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Δευτέρα 30 Νοεμβρίου 2020

Restitution of the NHS breast reconstruction service during the recovery phase of the Covid 19 pandemic.

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Restitution of the NHS breast reconstruction service during the recovery phase of the Covid 19 pandemic.

J Plast Reconstr Aesthet Surg. 2020 Nov 06;:

Authors: Vigneswaran P, Clancy R, Jackson PC, Wilson SM, Patel N

Abstract
During the recovery restitution phase of the coronavirus pandemic, breast reconstruction teams have faced particular challenges to restarting this essential service. This is due to the length and complexity of the surgery, along with the demands on healthcare staff. The Royal College of Surgeons have classified immediate breast reconstruction as priority 2 and the National Institute for Health and Care Excellence have provided a pre-operative pathway for resumption of elective procedures. We therefore describe our experience in restarting our service for providing a breast reconstruction service from the 29th June 2020.

PMID: 33221182 [PubMed - as supplied by publisher]

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Alveolar Rhabdomyosarcoma of the Larynx in a Young Child.

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First Description of Alveolar Rhabdomyosarcoma of the Larynx in a Young Child.

Ear Nose Throat J. 2020 Nov 25;:145561320973771

Authors: Quéré J, Leclere JC, Prévot J, Conan V, Marianowski R

Abstract
Rhabdomyosarcoma of the larynx has been very rarely described in pediatric population. There are 3 histological subtypes: embryonal, pleomorphic, and alveolar. With regard to the English literature, we present the first case of alveolar rhabdomyosarcoma of the larynx ever described in a child. This tumor has been diagnosed on an endoscopic biopsy. Thus, a unilateral arytenoidectomy has been performed. This tumor has a poor prognosis. Lymph node metastases were successfully treated by chemotherapy and radiotherapy. Surgery has shifted from radical to conservative combined with adjuvant treatments.

PMID: 33236919 [PubMed - as supplied by publisher]

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Granulomatous Inflammation Causing Severe Supraglottic Edema and Airway Obstruction in a Pediatric Patient.

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Granulomatous Inflammation Causing Severe Supraglottic Edema and Airway Obstruction in a Pediatric Patient.

Ear Nose Throat J. 2020 Nov 25;:145561320973772

Authors: Colevas SM, Gietman BT, Cook SM, Kille TL

Abstract
A 12-year-old male with a family history of inflammatory bowel disease presented with sleep-disordered breathing and was found to have chronic, granulomatous swelling of the supraglottic larynx. His airway was managed with tracheostomy, regular interval laryngeal steroid injections, supraglottoplasty, and "pepper pot" CO2 laser resurfacing leading to eventual decannulation. Due to the non-necrotic nature of the granulomatous inflammation, as well as the patient's family history of inflammatory bowel disease, the leading diagnosis was Crohn disease, but isolated laryngeal sarcoidosis could not be ruled out. There are only 13 reported cases of laryngeal manifestations of Crohn disease in the literature, with only 2 cases occurring in pediatric patients. This case report adds to this body of literature and discusses strategies for managing granulomatous supraglottic edema when definitive diagnosis is not fully clear.

PMID: 33236923 [PubMed - as supplied by publisher]

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Isolated Incudostapedial Cholesteatomas: Unique Radiologic and Surgical Features.

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Isolated Incudostapedial Cholesteatomas: Unique Radiologic and Surgical Features.

