-
Development (Cambridge, England) Dec 2022Developmentally, the great vessels of the heart originate from the pharyngeal arch arteries (PAAs). During PAA vasculogenesis, PAA precursors undergo sequential cell...
Developmentally, the great vessels of the heart originate from the pharyngeal arch arteries (PAAs). During PAA vasculogenesis, PAA precursors undergo sequential cell fate decisions that are accompanied by proliferative expansion. However, how these two processes are synchronized remains poorly understood. Here, we find that the zebrafish chemokine receptor Cxcr4a is expressed in PAA precursors, and genetic ablation of either cxcr4a or the ligand gene cxcl12b causes PAA stenosis. Cxcr4a is required for the activation of the downstream PI3K/AKT cascade, which promotes not only PAA angioblast proliferation, but also differentiation. AKT has a well-known role in accelerating cell-cycle progression through the activation of cyclin-dependent kinases. Despite this, we demonstrate that AKT phosphorylates Etv2 and Scl, the key regulators of angioblast commitment, on conserved serine residues, thereby protecting them from ubiquitin-mediated proteasomal degradation. Altogether, our study reveals a central role for chemokine signaling in PAA vasculogenesis through orchestrating angioblast proliferation and differentiation.
Topics: Animals; Branchial Region; Zebrafish; Phosphatidylinositol 3-Kinases; Proto-Oncogene Proteins c-akt; Arteries; Chemokines; Cell Division
PubMed: 36468454
DOI: 10.1242/dev.200754 -
Cureus Jan 2023Behçet's disease is a refractory inflammatory disease characterized by recurrent oral aphthous ulcers. Ulcers are commonly seen in the oral cavity and the pharyngeal...
Behçet's disease is a refractory inflammatory disease characterized by recurrent oral aphthous ulcers. Ulcers are commonly seen in the oral cavity and the pharyngeal region. In patients with recurrent pharyngeal ulcers, pharyngeal stenosis may occur and leads to dysphagia. Herein, we report a case of pharyngeal stenosis caused by recurrent ulcers due to incomplete Behçet's disease. Prednisolone, colchicine, and infliximab were administered and resolved the pharyngeal ulcers, however, dysphagia persisted. To improve the swallowing function, a pharyngeal dilation surgery and transoral videolaryngoscopic surgery were performed, which resulted in an enlarged pharyngeal cavity. Oral intake of water was initiated the day after surgery, and after six days, the patient was able to take a normal diet. The pharyngeal stenosis had not recurred for one year after the surgery, and a normal diet continued without any dietary restrictions. Therefore, in a case of a severe oropharyngeal lesion, periodic follow-up and surgical interventions by an otolaryngologist are necessary.
PubMed: 36788822
DOI: 10.7759/cureus.33616 -
Journal of Medical Cases Nov 2023Abrupt loss of focal brain function is the main characteristic of the beginning of ischemic stroke. However, individuals with disorders other than stroke can also...
Abrupt loss of focal brain function is the main characteristic of the beginning of ischemic stroke. However, individuals with disorders other than stroke can also present with similar features. These conditions include seizure disorders, migraine, central nervous system abscess or tumor, head trauma, subdural hematoma, cerebral venous thrombosis, viral encephalitis, conversion reaction, hypertensive encephalopathy, multiple sclerosis, and spinal cord disorder. An 82-year-old man presented with a sudden onset of numbness in his left forearm in the distribution of C6 and C7 spinal nerves, 2 days after undergoing endarterectomy and stent placement in his right carotid artery because of stenosis. He was diagnosed with hypo-pharyngeal squamous cell carcinoma (T1, L0, M0) 17 years earlier (2006) which was treated with 70 Gy intensity-modulated radiotherapy (IMRT). The patient underwent stent insertion into his left carotid artery 3.5 years earlier because of 80% carotid artery stenosis. He was initially suspected to have an ischemic stroke. However, computed tomography angiography of the head and neck did not show stenosis or occlusion of the major intracranial arteries and no aneurysms were identified. It showed interval stenting of the cervical portion of the right carotid artery and stable appearance of left carotid artery stent. Both carotid artery stents and the vertebral arteries were patent. The cervical spine showed bilateral moderate to severe foramen stenosis in C3-C4 and C5-C6, and moderate to severe stenosis in the right C2-C3 and left C4-C5. His symptoms subsided after performing neck extension exercises. This is the first report of a patient whose cervical radiculopathy symptoms were suspected to be caused by ischemic stroke. The recent angioplasty and stent placement in the right carotid artery made the association more likely and had to be excluded. Clinicians should be aware that cervical radiculopathy could present as ischemic stroke. It is therefore important that disorders that cause symptoms similar to ischemic stroke are also considered in these individuals.
