scholarly journals Utility of Rescue Flap in the Reconstruction of Skull Base Defects Following Transnasal Endoscopic Excision of Sellar/Supra-sellar Lesions

2021 ◽  
pp. 904-910
Author(s):  
Arjun Saini ◽  
Shraddha Jain ◽  
P. A. Deshkar
Keyword(s):  
Skull Base ◽  
Donor Site ◽  
Donor Site Morbidity ◽  
Csf Leak ◽  
Bony Defect ◽  
Nasoseptal Flap ◽  
Posterior Aspect ◽  
Csf Rhinorrhea ◽  
Sellar Lesions ◽  
Operative Outcome

Background: Naso-septal Rescue Flap(NSRF) technique involves the preservation of unilateral posterior septal artery pedicle without harvesting full Naso-Septal Flap (NSF). This enables usage of NSF flap when needed while allowing enough exposure to resect tumor completely. This also provides with added advantage of tailoring flap according to preference to cover the defect post tumor removal. This technique involves partial harvestation of only the most superior and posterior aspect of the flap to protect its pedicle, providing better instrumentation for the sphenoid sinus. At the end of the procedure, if there is unexpected CSF rhinorrhea or resultant bony defect is large then Nasoseptal flap is harvested from the rescue flap. As very few studies have been conducted for rescue flap technique in anterior skull base defect reconstruction following excision of sellar/supra-sellar lesions, the technique requires further validation, hence the present study is being undertaken. Objectives: To study the post-operative outcome of Nasal Septal Rescue Flap (NSRF) in terms of donor site morbidity and CSF leak. To study the post-operative outcome of posterior nasoseptal flap in terms of donor site morbidity and CSF leak. Methodology: A cross-sectional study will be conducted at Department of E.N.T, AVBRH, Sawangi Wardha, during a period of August 2020 to August 2021. A sample size of 20 within 18 -70 years of age with sellar/supra-sellar lesions will be included for the research. Results: The observations obtained will be analyzed statistically and will be discussed in light of literature available. Conclusion: This study will help in formulating the guidelines for the NSF harvest with the goal of preventing unnecessary harvest, thereby decreasing peri-operative and post-operative disadvantages as well as preserving the flap for reconstruction in patients requiring revision surgery.

scholarly journals Identification and repair of intraoperative cerebrospinal fluid leaks in endonasal transsphenoidal pituitary surgery: surgical experience in a series of 1002 patients

2018 ◽  
Vol 129 (2) ◽  
pp. 425-429 ◽  
Author(s):  
Ben A. Strickland ◽  
Joshua Lucas ◽  
Brianna Harris ◽  
Edwin Kulubya ◽  
Joshua Bakhsheshian ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Pituitary Adenomas ◽  
Transsphenoidal Approach ◽  
Csf Leak ◽  
Sellar Region ◽  
Inclusion Criteria ◽  
Csf Rhinorrhea ◽  
Sellar Lesions ◽  
Sellar Reconstruction ◽  
Csf Leaks