Ear Nose Throat J. 2020 Nov 25;:145561320973785

Authors: MacDonald B, Bommakanti K, Mallo M, Carvalho D

Abstract
OBJECTIVES: Congenital cholesteatomas originate from epithelial tissue present within the middle ear in patients with an intact tympanic membrane, no history of otologic surgery, otorrhea, or tympanic membrane perforation. They are diagnosed by a pearl-like lesion on otoscopy and computed tomography (CT) scan showing an expansile soft-tissue mass. We describe a series of patients with no prior otologic history presenting with progressive unilateral conductive hearing loss and normal otoscopy. The CT scans showed ossicular erosion without obvious soft-tissue mass. Surgery confirmed incudostapedial erosion found to be cholesteatoma. In this study, we characterize the clinical course of patients diagnosed with isolated incudostapedial cholesteatoma (IIC) and review possible pathologic mechanisms.
METHODS: Retrospective review of IIC cases treated by the Department of Pediatric Otolaryngology, Rady Children's Hospital, San Diego, 2014 to 2020. Data included patient demographics, clinical features, imaging, surgical findings, and audiologic data.
RESULTS: Five patients were diagnosed with IIC (3 [60%] female; mean age at presentation 10.7 years [range 5.5-16.0]). All patients presented with postlingual unilateral conductive hearing loss and normal otoscopy without any past otologic history; delay in diagnosis ranged from 4 months to several years. The CT scans showed ossicular chain erosion with an absent long process of the incus and/or stapes superstructure. All patients underwent middle ear exploration, revealing a thin layer of cholesteatoma in the incudostapedial region, confirmed by histopathology. Mean preoperative speech reception threshold was 55 dB and improved to a mean of 31 dB in the 4 patients who underwent ossicular chain reconstruction.
CONCLUSION: Isolated incudostapedial cholesteatoma should be included as a possible etiology in pediatric patients with insidious onset of unilateral conductive hearing loss with normal otoscopy, unremarkable otologic history, and a CT scan showing ossicular abnormality/disruption without notable middle ear mass. These patients should be counseled preoperatively regarding the possibility of cholesteatoma and should undergo middle ear exploration with possible ossiculoplasty.

PMID: 33237827 [PubMed - as supplied by publisher]

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An unperceived acoustic stimulus decreases reaction time to visual information in a patient with cortical deafness.

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An unperceived acoustic stimulus decreases reaction time to visual information in a patient with cortical deafness.

Sci Rep. 2020 04 02;10(1):5825

Authors: Carlsen AN, Maslovat D, Kaga K

Abstract
Responding to multiple stimuli of different modalities has been shown to reduce reaction time (RT), yet many different processes can potentially contribute to multisensory response enhancement. To investigate the neural circuits involved in voluntary response initiation, an acoustic stimulus of varying intensities (80, 105, or 120 dB) was presented during a visual RT task to a patient with profound bilateral cortical deafness and an intact auditory brainstem response. Despite being unable to consciously perceive sound, RT was reliably shortened (~100 ms) on trials where the unperceived acoustic stimulus was presented, confirming the presence of multisensory response enhancement. Although the exact locus of this enhancement is unclear, these results cannot be attributed to involvement of the auditory cortex. Thus, these data provide new and compelling evidence that activation from subcortical auditory processing circuits can contribute to other cortical or subcortical area s responsible for the initiation of a response, without the need for conscious perception.

PMID: 32242039 [PubMed - indexed for MEDLINE]

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Single‐cell transcriptomic analysis of small and large wounds reveals the distinct spatial organization of regenerative fibroblasts

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Abstract

Wound induced Hair Follicle Neogenesis (WIHN) has been an important model to study hair follicle regeneration during wound repair. However, the cellular and molecular components of the dermis that make large wounds more regenerative are not fully understood. Here, we compare and contrast recently published scRNA‐seq data of small scarring wounds to wounds that regenerate in hope to elucidate the role of fibroblasts lineages in WIHN. Our analysis revealed an over‐representation of the newly identified upper wound fibroblasts in regenerative wound conditions, which express the retinoic acid binding protein Crabp1. This regenerative cell type shares a similar gene signature to the murine papillary fibroblast lineage, which are necessary to support hair follicle morphogenesis and homeostasis. RNA‐velocity analysis comparing scarring and regenerating wounds revealed the divergent trajectories toward upper and lower wound fibroblasts, and that the upper populations were closely as sociated to the specialized dermal papilla. We also provide analyses and explanation reconciling the inconsistency between the histological lineage tracing and the scRNA‐seq data from recent reports investigating large wounds. Finally, we performed a computational test to map the spatial location of upper wound fibroblasts in large wounds which revealed that upper peripheral fibroblasts might harbor equivalent regenerative competence as those in the center.. Overall, our scRNA‐seq reanalysis combining multiple samples suggests that upper wound fibroblasts are required for hair follicle regeneration and that papillary fibroblasts may migrate from the wound periphery to the center during wound re‐epithelialization. Moreover, data from this publication is made available on our searchable web‐resource: https://skinregeneration.org/ .

