Fluorescein-guided surgery for intradural spinal tumors: A single-center experience

•Gross total removal has a pivotal role in surgical treatment of intradural spinal tumors.•Sodium fluorescein prevents vascular injuries also preserving pial vessels in posterior myelotomy.•Fluorescence before the durotomy helps to distinguishing tumor from healthy tissue in intradural lesions.•Intraoperative fluorescence is safe and effective, also preserving functional anatomy in tumor removal

3D-Printing of Arteriovenous Malformations for Radiosurgical Treatment: Pushing Anatomy Understanding to Real Boundaries

open9noRadiosurgery of arteriovenous malformations (AVMs) is a challenging procedure. Accuracy of target volume contouring is one major issue to achieve AVM obliteration while avoiding disastrous complications due to suboptimal treatment. We describe a technique to improve the understanding of the complex AVM angioarchitecture by 3D prototyping of individual lesions. Arteriovenous malformations of ten patients were prototyped by 3D printing using 3D rotational angiography (3DRA) as a template. A target volume was obtained using the 3DRA; a second volume was obtained, without awareness of the first volume, using 3DRA and the 3D-printed model. The two volumes were superimposed and the conjoint and disjoint volumes were measured. We also calculated the time needed to perform contouring and assessed the confidence of the surgeons in the definition of the target volumes using a six-point scale. The time required for the contouring of the target lesion was shorter when the surgeons used the 3D-printed model of the AVM (p=0.001). The average volume contoured without the 3D model was 5.6 ± 3 mL whereas it was 5.2 ± 2.9 mL with the 3D-printed model (p=0.003). The 3D prototypes proved to be spatially reliable. Surgeons were absolutely confident or very confident in all cases that the volume contoured using the 3D-printed model was plausible and corresponded to the real boundaries of the lesion. The total cost for each case was 50 euros whereas the cost of the 3D printer was 1600 euros. 3D prototyping of AVMs is a simple, affordable, and spatially reliable procedure that can be beneficial for radiosurgery treatment planning. According to our preliminary data, individual prototyping of the brain circulation provides an intuitive comprehension of the 3D anatomy of the lesion that can be rapidly and reliably translated into the target volume.openCONTI, Alfredo; PONTORIERO, ANTONIO; IATI', GIUSEPPE; MARINO, DANIELE; LA TORRE, Domenico; VINCI, Sergio Lucio; GERMANO', Antonino Francesco; PERGOLIZZI, Stefano; TOMASELLO, FrancescoCONTI, Alfredo; PONTORIERO, ANTONIO; IATI', GIUSEPPE; MARINO, DANIELE; LA TORRE, Domenico; VINCI, Sergio Lucio; GERMANO', Antonino Francesco; PERGOLIZZI, Stefano; TOMASELLO, Francesc

Psychological symptoms and Quality of Life in adults with Chiari malformation type I: an Assessment by the Italian version of Chiari Symptom Profile

Chiari malformation type I (CM-I) is a rare condition with physical and neurological manifestation changing across people. Being a chronic and debilitating disease, a comprehensive multidisciplinary approach is needed for evaluating patient’s experienced Quality of Life (QoL) and psychological correlates of CM. Objectives: The aim of this study was to develop the Italian adaptation of Chiari Symptom Profile (CSP), a questionnaire assessing the core symptoms of Chiari malformation and their impact on people’s lives. Secondly, the occurrence of anxiety/depression symptoms and associations with patient-reported QoL were explored. Methods: 172 adults with diagnosed CM-I (N=79 with neurosurgery) completed an online questionnaire measuring general QoL (WHOQOL-brief), disease-related QoL (CSP), and symptoms of anxiety/depression (HADS). Participant’s demographic and clinical data were also collected. Results: The Italian version of CSP showed excellent reliability both in total (Cronbach alpha = .97) and factorial scores (alphas from .87 to .95) assessing four domains of Chiari-related QoL (functional, physical, social, and psychological). For construct validity, significant correlations (p .001) resulted among severity of CM symptoms, social and daily limitations assessed by CSP and general QoL. Participants’ age at neurosurgery and condition (with/without neurosurgery treatment) did not significantly impact QoL scores, but perceived QoL worsened with increasing age. Among participants, 32% reported clinical anxiety and 14% depression symptoms (with higher incidence of depression in non-operated participants). Participants with clinical anxiety/depression reported a worse QoL in all domains of CSP (functional, physical, social, and psychological). Conclusion: Findings suggest the need to include in CM treatment a continuous psychological support, identifying the patients most at risk who, in time, they may experience greater psychological suffering

Surgical management of Glioma Grade 4: technical update from the neuro-oncology section of the Italian Society of Neurosurgery (SINch®): a systematic review

