Emergency endovascular treatment of cavernous internal carotid artery acute bleeding with flow diverter stent: a single-center experience

Endovascular Pipeline Shield Treatment of Iatrogenic Internal Carotid Artery Pseudoaneurysm and Carotid-Cavernous Fistula

Pseudoaneurysm (PA) and carotid cavernous fistula (CCF) of the internal carotid artery (ICA) is an uncommon complication of endoscopic endonasal surgery that occurs in 1% of cases. We report on the successful placement of flow-diverting stents (FDS) to ICA pseudoaneurysm and caroticocavernous fistula caused by iatrogenic ICA injury for a pituitary adenoma in a 37-year-old female. After placement of the pipeline shield given a certain time, dual antiplatelet agents (DAPT) and follow-up angiogram verified complete aneurysm obliteration and effective endoluminal reconstruction of the injured vessel. In managing ICA pseudoaneurysms, the placement of flow-diverting stents is a viable vessel-sparing technique.

Pedicled nasal flaps in transnasal endoscopic surgery: review of indications and surgical techniques

At present an exclusive endoscopic endonasal approach is sufficient in the majority of cases to treat pathologies involving the sinonasal compartment and the surrounding anatomical subsites (e.g. orbit, ventral skull base, upper parapharyngeal space, etc.) with the advantage of minimising surgical invasiveness. In this context, nasal vascularised local flaps are widely employed because they represent a more effective option for reconstruction or preservation of noble/vital structures compared to grafts. On the other hand, the surgical extension and morbidity are minimised compared to regional or free flaps. Several nasal local flaps have been described in the literature: the aim of this review is to examine their applications, characteristics, indications, success rates and morbidities. Different nasal flaps based on single or multiple pedicles have been described; the choice between them is based on different factors such as the flap’s shape and dimension, localisation of the pedicle’s origin, width of rotation angle, previous surgeries which could compromise vascularisation, and surgical experience, in addition to the position and dimension of the area which must be resurfaced.

Advances in Imaging Modalities for Pediatric Brain and Spinal Cord Tumors

BACKGROUND

Neuroimaging has evolved from anatomical imaging toward a multi-modality comprehensive anatomical and functional imaging in the past decades, important functional data like perfusion-weighted imaging, permeability imaging, diffusion-weighted imaging (DWI), and diffusion tensor imaging (DTI), tractography, metabolic imaging, connectomics, event-related functional imaging, resting state functional imaging, and much more is now being offered.

SUMMARY

Precision diagnostics has proven to be essential for precision treatment. Many minimal invasive techniques have been developed, taking advantage of digital subtraction angiography and interventional neuroradiology. Furthermore, intraoperative CT and/or MRI and more recently MR-guided focused ultrasound have complemented the diagnostic and therapeutic armamentarium.

KEY MESSAGES

In the current manuscript, we discuss standard imaging sequences including advanced techniques like DWI, DTI, susceptibility-weighted imaging, and 1H magnetic resonance spectroscopy, various perfusion weighted imaging approaches including arterial spin labeling, dynamic contrast enhanced imaging, and dynamic susceptibility contrast imaging. Pre-, intra, and postoperative surgical imaging including visualize imaging will be discussed. The value of connectomics will be presented for its value in neuro-oncology. Minimal invasive therapeutic possibilities of interventional neuroradiology and image-guided laser ablation and MR-guided high-intensity-focused ultrasound will be presented for treatment of pediatric brain and spinal cord tumors. Finally, a comprehensive review of spinal cord tumors and matching neuropathology has been included.

Flow diversion for acutely ruptured intracranial aneurysms treatment: A retrospective study and literature review

OBJECTIVE

Flow diversion is becoming an increasingly established practice for the treatment of acutely ruptured intracranial aneurysms. In this study the authors present a literature review and meta-analysis, adding a retrospective review of institutional registry on emergency treatment of aRIA with flow diverter stent.

MATERIALS AND METHODS

A systematic search of PubMed, SCOPUS, Ovid MEDLINE, and Ovid EMBASE was performed on April 20^th, 2021, extrapolating 35 articles. R language 'meta' and 'metafor' packages were used for data pooling. The DerSimonian-Laird model was used to calculate the pooled effect. The I² value and Q statistic evaluated study heterogeneity. Additionally, the authors retrospectively reviewed their institutional database for the treatment and outcomes of all patients with acutely ruptured intracranial aneurysms treated with flow diverter stent placement from May 2010 to November 2020 was performed.

RESULTS

From the systematic literature review and meta-analysis, the pooled proportion of complete aneurysm occlusion was 78%, with a pooled rate of 79%, 71%, 80%, and 50% for dissecting, saccular, fusiform, and mycotic aneurysms, respectively. The pooled proportion of aneurysm rebleeding and intrastent stenosis was 12% and 15% respectively, for a total of 27% rate. The analysis of authors retrospective register showed an overall mortality rate of 16.7% (3/18), with a low but not negligible postprocedural rebleeding and intrastent thrombosis rates (5.6% and 11.1% respectively).

CONCLUSION

Although increasingly utilized in the management of selected patients with acutely ruptured intracranial aneurysms, flow diversion for acutely ruptured intracranial aneurysms treatment presents rebleeding and intrastent stenosis rates not negligible.

When is a multidisciplinary surgical approach required in sinonasal tumours with cranial involvement?

The term “sinonasal tumours” includes a large spectrum of diseases, which are characterized by heterogeneous biological behavior and prognosis, and located in a critical anatomic area. Diagnosis and treatment of sinonasal tumours require the contribution of different disciplines. A narrative review was performed to highlight the role of surgeons in contributing to a multidisciplinary approach to sinonasal tumours. Diagnosis and staging of sinonasal tumours is challenging and requires collaboration between surgeons, radiologists, and pathologists. The identification and management of critical extensions (orbital or intracranial encroachment, vascular abutment or encasement) is fundamental for successful treatment. Most cases of advanced sinonasal tumours can undergo surgical intervention by an adequately trained otorhinolaryngological team. The contribution of neurosurgeons and oculoplastic surgeons is required in selected scenarios. In rare circumstances, multidisciplinary reconstructive strategies can be indicated for complex tissue defects. Furthermore, a multidisciplinary approach is pivotal in the management of perioperative complications. While surgery remains the mainstay of treatment, the role of non-surgical adjuvant or even exclusive treatments is constantly expanding.