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Extended Anterolateral Infralabyrinthine Transjugular Approach for Microsurgical Resection of Giant Glomus Vagale Tumor: Operative Video and Technical Nuances

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J Neurol Surg B Skull Base
DOI: 10.1055/s-0040-1716532

Glomus vagale tumor is a paraganglioma of the vagus nerve. It is a rare type of benign tumor that occupies the head and neck and skull base regions. Patients often present with lower cranial nerve dysfunctions such as difficulty swallowing, tongue weakness, and hoarseness. Surgical treatment can be complex and difficult due to its high vascularity, frequent involvement of lower cranial nerves, and surrounding critical vascular structures. In this operative video, we demonstrate an extended anterolateral infralabyrinthine transjugular approach for microsurgical resection of a giant glomus vagale tumor in a 53-year-old male who presented with an enlarging neck mass, dif ficulty swallowing, right tongue weakness, and hoarseness. Imaging revealed a giant glomus vagale tumor in the right parapharyngeal space extending into the jugular foramen with occlusion of the internal jugular vein. After preoperative embolization, the patient underwent a near-total resection of the tumor with a small microscopic residual at the pars nervosa. In summary, the extended anterolateral infralabyrinthine transjugular approach is a useful strategy for removal of giant glomus vagale tumors extending into the skull base. The surgical technique and nuances are described in a step-by-step fashion in this illustrative operative video.The link to the video can be found at: https://youtu.be/L0EosQK95LE.
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Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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Revising the Indications of Transtemporal Surgical Approaches in the Modern Endoscopic Era of Skull Base Surgery: A Dying Art

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J Neurol Surg B Skull Base
DOI: 10.1055/s-0040-1718767

Objectives The aim of the study is to emphasize and explore the possible transtemporal approaches for spectrum of complicated lateral skull base pathologies. Design Retrospective analysis of complicated lateral skull base pathologies was managed in our institute between January 2017 and December 2019. Setting The study was conducted in a tertiary care referral center. Main Outcome Measures The study focused on the selection of approach based on site and extent of the pathology, the surgical nuances for each approach, and the associated complications. Results A total of 10 different pathologies of the lateral skull base were managed by different transtemporal approaches. The most common complication encountered was facial nerve palsy (43%, n = 6). Other complications included cerebrospinal fluid (CSF) collection (15%, n = 2), cosmetic deformity (24%, n = 4), petrous internal carotid artery injury (7%, n = 1), and hypoglossal nerve palsy (7%, n = 1). The cosmetic deformity included flap necrosis (n = 2) and postoperative bony defects leading to contour defects of the scalp (n = 2). Conclusion Surgical approach should be tailored based on the individual basis, to obtain adequate exposure and complete excision. Selection of appropriate surgical approach should also be based on the training and preference of the operating surgeon. Whenever necessary, combined surgical approaches facilitating full tumor exposure are recommended so that complete tumor excision is feasible. This requires a multidisciplinary team comprising neurosurgeons, neuro-otologist, neuroanesthetist, and plastic surgeons. The surgeon must know precise microsurgical anatomy to preserve the adjacent nerves and vessels, which is necessary for better surgical outcomes.
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Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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Far Lateral Approach for Disconnection of Craniocervical Junction Dural Arteriovenous Fistula Presented with Myelopathy and Hydrocephalus

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J Neurol Surg B Skull Base
DOI: 10.1055/s-0040-1714402

