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Head neck reconstruction

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https://www.readbyqxmd.com/read/28430990/three-dimensional-dose-prediction-and-validation-with-the-radiobiological-gamma-index-based-on-a-relative-seriality-model-for-head-and-neck-imrt
#1
Noriaki Hamatani, Iori Sumida, Yutaka Takahashi, Michio Oda, Yuji Seo, Fumiaki Isohashi, Keisuke Tamari, Kazuhiko Ogawa
This study proposes a quality assurance (QA) method incorporating radiobiological factors based on the QUANTEC-determined tumor control probability and the normal tissue complication probability (NTCP) of head-and-neck intensity-modulated radiation therapy (HN-IMRT). Per-beam measurements were conducted for 20 cases using a 2D detector array. Three-dimensional predicted dose distributions within targets and organs at risk were reconstructed based on the per-beam QA results derived from differences between planned and measured doses...
April 19, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28430715/computed-tomography-of-the-head-and-neck-region-for-tumor-staging-comparison-of-dual-source-dual-energy-and-low-kilovolt-single-energy-acquisitions
#2
Matthias Stefan May, Joscha Bruegel, Michael Brand, Marco Wiesmueller, Bernhard Krauss, Thomas Allmendinger, Michael Uder, Wolfgang Wuest
PURPOSE: The aim of this study was to intra-individually compare the image quality obtained by dual-source, dual-energy (DSDE) computed tomography (CT) examinations and different virtual monoenergetic reconstructions to a low single-energy (SE) scan. MATERIALS AND METHODS: Third-generation DSDE-CT was performed in 49 patients with histologically proven malignant disease of the head and neck region. Weighted average images (WAIs) and virtual monoenergetic images (VMIs) for low (40 and 60 keV) and high (120 and 190 keV) energies were reconstructed...
April 20, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28430347/hypopharyngeal-squamous-cell-carcinoma-and-laryngeal-neuroendocrine-carcinoma-colliding-in-the-aryepiglottic-fold-a-case-report
#3
Roberta Marangoni, Simone Mauramati, Giulia Bertino, Antonio Occhini, Marco Benazzo, Patrizia Morbini
PURPOSE: A collision tumor consists of 2 different histologically distinct and topographically independent tumors merging in the same mass. In the head and neck region they are rare, with only 4 cases reported in the larynx. CASE REPORT: A 60-year-old heavy smoker complained of a left submandibular lesion in October 2014. The lesion was excised and showed a poorly differentiated carcinoma, suggestive for adenocarcinoma. After a positron emission tomography-computed tomography scan showed increased metabolic activity in the left laterocervical region and right vocal cord, the patient underwent endoscopic biopsy of the lesion of the left piriform sinus, which was positive for moderately differentiated squamous cell carcinoma (SCC)...
April 14, 2017: Tumori
https://www.readbyqxmd.com/read/28423221/facial-asymmetry-in-head-and-neck-rhabdomyosarcoma-survivors
#4
Reineke A Schoot, Marinka L F Hol, Johannes H M Merks, Michael Suttie, Olga Slater, Marinde van Lennep, Saskia M J Hopman, David Dunaway, Jonathan Syme-Grant, Ludi E Smeele, Koos H Zwinderman, Huib N Caron, Peter Hammond
INTRODUCTION: Radiotherapy is essential for achieving and maintaining local control in head and neck rhabdomyosarcoma (HNRMS) patients. However, radiotherapy may cause outgrowth disturbances of facial bone and soft tissue, resulting in facial asymmetry. The aim of this study was to develop a method to visualize and measure facial asymmetry in HNRMS survivors using three-dimensional (3D) imaging techniques. METHODS: Facial deformity was evaluated in a multidisciplinary clinical assessment of 75 HNRMS survivors, treated with external beam radiotherapy (EBRT, n = 26) or Ablative surgery, MOulage brachytherapy, and REconstruction (AMORE, n = 49)...
April 19, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28421875/three-dimensional-printing-and-its-applications-in-otorhinolaryngology-head-and-neck-surgery
#5
Trevor D Crafts, Susan E Ellsperman, Todd J Wannemuehler, Travis D Bellicchi, Taha Z Shipchandler, Avinash V Mantravadi
Objective Three-dimensional (3D)-printing technology is being employed in a variety of medical and surgical specialties to improve patient care and advance resident physician training. As the costs of implementing 3D printing have declined, the use of this technology has expanded, especially within surgical specialties. This article explores the types of 3D printing available, highlights the benefits and drawbacks of each methodology, provides examples of how 3D printing has been applied within the field of otolaryngology-head and neck surgery, discusses future innovations, and explores the financial impact of these advances...