OBJECTIVECerebrospinal fluid (CSF) rhinorrhea is among the most common complications following transsphenoidal surgery for sellar region lesions. The aim of this study was to review the authors’ institutional experience in identifying, repairing, and treating CSF leaks associated with direct endonasal transsphenoidal operations.METHODSThe authors performed a retrospective review of cases involving surgical treatment of pituitary adenomas and other sellar lesions at the University of Southern California between December 1995 and March 2016. Inclusion criteria included all pathology of the sellar region approached via a direct microscopic or endoscopic endonasal transsphenoidal approach. Demographics, pathology, intraoperative and postoperative CSF leak rates, and other complications were recorded and analyzed. A literature review of the incidence of CSF leaks associated with the direct endonasal transsphenoidal approach to pituitary lesions was conducted.RESULTSA total of 1002 patients met the inclusion criteria and their cases were subsequently analyzed. Preoperative diagnoses included pituitary adenomas in 855 cases (85.4%), Rathke’s cleft cyst in 94 (9.4%), and other sellar lesions in 53 (5.2%). Lesions with a diameter ≥ 1 cm made up 49% of the series. Intraoperative repair of an identified CSF leak was performed in 375 cases (37.4%) using autologous fat, fascia, or both. An additional 92 patients (9.2%) underwent empirical sellar reconstruction without evidence of an intraoperative CSF leak. Postoperative CSF leaks developed in 26 patients (2.6%), including 13 (1.3% of the overall group) in whom no intraoperative leak was identified. Among the 26 patients who developed a postoperative CSF leak, 13 were noted to have intraoperative leak and underwent sellar repair while the remaining 13 did not have an intraoperative leak or sellar repair. No patients who underwent empirical sellar repair without an intraoperative leak developed a postoperative leak. Eight patients underwent additional surgery (0.8% reoperation rate) for CSF leak repair, and 18 were successfully treated with lumbar drainage or lumbar puncture alone. The incidence of postoperative CSF rhinorrhea in this series was compared with that in 11 other reported series that met inclusion criteria, with incidence rates ranging between 0.6% and 12.1%.CONCLUSIONSIn this large series, half of the patients who developed postoperative CSF rhinorrhea had no evidence of intraoperative CSF leakage. Unidentified intraoperative CSF leaks and/or delayed development of CSF fistulas are equally important sources of postoperative CSF rhinorrhea as the lack of employing effective CSF leak repair methods. Empirical sellar reconstruction in the absence of an intraoperative CSF leak may be of benefit following resection of large tumors, especially if the arachnoid is thinned out and herniates into the sella.

Detection of Cerebrospinal Fluid Leaks Using the Endoscopic Fluorescein Test in the Post-Operative Period Following Pituitary and Ventral Skull Base Surgery

2021 ◽  
Author(s):  
Peter A. Benedict ◽  
Joseph R. Connors ◽  
Micah R. Timen ◽  
Nupur Bhatt ◽  
Richard Lebowitz ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Skull Base ◽  
Postoperative Period ◽  
Skull Base Surgery ◽  
Tertiary Care ◽  
Csf Leak ◽  
Csf Rhinorrhea ◽  
Predictive Values ◽  
Ventral Skull Base ◽  
Csf Leaks

Objective: Diagnosis of cerebrospinal fluid (CSF) leaks is sometimes challenging in the postoperative period following pituitary and ventral skull base surgery. Intrathecal fluorescein (ITF) may be useful in this setting. Design: Retrospective chart review Setting: Tertiary care center Methods and Participants: All patients who underwent pituitary and ventral skull base surgery performed by a single rhinologist between January 2017–March 2020 were included. There were 103 patients identified. Eighteen patients received 20 ITF injections due to clinical suspicion for CSF leak during the postoperative period without florid CSF rhinorrhea on clinical exam. Computed tomography scans with new or increasing intracranial air and intra-operative findings were used to confirm CSF leaks. Clinical courses were reviewed for at least 6 months after initial concern for leak as the final determinate of CSF leak. Main Outcome Measures: Specificity and safety of ITF Results: Eleven (61%) ITF patients were female and 7 (39%) were male. Average patient age was 52.50±11.89. There were 6 patients with confirmed postoperative CSF leaks, 3 of whom had evaluations with ITF. ITF use resulted in 2 true positives, 1 false negative, 17 true negatives and 0 false positives. ITF sensitivity was 67%, specificity was 100%, and positive and negative predictive values were 100% and 94.4%, respectively. There were no adverse effects from ITF use. Conclusions: Existing modalities for detecting postoperative CSF leaks suffer from suboptimal sensitivity and specificity, delayed result reporting, or limited availability. Intrathecal fluorescein represents a specific and safe test with potential utility in the postoperative setting.

scholarly journals Endoscopic Endonasal Reconstruction of High-Flow Cerebrospinal Fluid Leak with Fascia Lata “Button” Graft and Nasoseptal Flap: Surgical Technique and Case Series

2019 ◽  
Vol 81 (06) ◽  
pp. 645-650
Author(s):  
Roshni V. Khatiwala ◽  
Karthik S. Shastri ◽  
Maria Peris-Celda ◽  
Tyler Kenning ◽  
Carlos D. Pinheiro-Neto
Keyword(s):  
Cerebrospinal Fluid ◽  
Skull Base ◽  
Fascia Lata ◽  
High Flow ◽  
Csf Leak ◽  
Nasoseptal Flap ◽  
Endoscopic Endonasal ◽  
Skull Base Reconstruction ◽  
Csf Diversion ◽  
Csf Leaks