We report a case of craniocervical junction dural arteriovenous fistula (dAVF) presented with myelopathy and normal pressure hydrocephalus, and was treated with hybrid approach of embolization and surgical disconnection. A 68-year-old gentleman presented with 1 year history of unsteady gait and sphincter disturbance. Magnetic resonance imaging (MRI) showed abnormally enlarged and tortuous vessels over right cerebellomedullary cistern. Digital subtraction angiogram (DSA) showed Cognard's type-V dAVF at craniocervical junction. Catheter embolization was performed via external carotid artery and finally surgical disconnection was done with far lateral approach (Fig. 1). Postoperative DSA showed no more arteriovenous shunting (Fig. 2). Clinically the patient improved after a course of rehabilitation. Dural AVF at craniocervical junction is rare and its clinical presentation can be highly variable from subarachnoid hemorrhage to brainstem dysfunction. Identification of the exact fistula site is essential in surgical planning. Surgery is effective and safe to achieve complete obliteration and good clinical outcome.1 2 3 4 5 6 The link to the video can be found at: https://youtu.be/xI48stSlWpY.
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Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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Managing the Anomalous Vertebral Artery in C1–C2 Stabilization for Congenital Atlantoaxial Instability

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J Neurol Surg B Skull Base
DOI: 10.1055/s-0040-1714404

Objectives This study aimed to demonstrate the technique of handling the anomalous vertebral artery in congenital atlantoaxial instability. The vertebral artery course can be variable in congenital atlantoaxial instability, especially if there is assimilation of atlas. The surgical technique to stabilize the atlantoaxial joint should ensure the patency and safety of the vertebral artery and prevents devastating stroke. Computed tomography (CT) angiography of the vertebral artery is mandatory in planning the surgical strategies. The vertebral artery can be injured during dissection of soft tissues between atlas and axis and can be compromised during distraction and instrumentation. The vertebral artery needs to be mobilized based on the tortuosity in the course during instrumentation and prevents compression of the artery against bony structures or screw heads. The vertebral artery has to be identified earlier in the course of dissection and should protect it. It is also i mperative to choose the surgical approach that can be performed under vision using operative microscope rather than adapting blind procedures like transarticular screw. Here, in our present case, we demonstrate the technique of mobilizing the vertebral artery which was coursing medially preventing the access for the instrumentation and perform stabilization of atlantoaxial joint using Goel–Harms technique, and prevent its compression after placement of screw by deroofing the bony ridges of axis (Figs. 1 and 2). We also emphasize the various technical nuances during the stabilization with distraction of joint space of atlas and axis.The link to the video can be found at: https://youtu.be/pgURpF_jACc.
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Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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Primary Repair of Posteriorly Located Anterior Skull Base Dural Defects Using Nonpenetrating Titanium Clips in Cranial Trauma

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J Neurol Surg B Skull Base
DOI: 10.1055/s-0040-1718765

Objective Primary repair of posteriorly located anterior skull base (ASB) dural defects following cranial trauma is made difficult by narrow operative corridors and adherent dura mater. Inadequate closure may result in continued cerebrospinal fluid (CSF) leak and infectious sequelae. Here, we report surgical outcomes following the use of nonpenetrating titanium microclips as an adjunctive repair technique in traumatic anterior skull base dural defects extending from the olfactory groove to the tuberculum sellae. Methods All trauma patients who underwent a bifrontal craniotomy from January 2013 to October 2019 were retrospectively reviewed. Patients with ASB defects located at posterior to the olfactory groove were analyzed. Patients with isolated frontal sinus fractures were excluded. All patients presented with CSF leak or radiographic signs of dural compromise. Patients were divided according to posterior extent of injury. Patient characteristics, imaging, surgical technique, and outcomes are reported. Results A total of 19 patients who underwent a bifrontal craniotomy for repair of posteriorly located ASB dural defects using nonpenetrating titanium microclips were included. Defects were divided by location: olfactory groove (10/19), planum sphenoidale (6/19), and tuberculum sellae (3/19). No patients demonstrated a postoperative CSF leak. No complications related to the microclip technique was observed. Clip artifact did not compromise postoperative imaging interpretation. Conclusion Primary repair of posteriorly located ASB dural defects is challenging due to narrow working angles and thin dura mater. Use of nonpenetrating titanium microclips for primary repair of posteriorly located dural defects is a reasonable adjunctive repair technique and was associated with no postoperative CSF leaks in this cohort.
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Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, Germany

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