ABSTRACT
Technetium-99m sestamibi single-photon emission computed tomography/computed tomography (99mTc-sestamibi SPECT/CT) is a mainstay of the pre-operative localization of parathyroid lesions. We report here the case of a 30 year-old woman with a fortuitously discovered 2 cm cervical mass for which a parathyroid origin was originally suspected due to its retro-thyroidal localization and a personal history of nephrolithiasis. Normal serum calcium and parathyroid hormone (PTH) levels excluded primary hyperparathyroidism, raising suspicion of a non-functional parathyroid adenoma, and SPECT/CT imaging showed that the mass was 99mTc-sestamibi-avid. Fine-needle aspiration (FNA) was performed; cytology was non-diagnostic but the needle washout was negative for thyroglobulin, calcitonin and PTH, arguing against a thyroidal or parathyroidal origin of the mass. Core needle biopsy revealed a schwannoma, ostensibly originating from the recurrent laryngeal nerve; upon surgical resection, it was finally found to arise from the esophageal submucosa. This case illustrates the fact that endocrinologists, radiologists, nuclear medicine, head and neck, and other specialists investigating patients with cervical masses should be aware that schwannomas need to be considered in the differential diagnosis of focal 99mTc-sestamibi uptake in the neck region.
Subject(s)
Adenoma , Neurilemmoma , Parathyroid Neoplasms , Technetium Tc 99m Sestamibi , Humans , Female , Parathyroid Neoplasms/diagnostic imaging , Parathyroid Neoplasms/pathology , Parathyroid Neoplasms/surgery , Parathyroid Neoplasms/diagnosis , Adult , Neurilemmoma/diagnostic imaging , Neurilemmoma/pathology , Neurilemmoma/diagnosis , Diagnosis, Differential , Adenoma/diagnostic imaging , Adenoma/diagnosis , Adenoma/pathology , Adenoma/metabolism , Esophageal Neoplasms/diagnostic imaging , Esophageal Neoplasms/diagnosis , Esophageal Neoplasms/pathology , Esophageal Neoplasms/surgery , Single Photon Emission Computed Tomography Computed Tomography , RadiopharmaceuticalsABSTRACT
Tissue wounds are a significant challenge for the healthcare system, affecting millions globally. Current methods like suturing and stapling have limitations as they inadequately cover the wound, fail to prevent fluid leakage, and increase the risk of infection. Effective solutions for diverse wound conditions are still lacking. Adhesive hydrogels, on the other hand, can be a potential alternative for wound care. They offer benefits such as firm sealing without leakage, easy and rapid application, and the provision of mechanical support and flexibility. However, the in vivo durability of hydrogels is often compromised by excessive swelling and unforeseen degradation, which limits their widespread use. In this study, we addressed the durability issues of the adhesive hydrogels by incorporating acrylamide polyethylene glycol N-hydroxysuccinimide (PEG-NHS) moieties (max. 2 wt %) into hydrogels based on hydroxy ethyl acrylamide (HEAam). The results showed that the addition of PEG-NHS significantly enhanced the adhesion performance, achieving up to 2-fold improvement on various soft tissues including skin, trachea, heart, lung, liver, and kidney. We further observed that the addition of PEG-NHS into the adhesive hydrogel network improved their intrinsic mechanical properties. The tensile modulus of these hydrogels increased up to 5-fold, while the swelling ratio decreased up to 2-fold in various media. These hydrogels also exhibited improved durability under the enzymatic and oxidative biodegradation induced conditions without causing any toxicity to the cells. To evaluate its potential for clinical applications, we used PEG-NHS based hydrogels to address tracheomalacia, a condition characterized by inadequate mechanical support of the airway due to weak/malacic cartilage rings. Ex vivo study confirmed that the addition of PEG-NHS to the hydrogel network prevented approximately 90% of airway collapse compared to the case without PEG-NHS. Overall, this study offers a promising approach to enhance the durability of adhesive hydrogels by the addition of PEG-NHS, thereby improving their overall performances for various biomedical applications.