November 1, 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28419812/defining-quality-in-head-and-neck-reconstruction
#6
Peter M Vila, Jason T Rich, Shaun C Desai
Microvascular free flap reconstruction has now become the standard of care in the reconstruction of selected head and neck defects. Although uncommon, flap failure is a catastrophic event that results in significant patient morbidity, extended length of hospitalization, and increased cost. However, there is currently no gold standard for measuring the quality of a reconstructive center. Structure and process outcomes have recently been developed, but outcome measures are still lacking. Areas for future research include preoperative nutrition, preoperative flap planning, intraoperative fluid management, appropriate thromboembolism prophylaxis, consistent perioperative antibiotic regimens, skilled ancillary staff, and clear outcome measures for performance measurement...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28416356/risk-factors-for-free-flap-failure-a-retrospective-analysis-of-881-free-flaps-for-head-and-neck-defect-reconstruction
#7
W Zhou, W-B Zhang, Y Yu, Y Wang, C Mao, C-B Guo, G-Y Yu, X Peng
The aim of this study was to identify the risk factors for free flap failure after head and neck reconstructive surgery. The data of 881 consecutive patients who underwent free flap surgery at the Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, between January 2013 and November 2016, were reviewed retrospectively. All surgeries were performed by a single head and neck surgical team. Patient demographic and surgical data that may have an influence on free flap outcomes were recorded...
April 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28414545/modular-use-of-human-body-models-of-varying-levels-of-complexity-validation-of-head-kinematics
#8
William Decker, Bharath Koya, Matthew L Davis, F Scott Gayzik
Objective The significant computational resources required to execute detailed human body finite element models has motivated the development of faster running simplified models (e.g. GHBMC M50-OS). Previous studies have demonstrated the ability to modularly incorporate the validated GHBMC M50-O brain model into the simplified model (GHBMC M50-OS+B), which allows for localized analysis of the brain in a fraction of the computation time required for the detailed model. The objective of this study is to validate the head and neck kinematics of the GHBMC M50-O and M50-OS (detailed and simplified versions of the same model) against human volunteer test data in frontal and lateral loading...
April 17, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28408096/local-treatment-of-a-pharyngocutaneous-fistula-secondary-to-osteoradionecrosis
#9
Olga González-Antolín
Radionecrosis is a late, and difficult to treat,complication of radiotherapy performed on head and neck tumours, and it is difficult to treat. This process causes significant damage, not only in the skin, but also in muscular, nervous, vascular, and bone structures. This, in turn, leads to airway and digestive tract involvement, as well as a functional loss and a cosmetic defect that usually requires reconstructive surgery. Therefore, this process is associated with a significant loss in the quality of life of patients and involves a long hospital stay for treatment, as well as the necessary support measures...
April 10, 2017: Enfermería Clínica
https://www.readbyqxmd.com/read/28403069/using-a-pedicle-pectoralis-major-musculocutaneous-flap-in-head-and-neck-reconstruction-after-modified-radical-mastectomy-a-case-report
#10
Jen-Wu Huang, Nai-Yuan Wu, Yi-Ying Lin
RATIONALE: A pedicle pectoralis major musculocutaneous (PMMC) flap is one of the strategies for head and neck reconstruction. Seldom studies reported the case in which the skin area of previous modified radical mastectomy (MRM) had been used as a PMMC flap in head and neck reconstruction. PATIENT CONCERNS: An 84-year-old female who had suffered from left breast cancer and undergone a left modified radical mastectomy (MRM) more than 20 years earlier. DIAGNOSES: She had squamous cell carcinoma of the tongue and had undergone partial glossection and left modified radial neck dissection...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28400133/perioperative-serum-levels-of-procalcitonin-c-reactive-protein-and-leukocytes-in-head-and-neck-free-flaps
#11
S Koerdt, N Rommel, N H Rohleder, S Sandig, G Frohwitter, T Steiner, K D Wolff, M R Kesting
Microvascular free flaps are considered to be the gold standard in reconstructive head and neck surgery. However, reduced postoperative transplant perfusion is one of the serious postoperative complications and calls for close and reliable monitoring. Procalcitonin, C-reactive protein, and leukocytes are closely associated with local and systemic inflammatory reactions and might have prognostic capacity concerning tissue necrosis. This study aimed to evaluate perioperative serum levels of these three biomarkers to assess their potential in postoperative flap monitoring...
April 8, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28399024/immediate-reconstruction-for-plantar-melanoma-a-paradigm-shift
#12
Hunter Oliver-Allen, Merisa Piper, Carolyn Vaughn, Hani Sbitany
INTRODUCTION: Plantar melanoma tumors are traditionally treated with wide local excision based on depth of invasion, followed by delayed reconstruction once negative surgical margins are confirmed. However, delayed reconstruction requires care for an open wound, a prolonged treatment course, and the need for an additional surgery. Immediate reconstruction has been shown to be oncologically safe in head and neck melanoma, but little is described in the literature regarding immediate reconstruction in plantar melanoma...
May 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28390434/surgical-site-infections-following-oral-cavity-cancer-resection-and-reconstruction-is-a-risk-factor-for-plate-exposure
#13
Christopher M Yao, Hedyeh Ziai, Gordon Tsang, Andrea Copeland, Dale Brown, Jonathan C Irish, Ralph W Gilbert, David P Goldstein, Patrick J Gullane, John R de Almeida
BACKGROUND: Plate-related complications following head and neck cancer ablation and reconstruction remains a challenging problem often requiring further management and reconstructive surgeries. We aim to identify an association between surgical site infections (SSI) and plate exposure. METHODS: A retrospective study between 1997 and 2014 was performed to study the association between postoperative SSI and plate exposures. Eligible patients included those with a history of oral squamous cell carcinoma who underwent surgical resection, neck dissection, and free tissue reconstruction...