PubMed: 38029053
DOI: 10.14740/jmc4162 -
Arquivos Brasileiros de Cirurgia... 2015The occurrence of the pharyngoesophageal, or Zenker diverticulum is not frequent in the national scenario, and the technique of the diverticulectomy with cricomyotomy in... (Comparative Study)
Comparative Study
BACKGROUND
The occurrence of the pharyngoesophageal, or Zenker diverticulum is not frequent in the national scenario, and the technique of the diverticulectomy with cricomyotomy in medium and great dimension diverticula is still the most indicated. Because the resection of the diverticulum requires the suture of the pharynx, dehiscence can occur, thereafter delaying swallowing. Hence, the idea is to accomplish this surgical procedure, comparing the manual and mechanical suture, in order to evaluate the real benefit of the mechanical technique.
AIM
To evaluate the results of the pharyngoesophageal diverticulectomy with cricomyotomy using manual and mechanical suture with regard to local and systemic complications.
METHOD
Fifty-seven patients with pharyngoesophageal diverticula diagnosed through high digestive endoscopy and pharyngeal esophagogram were studied. The applied surgical technique was diverticulectomy with myotomy of the cricopharyngeal muscle, done in 24 patients (42.2%) the mechanical suture (group A) with the mechanical linear suture device and in 33 (57.8%) a manual closure of the pharynx (group B).
RESULTS
In the postoperative period, one patient of group A (4.1%) presented fistula caused by dehiscence of the pharyngeal suture, and three of group B (15.1%) presented the same complication, with a good outcome using a conservative treatment. In the same group, three patients (9.0%) presented stenosis of the suture of the pharynx, with good outcome and with endoscopic dilatations, and no patient from group A presented such complication. Lung infection was present in five patients, being two (8.3%) of group A and three (9.0%) on B, having good outcomes after specific treatment. In the late review, done with 43 patients (94.4%) of group A and 22 (88.0%) on B, the patients declared to be pleased with the surgical procedure, because they were able to regain normal swallowing.
CONCLUSION
The diverticulectomy with myotomy and pharyngeal closure using mechanical suture was proven appropriate, for having restored regular swallowing in most of the patients, and the mechanical closure of the pharynx proved to be more effective in comparison to the manual one, because it provided a lower index of local post-surgical complications.
Topics: Aged; Aged, 80 and over; Digestive System Surgical Procedures; Female; Humans; Male; Middle Aged; Pharyngeal Muscles; Suture Techniques; Zenker Diverticulum
PubMed: 26734791
DOI: 10.1590/S0102-6720201500040005 -
Endoscopy Feb 2020
Topics: Constriction, Pathologic; Dissection; Endoscopy; Humans; Pharyngeal Diseases
PubMed: 31529441
DOI: 10.1055/a-0989-2345 -
Journal of the American Veterinary... Jul 2021A 3-year-old 17.5-kg (38.5-lb) mixed-breed dog was referred for evaluation because of nasal discharge, sneezing, and signs of nasal congestion of approximately 9 months'...
CASE DESCRIPTION
A 3-year-old 17.5-kg (38.5-lb) mixed-breed dog was referred for evaluation because of nasal discharge, sneezing, and signs of nasal congestion of approximately 9 months' duration. A diagnosis of nasopharyngeal stenosis (NPS) was made prior to referral.
CLINICAL FINDINGS
Sneezing, bilateral mucopurulent nasal discharge, reduced nasal airflow, stertor, and increased inspiratory effort were noted on physical examination. Results of serum biochemical analysis were within respective reference ranges. Review of CT images of the skull revealed findings consistent with severe bilateral partial osseous choanal atresia and NPS. Retrograde rhinoscopy confirmed membranous NPS.
TREATMENT AND OUTCOME
A ventral rhinotomy was performed; communication between the pharynx and nasal passageway was reestablished by surgical debridement of the caudal border of the palatine bone and vomerine crest and groove, followed by dissection of the membranous NPS and reconstruction of the caudal part of the nasopharynx. A covered nasopharyngeal stent was placed in the newly established nasopharynx. The dog recovered uneventfully but was presented 3 weeks later with recurrent signs; diagnostic findings were consistent with stenosis rostral to the stent. The stenosis was treated with balloon dilation, and a second covered stent was placed rostral to and overlapping the first stent, spanning the stenotic region. Eleven months after this procedure, the dog was doing well.