Purpose: The extent of resection (EOR) is an independent prognostic factor for overall survival (OS) in adult patients with Glioma Grade 4 (GG4). The aim of the neuro-oncology section of the Italian Society of Neurosurgery (SINch®) was to provide a general overview of the current trends and technical tools to reach this goal. Methods: A systematic review was performed. The results were divided and ordered, by an expert team of surgeons, to assess the Class of Evidence (CE) and Strength of Recommendation (SR) of perioperative drugs management, imaging, surgery, intraoperative imaging, estimation of EOR, surgery at tumor progression and surgery in elderly patients. Results: A total of 352 studies were identified, including 299 retrospective studies and 53 reviews/meta-analysis. The use of Dexamethasone and the avoidance of prophylaxis with anti-seizure medications reached a CE I and SR A. A preoperative imaging standard protocol was defined with CE II and SR B and usefulness of an early postoperative MRI, with CE II and SR B. The EOR was defined the strongest independent risk factor for both OS and tumor recurrence with CE II and SR B. For intraoperative imaging only the use of 5-ALA reached a CE II and SR B. The estimation of EOR was established to be fundamental in planning postoperative adjuvant treatments with CE II and SR B and the stereotactic image-guided brain biopsy to be the procedure of choice when an extensive surgical resection is not feasible (CE II and SR B). Conclusions: A growing number of evidences evidence support the role of maximal safe resection as primary OS predictor in GG4 patients. The ongoing development of intraoperative techniques for a precise real-time identification of peritumoral functional pathways enables surgeons to maximize EOR minimizing the post-operative morbidity

Petrosal Meningiomas: Factors Affecting Outcome and the Role of Intraoperative Multimodal Assistance to Microsurgery

Petrous meningiomas (PMs) represent a subset of posterior fossa tumors accounting for ∼8% of all intracranial meningiomas. Surgical treatment of PMs is challenging because of their relationships with vital neurovascular structures of the cerebellopontine angle. OBJECTIVE: To investigate independent pre- and intraoperative predictors of PM surgery outcome. METHODS: We reviewed the surgical and outcome data of patients who underwent microsurgical resection of PMs from 1997 to 2016. From 2007 onward, a multimodal intraoperative protocol consisting of intraoperative neuromonitoring (IONM), endoscopy, and indocyanine green (ICG) videoangiography was applied. Outcome variables included extent of resection, Karnofsky performance status (KPS), overall survival, and progression-free survival (PFS). RESULTS: A total of 54 patients were included. Independent predictors of gross total resection (GTR) included retromeatal location (P < .0175; odds ratio [OR] 4.05), absence of brainstem compression (P < .02; OR 3.55), and histological WHO grade I (P < .001; OR 3.47). Nongiant size (P < .012; OR 4.38), and WHO grade I (P < .0001; OR 7.7) were independent predictors of stable or improved KPS. The use of multimodal intraoperative tools to assist surgery independently predicted GTR (P < .002; OR 6.8) and good KPS (P < .018; OR 4.23). Nongiant size (P = .01) and WHO grade I (P = .002) were significantly associated with increased PFS. CONCLUSION: Notwithstanding the limitations of a retrospective study, our results suggest that support of microsurgery by a combination of IONM, endoscopy, and ICG videoangiography may improve patient outcome in PM surgery

Complications in Anterior Cranial Fossa Surgery

A variety of neurosurgical disorders affect the anterior cranial base and require an anterior cranial fossa approach. As neurosurgeons, we usually deal with the treatment of benign neoplasms, in particular meningiomas. Nonetheless, other common neurosurgical pathologies include traumatic injuries, craniofacial malformations (i.e., hypertelorism, craniosynostosis), cerebrospinal fluid (CSF) fistulas, and vascular lesions (i.e., arterio-venous fistulas). Although surgery of benign lesions of the anterior cranial fossa is a relatively common procedure, tumors like meningiomas can reach huge sizes and encase vital neurovascular structures, making surgery in the area a real challenge. Furthermore, the anterior cranial base is also involved by malignant tumors. With some notable exceptions (leukemia, lymphoma, myeloma, metastases), malignant neoplasms are treated surgically but require adjuvant radiation or chemotherapy. Malignant lesions are generally challenging lesions that require a multidisciplinary approach to achieve an en bloc resection with margins of uninvolved tissue after broad circumferential exposure whenever possible.1 Indications for surgical treatment of malignant tumors are influenced by the extent of the lesion taken together with clinical data, including age and performance. Surgical morbidity must be weighed against the anticipated natural course of the lesion and results of nonsurgical treatments, when applicable. Here we briefly describe the transcranial approaches to the anterior cranial fossa and discuss complications commonly encountered in anterior cranial fossa surgery and their avoidance

Surgery of language-eloquent tumors in patients not eligible for awake surgery: the impact of a protocol based on navigated transcranial magnetic stimulation on presurgical planning and language outcome, with evidence of tumor-induced intra-hemispheric plasticity

Awake surgery and intraoperative monitoring represent the gold standard for surgery of brain tumors located in the perisylvian region of the dominant hemisphere due to their ability to map and preserve the language network during surgery. Nevertheless, in some cases awake surgery is not feasible. This could increase the risk of postoperative language deficit. Navigated transcranial magnetic stimulation (nTMS) and nTMS-based DTI fiber tracking (DTI-FT) provide a preoperative mapping and reconstruction of the cortico-subcortical language network. This can be used to plan and guide the surgical strategy to preserve the language function. The objective if this study is to describe the impact of a non-invasive preoperative protocol for mapping the language network through the nTMS and nTMS-based DTI-FT in patients not eligible for awake surgery and thereby operated under general anesthesia for suspected language-eloquent brain tumors

Aggressive Pituitary Adenomas: The Dark Side of the Moon

Although pituitary adenomas are considered benign lesions, a small group may show clinically aggressive behavior, sometimes independently from the classic markers of aggressiveness, including the Ki67 labeling index or p53 expression