Delayed cyst formation after radiosurgery for arteriovenous malformation: A case report and critical review.

Background: Stereotactic radiosurgery (SRS) is a validated treatment option for cerebral arteriovenous malformations (AVMs), even if a greater knowledge of its potential delayed complications is still being acquired.

Case Description: A 49-year-old man suffered multiple episodes of cerebral hemorrhage in an approximate 10-year follow-up interval in the context of a left central core AVM with deep venous drainage into the internal cerebral veins (Spetzler Martin Grade 4) despite being treated with gamma knife radiosurgery at two separate timepoints, and with an almost complete obliteration confirmed. Approximately 10 years after the first radiosurgery treatment, he developed severe motor aphasia, Grade 3 right hemiparesis, progressive confusion, and memory deficits.

Cerebral Venous Thrombosis in Patients With Traumatic Brain Injury: Epidemiology and Outcome.

The natural history and epidemiological aspects of traumatic cerebral venous thrombosis (CVT) are not fully understood. Due to the concomitant occurrence with intracranial hemorrhages, guidelines for medical treatment have been highly controversial. In this study, our objective was to carry out an analysis description of the population and to conduct a literature review.

The impact of selection bias in the treatment for ruptured anterior communicating artery aneurysms: different results or different patients?

Background: Anterior communicating artery is one of the most frequent locations for the development of intracranial aneurysm. The availability and advances of different treatments modalities allows for case-specific selection, but potentially impacts our ability to assess equipoise among them.

Objective: Investigate and compare clinical and morphological variables among surgical and endovascular treatment groups with ruptured anterior communicating artery aneurysms.

Building an alliance to map global supply networks.

New firm-level data can inform policy-making.

Relationship between fatty infiltration of paraspinal muscles and clinical outcome after lumbar discectomy.

Introduction: Cross sectional area (CSA) and fat infiltration (FI) are important parameters to assess paravertebral muscle atrophy. However, the relationship of muscular fat infiltration in patients with symptomatic lumbar disc herniation undergoing surgery remains unclear.

Research Question: Does lumbar paravertebral muscle atrophy have prognostic value regarding the clinical outcome for patients with symptomatic lumbar disc herniation undergoing surgery?

Methods: Patients over 18 years of age with lumbar disc herniation and radicular pain who underwent single-level discectomy were included.

Giant Vertebrobasilar Aneurysm: The Rule of Decompressive Craniectomy Previous to Endovascular Treatment.

Giant vertebral-basilar aneurysms are rare and represent 1% of intracranial aneurysms. Natural history and treatment are associated with severe clinical manifestations, such as ischemia, mass effect, hydrocephalus, and subarachnoid hemorrhage, leading to high mortality and morbidity. In this case, a 51-year-old male with no relevant medical history presented to the emergency department with severe pulsatile right temporo-occipital headache, radiating to the territory of the maxillary branch of the trigeminal nerve.

How production networks amplify economic growth.

Technological improvement is the most important cause of long-term economic growth. In standard growth models, technology is treated in the aggregate, but an economy can also be viewed as a network in which producers buy goods, convert them to new goods, and sell the production to households or other producers. We develop predictions for how this network amplifies the effects of technological improvements as they propagate along chains of production, showing that longer production chains for an industry bias it toward faster price reduction and that longer production chains for a country bias it toward faster growth.

Selection bias in patients proposed for neurosurgical versus endovascular treatment of aneurysms of the posterior communicating artery.

Background: Microsurgical clipping and endovascular coiling are viable treatment options for posterior communicating artery (PComA) aneurysms, but there are still major limitations to evidence-based decisions regarding standard-of-care treatment. In this study, we aimed at assessing potential selection biases that may influence our ability to extract conclusions about the comparative effectiveness or efficacy of the aneurysm treatment.

Objective: To study the patient/aneurysm characteristics as possible biases in the option for endovascular or neurosurgical treatment of PComA aneurysms.

Tracking the COVID-19 crisis with high-resolution transaction data.

Payments systems generate vast amounts of naturally occurring transaction data rarely used for constructing official statistics. We consider billions of transactions from card data from a large bank, Banco Bilbao Vizcaya Argentaria, as an alternative source of information for measuring consumption. We show, via validation against official consumption measures, that transaction data complements national accounts and consumption surveys.

Major Cardiac Events After Non-cardiac Surgery.

Introduction: Postoperative cardiovascular complications might be difficult to assess and are known to be associated with longer hospital stay and increased costs as well as higher morbidity and mortality rates. The aim of this study was to evaluate the predictors for major cardiac events (MCE) after non-cardiac surgery.

Methods: The study included 4398 patients who were admitted to the Surgical Intensive Care Unit between January 1, 2006 and July 19, 2013.

The cultural divide: exponential growth in classical 2D and metabolic equilibrium in 3D environments.

Introduction: Cellular metabolism can be considered to have two extremes: one is characterized by exponential growth (in 2D cultures) and the other by a dynamic equilibrium (in 3D cultures). We have analyzed the proteome and cellular architecture at these two extremes and found that they are dramatically different.

Results: Structurally, actin organization is changed, microtubules are increased and keratins 8 and 18 decreased.

Statistical analysis of teeth autotransplantation in Portugal's region of Chaves.

Aim: The aim of this study was to evaluate the success rate of 33 transplanted teeth in a northern population of Portugal.

Methods: The mean follow-up period was 7 years, ranging from 6 months to 20 years.

Results: Six teeth (18%) were rated as unsuccessful, 52% of the donor teeth were transplanted to receptor alveolus after immediate exodontia and 24% were transplanted to receptor alveolus surgically prepared.

The influence of customized abutments and custom metal abutments on the presence of the interproximal papilla at implants inserted in single-unit gaps: a 1-year prospective clinical study.

Objectives: To assess and compare the papilla presence mesially and distally to dental implants restored with customized abutments and custom metal abutments in the anterior maxilla.

Material And Methods: Thirty-eight patients receiving 38 single-tooth implants, restored with 26 customized abutments and 12 custom metal abutments in the anterior maxillary region were enrolled in this study. The cases where did not existed contact point were excluded.

[Conservative aortic valve surgery].

Conservative aortic valve surgery is an attractive approach for the correction of the aortic insufficiency and the dilation of the aortic root. Despite being a surgery made in a minority of the patients it's receiving increased attention in the last decade because it can minimize the complications and risks that are inherent to the use of a mechanic or biologic valve. In the following article we propose ourselves to review the actual state of knowledge regarding conservative aortic valve surgery and the path that this type of surgical procedure must have in order to become the gold standard approach for the surgical correction of the aortic insufficiency or dilation of aortic root.

Clinical Outcome of Inter-Proximal Papilla between a Tooth and a Single Implant Treated with CAD/CAM Abutments: a Cross-Sectional Study.

Objectives: The aim of this study was to assess the clinical outcomes achieved with Computer-Assisted Design/Computer-Assisted Manufacturing implant abutments in the anterior maxilla.

Material And Methods: Nineteen patients with a mean age of 41 (range form 26 to 63) years, treated with 21 single tooth implants and 21 Computer-Assisted Design/Computer-Assisted Manufacturing (CAD/CAM) abutments in the anterior maxillary region were included in this study. The patients followed 4 criteria of inclusion: (1) had a single-tooth implant in the anterior maxilla, (2) had a CAD/CAM abutment, (3) had a contralateral natural tooth, (4) the implant was restored and in function for at least 6 months up to 2 years.