with oral cavity verrucous carcinoma (VC).

Study Design: Retrospective cohort study.

Methods: A retrospective cohort study of the National Cancer Database (NCDB) from 2006 to 2015 was performed.

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Purpose: Head and neck paragangliomas are slow growing tumors where observation has become more widely accepted. Tumor growth rate as well as predictors of increased tumor growth were analyzed with the goal to identify factors to better predict disease progression and counsel patients.

Materials And Methods: Multi-institutional retrospective cohort study from 2011 to 2020.

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