CLINICAL RELEVANCE
Results for this patient suggested that ventral rhinotomy and covered nasopharyngeal stent placement can be used successfully for the management of osseous choanal atresia in dogs; however, careful attention to preoperative planning and potential complications is necessary.
Topics: Animals; Choanal Atresia; Constriction, Pathologic; Dog Diseases; Dogs; Endoscopy; Nasopharyngeal Diseases; Stents
PubMed: 34227860
DOI: 10.2460/javma.259.2.190 -
The Laryngoscope Jun 2021Long-term functional outcomes are poorly characterized for salvage laryngectomy. We identified predictors of esophageal stricture and swallowing function after salvage...
BACKGROUND
Long-term functional outcomes are poorly characterized for salvage laryngectomy. We identified predictors of esophageal stricture and swallowing function after salvage laryngectomy in a large cohort.
METHODS
A retrospective study of 233 patients who underwent salvage total laryngectomy for recurrent/persistent squamous cell carcinoma of the larynx or hypopharynx after radiation (XRT) or chemoradiation (CRT) was performed. Primary outcomes were esophageal dilation within 1 year, time to dilation, and gastrostomy tube dependence. Multivariate logistic and Cox regressions were used for statistical analysis.
RESULTS
Dilation was performed in 29.9% of patients. Dilation was twice as likely in patients with post-operative fistula compared to those without (Hazard Ratio (HR) 2.10, 95% Confidence Interval (CI) 1.06-4.13, P = .03). Every year between XRT/CRT and salvage was associated with 10% increase in dilation (HR 1.09, 95% CI 1.03-1.17, P = .01). No factors were associated with dilation by 1 year. About 10% of patients were at least partially gastrostomy tube-dependent 1 year post-operatively. At last follow-up (median 29 months), this rate was 13%. Patients with supraglottic recurrence had an increased risk of gastrostomy tube dependence at 1 year compared to glottic (OR 16.7, 95% CI 1.73-160, P = .02). For every 10 pack years pre-salvage, the OR of requiring tube feeds at last follow-up was 1.24 (95% CI 1.04-1.48, P = .02).
CONCLUSIONS
Fistula and pre-salvage smoking were associated with stricture post-salvage laryngectomy. No factors were associated with dilation by 1 year. Supraglottic recurrence and smoking were associated with gastrostomy tube dependence. These findings are important for pre-operative counseling prior to salvage laryngectomy.
LEVEL OF EVIDENCE
Level 4 Laryngoscope, 131:1229-1234, 2021.
Topics: Aged; Carcinoma, Squamous Cell; Constriction, Pathologic; Deglutition; Esophageal Fistula; Esophageal Stenosis; Female; Gastrostomy; Humans; Hypopharyngeal Neoplasms; Hypopharynx; Laryngeal Neoplasms; Laryngectomy; Larynx; Logistic Models; Male; Middle Aged; Neoplasm Recurrence, Local; Odds Ratio; Postoperative Complications; Postoperative Period; Proportional Hazards Models; Retrospective Studies; Salvage Therapy; Smoking; Time Factors; Treatment Outcome
PubMed: 33152117
DOI: 10.1002/lary.29215 -
Pediatrics and Neonatology Feb 2018Esophageal stenosis (ES) is characterized by dysphagia, failure to thrive, and long-term disability. It requires repeated management because it is refractory....
BACKGROUND
Esophageal stenosis (ES) is characterized by dysphagia, failure to thrive, and long-term disability. It requires repeated management because it is refractory. Traditionally, these procedures are performed under general anesthesia with airway intubation.
PURPOSE
This study investigated the safety and efficacy of the management of interventional flexible endoscopy (IFE) performed with a novel noninvasive ventilation (NIV) support.
METHODS
Use of a short-length flexible endoscope with NIV of pharyngeal oxygen, nose closure, and abdominal compression during IFE was investigated. Medical charts of patients aged ≤10 years with a diagnosis of ES in our hospital between 1990 and 2014 were reviewed and analyzed. The outcome measurement included the number of IFE with balloon dilatation (BD), laser therapy (LT), stent placement, procedural complications, and the success rate.
RESULTS
Ten patients were enrolled. The most common etiologies were esophageal atresia with/without tracheoesophageal fistula (n = 6), followed by caustic injury (n = 2), and unknown etiology (n = 2). Nine patients who were considered successfully managed received an average of 2.8 BD sessions and 1.6 LT sessions. The complication rate of IFE in this study was 1.08% (1/93). One esophageal perforation developed after BD (1/63) and none after LT (0/30).