Subject(s)
Hydrogels , Polyethylene Glycols , Polyethylene Glycols/pharmacology , Hydrogels/pharmacology , Adhesives , State Medicine , Biocompatible Materials , AcrylamidesABSTRACT
BACKGROUND: Toxic epidermal necrolysis is a rare and life-threatening mucocutaneous disease. Although mucosal ear, nose, and throat (ENT) involvement is common, little is known about the characteristics, treatment modalities, and outcomes of these lesions. The aim of this study was to evaluate ENT mucosal lesions in severe toxic epidermal necrolysis patients and analyze their characteristics, treatment modalities, and outcomes, as well as proposing a management algorithm to prevent long-term debilitating sequalae of these lesions. METHODS: This is a retrospective review of toxic epidermal necrolysis cases treated at the tertiary burns unit of the Lausanne University Hospital CHUV, Switzerland, between 2006 and 2019. RESULTS: Out of 19 patients with severe toxic epidermal necrolysis, 17 (89%) underwent a complete ENT examination at admission and 14 (82%) had ENT mucosal involvement. Five (26.3%) patients died during the stay in the intensive care unit. Of the 16 patients who received maximal care, 13 (81%) required orotracheal intubation for a median time of 16 (IQR: 14) days. Out of the 14 patients who survived, four (29%) had long-term ENT complications consisting of synechiaes necessitating subsequent endoscopic procedures. Those four patients all required mechanical ventilation with an orotracheal tube and suffered from hypopharyngeal synechiaes as well as oral and endonasal synechiaes in individual cases. CONCLUSION: This study suggests a high prevalence of ENT synechiaes in patients with severe toxic epidermal necrolysis and requiring orotracheal intubation. Periodic ENT examination could prevent mature synechiae formation in these patients. We propose an algorithm to prevent long-term sequalae in ENT mucosal involvement.
ABSTRACT
Tracheomalacia (TM) is a condition characterized by a weak tracheal cartilage and/or muscle, resulting in excessive collapse of the airway in the newborns. Current treatments including tracheal reconstruction, tracheoplasty, endo- and extra-luminal stents have limitations. To address these limitations, this work proposes a new strategy by wrapping an adhesive hydrogel patch around a malacic trachea. Through a numerical model, first it was demonstrated that a hydrogel patch with sufficient mechanical and adhesion strength can preserve the trachea's physiological shape. Accordingly, a new hydrogel providing robust adhesion on wet tracheal surfaces was synthesized employing the hydroxyethyl acrylamide (HEAam) and polyethylene glycol methacrylate (PEGDMA) as main polymer network and crosslinker, respectively. Ex vivo experiments revealed that the adhesive hydrogel patches can restrain the collapsing of malacic trachea under negative pressure. This study may open the possibility of using an adhesive hydrogel as a new approach in the difficult clinical situation of tracheomalacia.
ABSTRACT
PURPOSE: To assess the role of preoperative CT-based skeletal muscle mass depletion on postoperative clinical outcomes and survival in patients who underwent total laryngectomy for cancer. METHODS: Patients operated on between January 2011 and March 2020 were retrospectively included. Skeletal muscle area and intra- and inter-muscular fat accumulation were measured at the third lumbar vertebral level on preoperative CT scans. Skeletal muscle mass depletion was defined based on pre-established cut-off values. Their association with postoperative morbidity, length of stay (LOS), costs, and survival was assessed. RESULTS: A total of 84 patients were included, of which 37 (44%) had preoperative skeletal muscle mass depletion. The rate of postoperative fistula (23% vs. 35%, p = 0.348), cutaneous cervical dehiscence (17% vs. 11%, p = 0.629), superficial incisional surgical site infections (SSI) (12% vs. 10%, p = 1.000), and unplanned reoperation (38% vs. 37%, p = 1.000) were comparable between the two patient groups. No difference in median LOS was observed (41 vs. 33 days, p = 0.295), nor in treatment costs (119,976 vs. 109,402 CHF, p = 0.585). The median overall survival was comparable between the two groups (3.43 vs. 4.95 years, p = 0.09). CONCLUSIONS: Skeletal muscle mass depletion alone had no significant impact on postoperative clinical outcomes or survival.