Abstract Background The endoscopic endonasal approach (EEA) has become increasingly used for resection of skull base tumors in the sellar and suprasellar regions. A nasoseptal flap (NSF) is routinely used for anterior skull base reconstruction; however, there are numerous additional allografts and autografts being used in conjunction with the NSF. The role of perioperative cerebrospinal fluid (CSF) diversion is also unclear. Objective This study was aimed to analyze success of high-flow CSF leak repair during EEA procedures without use of CSF diversion through lumbar drainage. Methods A retrospective chart review of patients who had intraoperative high-flow CSF leak during EEA procedures at our institution between January 2013 and December 2017 was performed. CSF leaks were repaired with use of a fascia lata button graft and nasoseptal flap, without use of perioperative lumbar drains. Results A total of 38 patients were identified (10 male, 28 female). Patient BMIs ranged from 19.7 to 49 kg/m2 (median = 31 kg/m2), with 18 patients meeting criteria for obesity (BMI > 30 kg/m2) and 12 patients overweight (25 kg/m2 < BMI < 29.9 kg/m2). There was no incidence of postoperative CSF leak. Conclusion In our experience, the nasoseptal flap used in conjunction with the fascia lata button graft is a safe, effective and robust combination for cranial base reconstruction with high-flow intraoperative CSF leaks, without need for lumbar drains.

Surgical nuances for nasoseptal flap reconstruction of cranial base defects with high-flow cerebrospinal fluid leaks after endoscopic skull base surgery

2012 ◽  
Vol 32 (6) ◽  
pp. E7 ◽  
Author(s):  
James K. Liu ◽  
Richard F. Schmidt ◽  
Osamah J. Choudhry ◽  
Pratik A. Shukla ◽  
Jean Anderson Eloy
Keyword(s):  
Skull Base ◽  
Skull Base Surgery ◽  
Cranial Base ◽  
High Flow ◽  
Csf Leak ◽  
Reconstruction Technique ◽  
Dural Defect ◽  
Nasoseptal Flap ◽  
Endoscopic Skull Base Surgery ◽  
Csf Leakage

Extended endoscopic endonasal approaches have allowed for a minimally invasive solution for removal of a variety of ventral skull base lesions, including intradural tumors. Depending on the location of the pathological entity, various types of surgical corridors are used, such as transcribriform, transplanum transtuberculum, transsellar, transclival, and transodontoid approaches. Often, a large skull base dural defect with a high-flow CSF leak is created after endoscopic skull base surgery. Successful reconstruction of the cranial base defect is paramount to separate the intracranial contents from the paranasal sinus contents and to prevent postoperative CSF leakage. The vascularized pedicled nasoseptal flap (PNSF) has become the workhorse for cranial base reconstruction after endoscopic skull base surgery, dramatically reducing the rate of postoperative CSF leakage since its implementation. In this report, the authors review the surgical technique and describe the operative nuances and lessons learned for successful multilayered PNSF reconstruction of cranial base defects with high-flow CSF leaks created after endoscopic skull base surgery. The authors specifically highlight important surgical pearls that are critical for successful PNSF reconstruction, including target-specific flap design and harvesting, pedicle preservation, preparation of bony defect and graft site to optimize flap adherence, multilayered closure technique, maximization of the reach of the flap, final flap positioning, and proper bolstering and buttressing of the PNSF to prevent flap dehiscence. Using this technique in 93 patients, the authors' overall postoperative CSF leak rate was 3.2%. An illustrative intraoperative video demonstrating the reconstruction technique is also presented.