CONCLUSION
In this study, IFE with this NIV support is a safe, feasible and valuable modality which could rapidly examine and manage ES.
Topics: Child; Child, Preschool; Esophageal Stenosis; Esophagoscopy; Feasibility Studies; Female; Humans; Infant; Infant, Newborn; Male; Noninvasive Ventilation; Retrospective Studies; Treatment Outcome
PubMed: 28587747
DOI: 10.1016/j.pedneo.2016.11.003 -
ORL; Journal For Oto-rhino-laryngology... 2023Free jejunal flap (FJF) reconstruction is a standard procedure for pharyngeal and cervical esophageal defects resulting from head and neck cancer resection. However,... (Observational Study)
Observational Study
INTRODUCTION
Free jejunal flap (FJF) reconstruction is a standard procedure for pharyngeal and cervical esophageal defects resulting from head and neck cancer resection. However, improvements in patients' quality of life after surgery require a further statistical approach.
METHODS
An observational, retrospective, multivariate analysis was designed to report the incidence of postoperative complications and their association with clinical factors in 101 patients who underwent total pharyngo-laryngo-esophagectomy and FJF reconstruction for head and neck cancer at a university hospital between January 2007 and December 2020.
RESULTS
Postoperative complications were observed in 69% of patients. In the reconstructive site, anastomotic leak, observed in 8% of patients was associated with vascular anastomosis in the external jugular vein system (age-adjusted odds ratio [OR]: 9.05, p = 0.044) and anastomotic stricture, observed in 11% of patients was associated with postoperative radiotherapy (age-adjusted OR: 12.60, p = 0.02). Cervical skin flap necrosis was the most common complication (34%) and was associated with vascular anastomosis on the right cervical side (age- and sex-adjusted OR: 4.00, p = 0.005).
CONCLUSION
Although FJF reconstruction is a useful procedure, 69% of patients suffer a postoperative complication. We suppose that anastomotic leak is related to the low blood flow resistance of the FJF and inadequate drainage of the external jugular venous system, and anastomotic stricture is related to the vulnerability of the intestinal tissue to radiation. Furthermore, we hypothesized that the location of the vascular anastomosis may affect the mesenteric location of the FJF and the dead space in the neck, leading to the development of cervical skin flap necrosis. These data contribute to increasing our knowledge about postoperative complications related to FJF reconstruction.
Topics: Humans; Esophagectomy; Anastomotic Leak; Retrospective Studies; Constriction, Pathologic; Quality of Life; Head and Neck Neoplasms; Postoperative Complications; Necrosis; Esophageal Neoplasms
PubMed: 37285823
DOI: 10.1159/000530920 -
World Neurosurgery Nov 2019Complete control of back bleeding during carotid endarterectomy (CEA) is important. We investigated the causes of back bleeding during CEA and techniques for the control...
OBJECTIVE
Complete control of back bleeding during carotid endarterectomy (CEA) is important. We investigated the causes of back bleeding during CEA and techniques for the control of bleeding.
METHODS
A retrospective review was performed of 214 CEA procedures. We assessed the results of routine preoperative examinations, instruments used for arterial clamping (vessel loop and crude or bulldog clamps), and severity of carotid artery stenosis and arterial wall calcification. The study end point was incomplete control of back bleeding before arteriotomy. Factors associated with back bleeding were identified by univariate analysis. The culprit artery and intraoperative technique used in patients with back bleeding were also determined.
RESULTS
Transient back bleeding occurred in 19 CEA procedures (8.9%). Back bleeding was from the ascending pharyngeal artery in 9 cases, common carotid artery in 8 cases, and external carotid artery in 2 cases. Univariate analysis identified the following factors as being related to incomplete control of back bleeding: moderate carotid artery stenosis (20 mm thick) and use of bulldog clamps.
CONCLUSIONS
Transient back bleeding during CEA was uncommon, with the risk factors being severe carotid calcification and moderate carotid stenosis. Transient back bleeding was managed by clamping an undetected ascending pharyngeal artery or by additional clamping of the common carotid or external carotid artery. The vessel loop and crude were superior to the bulldog clamp for clamping the carotid artery.
Topics: Aged; Aged, 80 and over; Anticoagulants; Carotid Stenosis; Computed Tomography Angiography; Constriction; Endarterectomy, Carotid; Female; Hemodynamics; Humans; Intraoperative Complications; Male; Multidetector Computed Tomography; Pharynx; Platelet Aggregation Inhibitors; Retrospective Studies; Risk Factors; Severity of Illness Index; Vascular Calcification
PubMed: 31336174
DOI: 10.1016/j.wneu.2019.07.114