ABSTRACT
OBJECTIVES: To review treatment and outcomes in patients with congenital cricoid cartilage malformation. METHODS: Retrospective analysis of patients with diagnosis of congenital cricoid malformation (CCM) treated in a single tertiary pediatric referral center between 1985 and 2022. Patients were grouped according to the morphology of the cricoid cartilage that was diagnosed during endoscopy. We reviewed the treatment strategy(s), decannulation rate, complications, and functional outcomes. RESULTS: Twenty-nine patients were grouped into four morphological subtypes of cricoid cartilage: 10 patients had a hypoplastic cricoid, eight had an elliptic shape, five had severe anterior thickening, and six an accentuated V-shape posterior cricoid plate. Twenty-four patients underwent surgery, and five were closely followed up without surgical treatment. Eight patients had a tracheostomy prior to surgery, and the majority had a hypoplastic cricoid. Most patients (20 out of 24) required additional procedures postoperatively to achieve an age-appropriate airway. Thirteen patients needed endoscopic dilatation(s) and granulation tissue removal; four needed more aggressive treatment, and three patients required revision open surgery. Decannulation was achieved after a median of 4.5 months in all previously tracheostomized patients. Endoscopy at the last follow-up showed an age-appropriate airway in 27 patients; 20 patients had normal oral feeding, and 11 patients had a normal voice. CONCLUSION: Endoscopy is important to diagnose CCM and most of the time patients would need only watchful waiting. In this report, surgery was required for patients who continued to remain symptomatic and had a compromised airway. The type of surgery depends on the type of cricoid malformation and the grade of stenosis. LEVEL OF EVIDENCE: 4 Laryngoscope, 133:3185-3191, 2023.
Subject(s)
Airway Obstruction , Laryngostenosis , Child , Humans , Airway Obstruction/etiology , Airway Obstruction/surgery , Cricoid Cartilage/surgery , Laryngostenosis/etiology , Laryngostenosis/surgery , Laryngostenosis/diagnosis , Retrospective Studies , Treatment OutcomeABSTRACT
PURPOSE: During endoscopic sinus surgery (ESS), difficult-to-reach pathologies need an extended endoscopic approach or an external approach. We started to use a flexible interventional endoscope (FIE) to evaluate the necessity of those approaches. The study's objective is to describe our experience and define patients who could benefit from this technique. METHODS: We reviewed every patient who benefited from FIE associated with ESS at our tertiary University Hospital between January 2021 and February 2022. RESULTS: During this period, we did 107 ESS, and 14 patients benefited from the FIE, representing 13% of our ESS. The median duration of the flexible endoscopy time was 14 min (4-38 min). We identified three groups of patients who can benefit from the FIE. The first one is for patients with a fungal infection, to control and to clean lateral recesses in a noninvasive manner. The second one is for patients with a pathology of the lateral frontal sinus, to remove the frontoethmoidal cells or mucocele with the biopsy forceps through the working channel. The third group is for patients with inverted papillomas, to precisely identify the insertion and to decide on the most appropriate surgical approach. CONCLUSIONS: In selected cases, using flexible endoscopy during ESS helps decide the optimal surgical approach and sometimes treat the pathology through a limited approach. Prospective studies for each group of patients are needed to confirm the benefit of this new combined procedure.