April 8, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28387356/pectoralis-major-myocutaneous-flap-for-head-and-neck-defects-in-the-era-of-free-flaps-harvesting-technique-and-indications
#14
Muyuan Liu, Weiwei Liu, Xihong Yang, Haipeng Guo, Hanwei Peng
The role of the pectoralis major myocutaneous flap (PMMF) in head and neck reconstruction is challenged recently due to its natural drawbacks and the popularity of free flaps. This study was designed to evaluate the indications and reliability of using a PMMF in the current free flap era based on a single center experience. The PMMF was harvested as a pedicle-skeletonized flap, with its skin paddle caudally and medially to the areola, including the third intercostal perforator, preserving the upper one third of the pectoralis major muscle...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28384846/absence-of-posterior-triangle-clinical-and-embryological-perspective
#15
Shikha Singh, Puja Chauhan, Hitendra Kumar Loh, Vandana Mehta, Rajesh Kumar Suri
Sternocleidomastoid (SCM) and Trapezius (TM) muscle present in the cervical region serves as an important landmark in forming boundaries of posterior triangle of neck. This case reports a continuous muscle sheet obscuring the left posterior triangle in the neck of a 60-year-old Indian male cadaver. An unfamiliar oval gap was observed in its posterosuperior portion. Description of such a variant in anatomical literature is rare and is scarcely reported. An attempt has been made to portray its embryological and phylogenetic basis...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384844/morphometry-of-proximal-femur-in-indian-population
#16
Minakshi Verma, Sheetal Joshi, Anita Tuli, Shashi Raheja, Priyanka Jain, Priyanka Srivastava
INTRODUCTION: Total hip arthroplasty is a commonly performed surgery now-a-day. There are regional and racial variations in the stature of the population worldwide. So there is always need of population specific data for making best fit prosthesis. AIM: The present study was done to measure the parameters of proximal femur and to analyse their correlation by using standard statistical analysis. MATERIALS AND METHODS: Ninety one dry bones (44 left and 47 right) were used...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28375895/the-relationship-between-subluxation-percentage-of-the-femoroacetabular-joint-and-acetabular-width-in-asian-women-with-developmental-dysplasia-of-the-hip
#17
Yaichiro Okuzu, Koji Goto, Tomotoshi Kawata, Kazutaka So, Yutaka Kuroda, Shuichi Matsuda
BACKGROUND: Implantation of the acetabular cup insert in the "true" location of the acetabulum is a fundamental principle of total hip arthroplasty for the treatment of secondary osteoarthritis due to developmental dysplasia of the hip (DDH). As knowledge of the morphology of the acetabulum is required for accurate placement, we investigated the relationship between acetabular width and the Crowe classification of subluxation percentage of the hip. We also analyzed factors associated with the acetabular width ratio (AWR), defined as the acetabular width of the dysplastic hip divided by that of the unaffected, contralateral hip...
April 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28371495/safe-zone-of-posterior-screw-insertion-for-talar-neck-fractures-on-3-dimensional-reconstruction-model
#18
Jian-Qun Wu, Sheng-Hui Ma, Song Liu, Cheng-He Qin, Dan Jin, Bin Yu
OBJECTIVE: To investigate the optimal posterior screw placement and the geometry of safe zones for screw insertion in the talar neck. METHODS: Computed tomography data for 15 normal feet were imported into Mimics 10.01 software for 3-dimensional reconstruction; 4.0-mm-diameter screws were simulated from the lateral tubercle of the posterior process of the talus to the talar head. The range of screw paths trajectories and screw lengths at nine locations that did not breach the cortex of the talus were evaluated...
February 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28366108/elective-neck-dissection-for-head-and-neck-cutaneous-squamous-cell-carcinoma-with-skull-base-invasion
#19
Richard B Cannon, Yusuf Dundar, Andrew Thomas, Marcus M Monroe, Luke O Buchmann, Benjamin L Witt, Aleksandra M Sowder, Jason P Hunt
Objectives Skull base invasion from cutaneous squamous cell carcinoma (cSCC) via perineural spread affects survival and the rate of regional metastasis. Our objective is to investigate the factors associated with elective neck dissection (END) in this population and the survival difference with END compared with observation for patients with a cN0 neck. Study Design Case series with chart review. Setting Academic. Subjects and Methods Patients were treated surgically for head and neck cSCC with skull base invasion via perineural spread with a cN0 neck from 2004 to 2014...
April 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28363227/morbidity-of-the-free-fibula-flap-reconstruction-in-head-and-neck-malignancies
#20
Harin Asokan, Jerry R John
No abstract text is available yet for this article.
March 31, 2017: Journal of Reconstructive Microsurgery
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