Lack of causal association between spontaneous intracranial hypotension and cranial cerebrospinal fluid leaks

2012 ◽  
Vol 116 (4) ◽  
pp. 749-754 ◽  
Author(s):  
Wouter I. Schievink ◽  
Marc S. Schwartz ◽  
M. Marcel Maya ◽  
Franklin G. Moser ◽  
Todd D. Rozen
Keyword(s):  
Skull Base ◽  
Intracranial Hypotension ◽  
Spontaneous Intracranial Hypotension ◽  
Csf Leak ◽  
Csf Rhinorrhea ◽  
Spinal Imaging ◽  
Radiological Data ◽  
Single Instance ◽  
Csf Leakage ◽  
Csf Leaks

Object Spontaneous intracranial hypotension is an important cause of headaches and an underlying spinal CSF leak can be demonstrated in most patients. Whether CSF leaks at the level of the skull base can cause spontaneous intracranial hypotension remains a matter of controversy. The authors' aim was to examine the frequency of skull base CSF leaks as the cause of spontaneous intracranial hypotension. Methods Demographic, clinical, and radiological data were collected from a consecutive group of patients evaluated for spontaneous intracranial hypotension during a 9-year period. Results Among 273 patients who met the diagnostic criteria for spontaneous intracranial hypotension and 42 who did not, not a single instance of CSF leak at the skull base was encountered. Clear nasal drainage was reported by 41 patients, but a diagnosis of CSF rhinorrhea could not be established. Four patients underwent exploratory surgery for presumed CSF rhinorrhea. In addition, the authors treated 3 patients who had a postoperative CSF leak at the skull base following the resection of a cerebellopontine angle tumor and developed orthostatic headaches; spinal imaging, however, demonstrated the presence of a spinal source of CSF leakage in all 3 patients. Conclusions There is no evidence for an association between spontaneous intracranial hypotension and CSF leaks at the level of the skull base. Moreover, the authors' study suggests that a spinal source for CSF leakage should even be suspected in patients with orthostatic headaches who have a documented skull base CSF leak.

scholarly journals Skull Base Reconstruction in the Pediatric Patient

2018 ◽  
Vol 79 (01) ◽  
pp. 081-090 ◽  
Author(s):  
Irit Duek ◽  
Alon Pener-Tessler ◽  
Ravit Yanko-Arzi ◽  
Arik Zaretski ◽  
Avraham Abergel ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Children And Adolescents ◽  
Skull Base ◽  
Donor Site ◽  
Donor Site Morbidity ◽  
Soft Tissue Reconstruction ◽  
Cumulative Impact ◽  
Skull Base Reconstruction ◽  
Unique Challenge ◽  
First Choice

Introduction Pediatric skull base and craniofacial reconstruction presents a unique challenge since the potential benefits of therapy must be balanced against the cumulative impact of multimodality treatment on craniofacial growth, donor-site morbidity, and the potential for serious psychosocial issues. Objectives To suggest an algorithm for skull base reconstruction in children and adolescents after tumor resection. Materials and Methods Comprehensive literature review and summary of our experience. Results We advocate soft-tissue reconstruction as the primary technique, reserving bony flaps for definitive procedures in survivors who have reached skeletal maturity. Free soft-tissue transfer in microvascular technique is the mainstay for reconstruction of large, three-dimensional defects, involving more than one anatomic region of the skull base, as well as defects involving an irradiated field. However, to reduce total operative time, intraoperative blood loss, postoperative hospital stay, and donor-site morbidity, locoregional flaps are better be considered the flap of first choice for skull base reconstruction in children and adolescents, as long as the flap is large enough to cover the defect. Our “workhorse” for dural reconstruction is the double-layer fascia lata. Advances in endoscopic surgery, image guidance, alloplastic grafts, and biomaterials have increased the armamentarium for reconstruction of small and mid-sized defects. Conclusions Skull base reconstruction using locoregional flaps or free flaps may be safely performed in pediatrics. Although the general principles of skull base reconstruction are applicable to nearly all patients, the unique demands of skull base surgery in pediatrics merit special attention. Multidisciplinary care in experienced centers is of utmost importance.

Endoscopic endonasal repair of spontaneous CSF fistulae

2012 ◽  
Vol 32 (Suppl1) ◽  
pp. E6
Author(s):  
Matthew J. Tormenti ◽  
Alessandro Paluzzi ◽  
Carlos D. Pinheiro-Neto ◽  
Juan C. Fernandez-Miranda ◽  
Carl H. Snyderman ◽  
...  
Keyword(s):  
Donor Site ◽  
Middle Turbinate ◽  
Csf Leak ◽  
Nasoseptal Flap ◽  
Endoscopic Endonasal ◽  
Link Type ◽  
Slight Extension ◽  
Anterior Fossa