Subject(s)
Frontal Sinus , Mucocele , Papilloma, Inverted , Humans , Endoscopy/methods , Frontal Sinus/diagnostic imaging , Frontal Sinus/surgery , Frontal Sinus/pathology , Mucocele/pathology , Mucocele/surgery , Papilloma, Inverted/diagnostic imaging , Papilloma, Inverted/surgery , Papilloma, Inverted/pathology , Prospective Studies , Retrospective StudiesABSTRACT
Vascular anomalies are rare lesions of diverse nature that may affect the head and neck region. Any mass in or around the upper airway has the potential to obstruct or compromise it. The absolute priority, before etiologic treatment, is the evaluation of the risk for the airway and its management. Prenatal diagnosis of an upper airway obstruction requires a planned delivery in a center having a specialized team experienced in managing a compromised feto-neonatal airway, and who could perform an ex-utero intrapartum treatment to secure the airway. Even after birth, the airway remains central in the patient's overall management. Signs and symptoms of airway compromise must be evaluated keeping in mind the specific requirements of infants and small children and being aware that rapid worsening may occur. The treatment is then tailored to the patient and his lesion with the goal of improving symptoms while avoiding treatment-related complications. Maintaining reasonable expectations by the patient and families are part of a successful management. Cure is achievable for small and localized lesions, but symptom relief and mitigation of functional, esthetic and psychological impairments is the goal for large and complex lesions. If a tracheotomy was required, decannulation is one of the primary management goals.
Subject(s)
Airway Obstruction , Vascular Malformations , Child , Female , Humans , Infant , Infant, Newborn , Pregnancy , Airway Obstruction/etiology , Airway Obstruction/surgery , Esthetics, Dental , Laryngostenosis , Prenatal Diagnosis/adverse effects , TracheotomyABSTRACT
Endoscopic management of benign or malignant airway obstructions sometimes requires stenting after dilatation or debulking of the tumor. Straight stents are highly prone to migration in the trachea and the main bronchus, with potential catastrophic consequences. Multiple fixation strategies have been described to secure subglottic stents, each having certain limitations. This report describes a novel, "inside-to-outside" stent fixation in the upper airway using the Lichtenberger needle carrier in 2 consecutive patients.
Subject(s)
Airway Obstruction , Tracheal Stenosis , Airway Obstruction/surgery , Bronchi , Humans , Stents , Trachea/surgery , Tracheal Stenosis/surgeryABSTRACT
Background: Lateral pathologies of the frontal sinus are difficult to visualize and treat with classical endoscopic sinus surgery (ESS) using rigid endoscopes and instruments. Hence, they often require extended endoscopic or external approaches. Methods and Results: We describe the advantages of using interventional flexible bronchoscopy in frontal ESS without extended approaches in 2 illustrated cases: (1) A fungus ball in the frontal sinus with a frontoethmoidal cell. The flexible bronchoscope allowed treatment of all recesses of the frontal sinuses and the opening of a frontoethmoidal cell through a Draf IIa. (2) A revision surgery with a frontoethmoidal cell obstructing drainage pathway was successfully treated with this same technique. Patients did not experience complications or recurrent symptomatology after, respectively, 4 and 15 months of follow-up. Conclusion: Flexible bronchoscopy allows a good visualization and treatment of lateral frontal sinus pathologies through limited endoscopic approaches. Through-the-scope instruments permit the resection of frontoethmoidal cells.
ABSTRACT
Anaplastic thyroid cancer (ATC) is among the most aggressive cancers with a median overall survival of 4 months and a disease-specific mortality of close to 100%. As soon as the diagnosis is suspected or established, urgent referral to an experienced multidisciplinary center is imperative. Chemotherapy has limited efficacy. Molecular analyses, together with the availability of novel targeted therapies and immunotherapies, now permit to improve outcomes. In particular, targeted therapy with dabrafenib and trametinib is indicated as first-line therapy for BRAF V600E-mutated ATC.
Le cancer anaplasique de la thyroïde (CAT) compte parmi les cancers les plus agressifs avec une survie médiane de 4 mois et une mortalité spécifique à la maladie proche de 100 %. Dès que le diagnostic est suspecté ou établi, une orientation urgente vers un centre multidisciplinaire expérimenté est essentielle. La chimiothérapie a une efficacité limitée. Les analyses moléculaires, ainsi que la disponibilité de nouvelles thérapies ciblées et d'immunothérapies, permettent désormais d'améliorer les résultats. En particulier, le CAT avec mutation BRAF V600E bénéficie d'une combinaison de thérapies ciblées par dabrafénib et tramétinib en traitement de première ligne.
Subject(s)
Thyroid Carcinoma, Anaplastic , Thyroid Neoplasms , Humans , Mutation , Proto-Oncogene Proteins B-raf/genetics , Thyroid Carcinoma, Anaplastic/diagnosis , Thyroid Carcinoma, Anaplastic/drug therapy , Thyroid Carcinoma, Anaplastic/genetics , Thyroid Neoplasms/diagnosis , Thyroid Neoplasms/drug therapy , Thyroid Neoplasms/geneticsABSTRACT
The surgical management of unilateral and bilateral vocal cord paralysis depends on the severity of the condition, the potential for spontaneous recovery, the patient's age and vocal expectations. Standardized re-innervation surgeries, unilateral non-selective and bilateral selective, are viable alternatives to static procedures currently under evaluation in prospective studies. Neurorraphy of the ansa cervicalis loop to the recurrent laryngeal nerve allows lasting vocal recovery and potentially superior results to medialization and thyroplasty, by maintaining the visco-elastic properties of the vocal cord and preventing its atrophy. Selective bilateral reinnervation shows potential for recovery of inspiratory abduction with improved respiratory function without vocal deterioration.
La prise en charge chirurgicale des paralysies cordales uni et bilatérales dépend de la sévérité de l'atteinte, du potentiel de récupération spontanée, de l'âge du patient et de ses attentes. De nouvelles stratégies standardisées de réinnervations, unilatérales non sélectives et bilatérales sélectives, sont désormais appliquées en clinique et en cours d'études prospectives. La neurorraphie de l'anse cervicale au nerf laryngé récurrent permet un rétablissement vocal durable et potentiellement supérieur aux techniques statiques de médialisation et thyroplastie, par maintien des propriétés viscoélastiques de la corde et prévention de sa fibrose. La réinnervation bilatérale sélective montre un potentiel de récupération de l'abduction inspiratoire avec une amélioration des fonctions respiratoires sans détérioration vocale.
Subject(s)
Larynx/surgery , Recurrent Laryngeal Nerve/surgery , Vocal Cord Paralysis/surgery , Vocal Cords/surgery , Humans , Prospective StudiesABSTRACT
BACKGROUND: Angiogenesis plays an important role in head and neck squamous cell carcinoma (HNSCC) progression. This pilot study was designed to compare the distribution of 68Ga-NODAGA-RGD PET/CT for imaging αvß3 integrins involved in tumor angiogenesis to 18F-FDG PET/CT in patients with HNSCC. MATERIAL AND METHODS: Ten patients (aged 58.4 ± 8.3 years [range, 44-73 years], 6 males, 4 females) with a total of 11 HNSCC were prospectively enrolled. Activity mapping and standard uptake values (SUV) from both 68Ga-NODAGA-RGD and 18F-FDG PET/CT scans were recorded for primary tumor and compared with the Wilcoxon signed-rank test. The relation between the SUV of both tracers was assessed using the Spearman correlation. RESULTS: All HNSCC tumors were visible with both tracers. Quantitative analysis showed higher 18F-FDG SUVmax in comparison to 68Ga-NODAGA-RGD (14.0 ± 6.1 versus 3.9 ± 1.1 g/mL, p = 0.0017) and SUVmean (8.2 ± 3.1 versus 2.0 ± 0.8 g/mL, p = 0.0017). Both 18F-FDG and 68Ga-NODAGA-RGD uptakes were neither correlated with grade, HPV status nor p16 protein expression (p ≥ 0.17). CONCLUSION: All HNSCC tumors were detected with both tracers with higher uptake with 18F-FDG, however. 68Ga-NODAGA-RGD has a different spatial distribution than 18F-FDG bringing different tumor information. TRIAL REGISTRATION: NCT, NCT02666547. Registered 12.8.2012.
ABSTRACT
Anosmia associated or not with dysgeusia seems to be a frequent symptom in cases of infection with SARS-CoV-2 responsible for COVID-19. It can be the initial symptom of the disease or remain isolated in pauci-symptomatic patients. Waiting for scientific confirmation and in the context of the current pandemic, it seems essential to consider any patient with a new anosmia as being infected with SARS-CoV-2 until proven otherwise. These patients should therefore isolate themselves and remain alert to the occurrence of other symptoms suggestive of the infection and/or be tested. Topical and systemic corticosteroids and nose washes are contraindicated. The natural course of anosmia seems to be favorable in most cases.