The authors present a fully endoscopic endonasal repair of a spontaneous CSF leak caused by a defect in the anterior fossa floor. Patients were positioned supine in a Mayfield headholder in slight extension. A complete ethmoidectomy was performed to expose the defect. The middle turbinate was removed to increase visualization and allow for more working room. The defect was identified and exposed. A nasoseptal flap was raised and placed over the defect. A free-mucosal graft fashioned from the removed middle turbinate was placed on the nasoseptal donor site. The video can be found here: http://youtu.be/gAN2cvQVXCE.

scholarly journals A retrospective study to analyze treatment of post traumatic cerebro spinal fluid rhinorrhea and role of trans cranial pedicled pericranial repair in present day context

2022 ◽  
Vol 7 (4) ◽  
pp. 111-118
Author(s):  
Shashivadhanan ◽  
Abhishek Mishra
Keyword(s):  
Retrospective Study ◽  
Skull Base ◽  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Spinal Fluid ◽  
Csf Leak ◽  
Care Hospital ◽  
Endoscopic Repair ◽  
Csf Rhinorrhea ◽  
Post Traumatic

: Skull base fractures are a major cause of morbidity and mortality in head injury. Anterior cranial Fossa (ACF) skull base fracture, leading to Cerebro Spinal Fluid (CSF) Rhinorrhea is one of the most commonly encountered presentation in ACF base fractures. The key to successful management of such cases lies in early diagnosis and surgical management before it leads to meningitis and avoidable mortality.To evaluate the cases of post traumatic CSF rhinorrhea and analyze the parameters utilized to guide the management strategies. An attempt was made to come up with guidelines for its management in a tertiary care hospital.This was a retrospective study in which all cases of traumatic CSF Rhinorrhea admitted to Tertiary care hospital were included. Patients were divided into three groups. First group was conservatively managed in which the rhinorrhea and serial imaging findings showed favourable response.In thesecond group patients were subjected to endoscopic repair by the ENT surgeon based on anatomical considerations. The third group included patients who were had failed the trial of conservative management and the site of leak did not favor endoscopic repair.The outcomes in all these groups were analyzed and conclusions drawn.A total of 54 patients were included in the study which was conducted between Jan 2014 to 2020. 24 were successfully managed conservatively,10 were managed with endoscopic repair and 20 were managed by bifrontal craniotomy and pedicled pericranial ACF Base repair. There was one case from the first group who developed CSF leak after one month necessitating ACF base repair. There was no recurrence reportedin the cases managed endoscopically, whereas one case subjected to craniotomy had recurrence requiring lumbar drain placement. With each transcranial surgery there was a refinement in the technique further minimizing complications. We have elaborated on the surgical nuances to ensurebetter outcomes. : Pedicledpericranial flap ACF base repair is an elegant approach which requires an understanding of the mechanism of CSF leak from skull base fractures. This procedure can easily be mastered and when performed correctly provides best results for cases where there are multiple ACF defects, those not accessible by endoscope and also in those cases where imaging is not able to localize the exact site of defect leading to CSF rhinorrhea. Anosmia is an in evitable complication of this procedure. However, the trade off between mortality resulting from meningitis versus anosmia makes it a viable and attractive treatment option.

Various modifications of a vascularized nasoseptal flap for repair of extensive skull base dural defects

2020 ◽  
Vol 132 (2) ◽  
pp. 371-379 ◽  
Author(s):  
Ju Hyung Moon ◽  
Eui Hyun Kim ◽  
Sun Ho Kim
Keyword(s):  
Skull Base ◽  
Inferior Turbinate ◽  
Lateral Nasal Wall ◽  
Dural Defect ◽  
Nasoseptal Flap ◽  
Endonasal Surgery ◽  
Csf Rhinorrhea ◽  
Nasal Floor ◽  
Dural Defects ◽  
Skull Base Defects