L'anosmie associée ou non à la dysgueusie semble être un symptôme fréquent en cas d'infection au SARS-CoV-2 responsable du COVID-19. Elle peut être le symptôme initial de la maladie ou rester isolée chez certains patients paucisymptomatiques. Dans l'attente de confirmations scientifiques et dans le contexte de pandémie actuelle, il semble primordial de considérer tout patient présentant une anosmie nouvelle comme étant infecté par le SARS-CoV-2 jusqu'à preuve du contraire. Ces patients devraient donc s'auto-isoler et rester attentifs à l'apparition des autres symptômes évocateurs de l'infection et/ou se faire tester. Les corticoïdes topiques et systémiques ainsi que les rinçages nasaux sont contre-indiqués. L'évolution naturelle de l'anosmie semble favorable dans la plupart des cas.
Subject(s)
Betacoronavirus , Coronavirus Infections/complications , Olfaction Disorders , Pneumonia, Viral/complications , COVID-19 , Coronavirus Infections/diagnosis , Humans , Olfaction Disorders/virology , Pandemics , Pneumonia, Viral/diagnosis , SARS-CoV-2ABSTRACT
The incidence of differentiated thyroid cancers has increased in the past 30 years, mainly due to overdiagnosis. It is therefore crucial to adapt diagnostic and therapeutic approaches to avoid overtreatment that exposes patients to unnecessary risks. Accordingly, international guidelines on the subject are regularly updated. Ultrasound and cytology guide the management for thyroid nodules. Some microcarcinomas can now be actively followed without immediate surgery, and some low-risk cancers can be adequately treated with lobo-isthmectomy. The indications for central neck dissection remain controversial. Technological advances allow minimizing specific complications of thyroid surgery and facilitate scarless surgery.
Face à l'augmentation d'incidence des cancers différenciés de la thyroïde principalement due au surdiagnostic, il est crucial d'adapter les attitudes diagnostiques et thérapeutiques afin d'éviter le « surtraitement ¼ qui expose les patients à des risques non nécessaires. Dans ce but, les recommandations internationales à ce sujet sont régulièrement mises à jour. L'ultrason et la cytologie permettent d'orienter la conduite à tenir devant un nodule thyroïdien. Certains microcarcinomes sont maintenant éligibles pour un suivi actif et une lobo-isthmectomie peut être proposée pour certains cancers avérés. Les indications aux curages ganglionnaires centraux sont toujours débattues. Des évolutions technologiques permettent de réduire les complications propres à la chirurgie thyroïdienne et facilitent la réalisation d'interventions sans cicatrice visible.
Subject(s)
Thyroid Neoplasms/diagnosis , Thyroid Neoplasms/surgery , Thyroid Nodule/diagnosis , Thyroid Nodule/surgery , Humans , Thyroidectomy , UltrasonographyABSTRACT
BACKGROUND: Graves disease or other causes of thyrotoxicosis are frequently associated with cytopenia. Although anemia is the most common, other cell lineage can be affected. Pancytopenia is a rare complication of thyrotoxicosis. CASE PRESENTATION: We report a case of a 33-year-old Chinese man who presented a nonsevere pancytopenia in the context of a newly diagnosed Graves disease. Restauration of euthyroid state led to progressive correction of pancytopenia. CONCLUSIONS: Literature review shows other rare cases of pancytopenia. It is usually nonsevere with just extremely rare cases of transfusion reported. Evolution was always favorable after achievement of euthyroid state. Its mechanism remains poorly understood, especially because those patients have no vitamin or iron deficiency. The exact physiopathological process remains unclear but 2 causes seem to overlap: reduced production of hematopoietic cells from the bone marrow and increased destruction or sequestration of mature hematopoietic cells. Despite unclear mechanism, the presence of hematologic abnormalities including pancytopenia must not be considered as a contraindication to antithyroid drug therapy.