OBJECTIVEEndonasal surgery of the skull base requires watertight reconstruction of the skull base that can seal the dural defect to prevent postoperative CSF rhinorrhea and consequent intracranial complications. Although the incidence of CSF leakage has decreased significantly since the introduction in 2006 of the vascularized nasoseptal flap (the Hadad-Bassagasteguy flap), reconstruction of extensive skull base dural defects remains challenging. The authors describe a new, modified vascularized nasoseptal flap for reconstruction of extensive skull base dural defects.METHODSA retrospective review was conducted on 39 cases from 2010 to 2017 that involved reconstruction of the skull base with an endonasal vascularized flap. Extended nasoseptal flaps were generated by adding the nasal floor and inferior meatus mucosa, inferior turbinate mucosa, or entire lateral nasal wall mucosa. The authors specifically highlight the surgical techniques for flap design and harvesting of these various modifications of the vascularized nasoseptal flap.RESULTSThirty-nine endonasal vascularized flaps were used to reconstruct skull base defects in 37 patients with nonsurgical or postoperative CSF rhinorrhea. Of the 39 procedures, extended nasoseptal flaps were used in 5 cases (13%). These included 2 extended nasoseptal flaps including the inferior turbinate mucosa and 3 extended nasoseptal flaps including the entire lateral nasal wall mucosa. These 5 extended nasoseptal flaps were used in patients who had nonsurgical CSF rhinorrhea due to extensive skull base destruction by invasive pituitary tumors. All flaps healed completely and sealed off the CSF leaks. Olfactory function slightly decreased in the 3 patients with extended nasoseptal flaps including the entire lateral nasal wall mucosa. One patient experienced nasolacrimal duct obstruction, which was treated by dacryocystorhinostomy. The authors encountered no wound complication in this series, while crusting at the donor site required daily nasal toilette and frequent debridement until the completion of mucosalization, which usually takes 8 to 12 weeks after surgery.CONCLUSIONSExtended nasoseptal flaps are a reliable and versatile option that can be used to reconstruct extensive skull base dural defects resulting from destruction by large invasive tumors or complex endoscopic endonasal surgery. An extended nasoseptal flap that includes the entire lateral nasal wall mucosa (360° flap) is the largest endonasal vascularized flap reported to date and may be an alternative for the reconstruction of extensive skull base defects while avoiding the need for additional external approaches.

Nasoseptal Flap Reconstruction of High Flow Intraoperative Cerebral Spinal Fluid Leaks during Endoscopic Skull Base Surgery

2009 ◽  
Vol 23 (5) ◽  
pp. 518-521 ◽  
Author(s):  
Adam M. Zanation ◽  
Ricardo L. Carrau ◽  
Carl H. Snyderman ◽  
Anand V. Germanwala ◽  
Paul A. Gardner ◽  
...  
Keyword(s):  
Risk Factors ◽  
Radiation Therapy ◽  
Skull Base ◽  
Cerebral Spinal Fluid ◽  
High Flow ◽  
Spinal Fluid ◽  
Csf Leak ◽  
Flap Reconstruction ◽  
Nasoseptal Flap ◽  
Reconstructive Technique

Background Over the past 10 years, significant anatomic, technical, and instrumentation advances have facilitated the exposure and resection of intradural lesions via a fully endoscopic expanded endonasal approach (EEA). The vascularized nasoseptal flap (based on the posterior nasoseptal artery) has become our primary endoscopic reconstructive technique. The goals of this study are to prospectively evaluate the nasoseptal flap and high-risk cerebral spinal fluid (CSF) leak variables. Methods Prospective evaluation was performed of EEA patients with intraoperative high-flow leaks (either a cistern or ventricle open to nasal cavity during tumor dissection) who underwent nasoseptal flap reconstruction. Results Seventy consecutive nasoseptal flaps for high-flow intraoperative leaks were evaluated prospectively by the primary author. Twelve risk factors were then graded at the time of the operations and correlated to CSF leak outcomes. The overall postoperative CSF leak rate was 5.7% (4/70). All four postoperative leaks were successfully managed with endoscopic repair and CSF diversion. A multivariate analysis of all 12 risk factors is detailed. Pediatric patients, large dural defects, and radiation therapy were noted to be factors in reconstructive failure. One flap death occurred in a patient with prior surgery and proton therapy, this leak was managed with a temporoparietal flap and endonasal repair. Conclusion The nasoseptal flap is an excellent anterior skull base reconstructive technique. Patients with high-flow intraoperative CSF leaks had a 94% successful reconstruction rate. Patients with skull base proton radiation therapy are at higher risk for flap failure and preparation for nonradiated tissue reconstruction should be discussed with the patient.

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