ABSTRACT
PURPOSE: With adequate indication and meticulous execution, endoscopic procedures can efficiently treat a subset of adult and pediatric benign laryngotracheal stenosis and obstructions, but these procedures are precise and very demanding. The difference between a successful and a failed surgery, with potentially debilitating side effects, resides in small details. The learning curve is long and very few centers worldwide have a sufficient case load making adequate training difficult. While indications and concepts of endoscopic procedures can be learned in books and by observing trained colleagues, the dexterity and the precise realization need to be practiced, ideally not initially on patients. METHODS: We describe here the lamb model system for the initial training in such procedures. We provide a step-by-step guide for endoscopic approaches intended to treat pathologies such as laryngomalacia, bilateral vocal fold paralysis, posterior glottic stenosis, and laryngotracheal clefts. CONCLUSIONS: The lamb model system does not pose ethical issues, and it is easy to obtain and to handle. It was used during an international training course for laryngotracheal stenosis by novice and advanced airway surgeons. It was unanimously judged as relevant and useful by the participants.
Subject(s)
Endoscopy/education , Laryngostenosis/surgery , Larynx/surgery , Laser Therapy/methods , Lasers, Gas/therapeutic use , Otolaryngology/education , Tracheal Stenosis/surgery , Animals , Disease Models, Animal , Endoscopy/methods , Sheep , Surgical Equipment , Treatment OutcomeABSTRACT
OBJECTIVE: Upper airway malacia highly complicates the treatment of benign laryngotracheal stenosis, and no ideal option is available to date. We here explore the use of extraluminal biodegradable splints in an animal model of long-segment anterior tracheomalacia (TM). We show the efficacy, as well as the tissue tolerance, of a custom-made biodegradable extraluminal device surgically inserted around the trachea. STUDY DESIGN: Preclinical animal study. METHODS: Anterior TM was induced in rabbits through an anterior neck approach by removing eight consecutive anterior tracheal rings without damaging the underlying mucosa. Malacia was corrected during the same surgery by pexy sutures, suspending the tracheal mucosa to an experimental biodegradable device. Symptoms, survival, and tissue reaction were compared to healthy and sham surgery controls. RESULTS: The model induced death by respiratory failure within minutes. Ten animals received the experimental treatment, and those who survived the perioperative period remained asymptomatic with a maximum follow-up of 221 days. Histological studies at programmed euthanasia showed complete degradation of the prosthesis, with significant remnant fibrosis around the trachea. However, the tracheal stiffness of test segments was comparatively less than that of control segments. CONCLUSION: Extraluminal biodegradable splints rescued animals with a condition otherwise incompatible with life. It was well tolerated, leaving peritracheal fibrosis that was not as stiff as normal trachea. The external tracheal stiffening was sufficient for the test animals to live through the phase of severe acute hypercollapsibility. This represents a valid option to help pediatric patients with laryngotracheal stenosis and associated cartilaginous airway malacia. LEVEL OF EVIDENCE: NA. Laryngoscope, 128:E53-E58, 2018.
Subject(s)
Absorbable Implants/adverse effects , Splints/adverse effects , Tracheomalacia/surgery , Animals , Disease Models, Animal , Endoscopy/methods , Female , Prospective Studies , Rabbits , Survival Rate , Trachea/surgeryABSTRACT
OBJECTIVES: To evaluate the role of endovascular stents in temporary tracheal stenting and endoscopic treatment strategy for patients with severe refractory tracheal stenosis following slide tracheoplasty. METHODS: Two patients had severe tracheal stenosis after slide tracheoplasty for long segment congenital tracheal stenosis. Both these patients were managed endoscopically and an endovascular prosthesis was used to temporarily stent the trachea. Short and long term results were evaluated clinically and with repeated endoscopies. RESULTS: The 2 patients had an excellent recovery immediately after the stent placement and continue to have an optimal, age-appropriate stable tracheal diameter after stent removal. CONCLUSION: Endovascular stents can be temporarily used to stent the trachea in the endoscopic treatment strategy to correct refractory severe tracheal stenosis following slide tracheoplasty.