Monday, February 25, 2013

Estimating and communicating prognosis in advanced neurologic disease

Prognosis can no longer be relegated behind diagnosis and therapy in high-quality neurologic care. High-stakes decisions that patients (or their surrogates) make often rest upon perceptions and beliefs about prognosis, many of which are poorly informed. The new science of prognostication—the estimating and communication "what to expect"—is in its infancy and the evidence base to support "best practices" is lacking. We propose a framework for formulating a prediction and communicating "what to expect" with patients, families, and surrogates in the context of common neurologic illnesses. Because neurologic disease affects function as much as survival, we specifically address 2 important prognostic questions: "How long?" and "How well?" We provide a summary of prognostic information and highlight key points when tailoring a prognosis for common neurologic diseases. We discuss the challenges of managing prognostic uncertainty, balancing hope and realism, and ways to effectively engage surrogate decision-makers. We also describe what is known about the nocebo effects and the self-fulfilling prophecy when communicating prognoses. There is an urgent need to establish research and educational priorities to build a credible evidence base to support best practices, improve communication skills, and optimize decision-making. Confronting the challenges of prognosis is necessary to fulfill the promise of delivering high-quality, patient-centered care.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

Neuroanatomical target theory as a predictive model for radiation-induced cognitive decline

Objective:

In a retrospective review to assess neuroanatomical targets of radiation-induced cognitive decline, dose volume histogram (DVH) analyses of specific brain regions of interest (ROI) are correlated to neurocognitive performance in 57 primary brain tumor survivors.

Methods:

Neurocognitive assessment at baseline included Trail Making Tests A/B, a modified Rey-Osterreith Complex Figure, California or Hopkins Verbal Learning Test, Digit Span, and Controlled Oral Word Association. DVH analysis was performed for multiple neuroanatomical targets considered to be involved in cognition. The %v10 (percent of ROI receiving 10 Gy), %v40, and %v60 were calculated for each ROI. Factor analysis was used to estimate global cognition based on a summary of performance on individual cognitive tests. Stepwise regression was used to determine which dose volume predicted performance on global factors and individual neurocognitive tests for each ROI.

Results:

Regions that predicted global cognitive outcomes at doses <60 Gy included the corpus callosum, left frontal white matter, right temporal lobe, bilateral hippocampi, subventricular zone, and cerebellum. Regions of adult neurogenesis primarily predicted cognition at %v40 except for the right hippocampus which predicted at %v10. Regions that did not predict global cognitive outcomes at any dose include total brain volume, frontal pole, anterior cingulate, right frontal white matter, and the right precentral gyrus.

Conclusions:

Modeling of radiation-induced cognitive decline using neuroanatomical target theory appears to be feasible. A prospective trial is necessary to validate these data.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

Thursday, February 21, 2013

Stereotactic Radiosurgical Salvage Treatment for Locally Recurrent Esthesioneuroblastoma

imageBACKGROUND: Esthesioneuroblastoma (ENB) is a rare malignant neuroendocrine tumor considered to be radiation sensitive. Local recurrence may be treated in a variety of ways, including stereotactic radiosurgery (SRS); however, little information on its effectiveness is available. OBJECTIVE: To determine whether SRS is effective in providing local control for recurrent ENB. METHODS: This was a retrospective single-institution experience including 109 patients with ENB treated at the Mayo Clinic (1962-2009). Sixty-three patients presented with Kadish stage C disease, and 21 patients developed local recurrence. Of these 21 patients, 7 patients underwent SRS at our institution and an additional patient underwent SRS after transnasal biopsy. Therefore, a total of 8 patients are reported. RESULTS: The median age at time of local recurrence was 50 years. All patients had Kadish C disease at initial diagnosis. Six of 8 patients were found to have Hyams grade 3 disease; the remaining 2 patients had grade 2 disease. The median treatment volume was 8.4 cm3 (mean, 18.9 cm3; range, 1.4-76.3 cm3), and the median dose to the tumor margin was 15 Gy (mean, 14.4 ± 2.2 Gy; range, 10-18 Gy). Of the 16 treatments, 13 had adequate follow-up to assess treatment response, with 92% achieving local control over a median follow-up of 42 months from the time of SRS. Five lesions decreased in size, 7 lesions stabilized, and only 1 lesion had in-field progression. There were no documented complications secondary to SRS. CONCLUSION: SRS appears to be a reasonable and safe option for treatment of intracranial recurrence of ENB. ABBREVIATIONS: EBRT, external beam radiotherapy ENB, esthesioneuroblastoma SRS, stereotactic radiosurgery







Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

New Gene Identified That Causes Inherited Spinal Meningiomas

Genetic medicine experts from Manchester Biomedical Research Centre at Saint Mary's Hospital and The University of Manchester have identified a new gene responsible for causing an inherited form of tumour, known as spinal meningioma. Professor Richard Marias, Director of the Paterson Institute Meningiomas are the commonest form of tumour affecting the brain and spine...







Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

Brain Metastases from Esophageal Cancer- Clinical Review of 26 Cases

Available online 19 February 2013
Publication year: 2013
Source:World Neurosurgery

Objective For the rarity incidence, patients with esophageal cancer metastasized to the central nervous system have rarely reported. The aim of our study was to assess the frequency of brain metastasis from primary esophageal cancer, and to detect the clinical characteristics, diagnosis and prognosis. Methods A retrospective analysis of the medical files was carried out in a series of 26 consecutive patients with central nervous system involvement treated at our institution between 2000 and 2010 from 1612 esophageal primary carcinoma. The clinical history, image, and pathologic findings were analyzed. Results Among the 26 patients, 12 initially presented with a single cerebral metastatic lesion, and 14 had multiple brain lesions. There were 4 patients with adenocarcinoma, 22 with squamous cell carcinoma. Five of them received surgery followed with whole brain radiation, 5 underwent stereotactic radiosurgery, and 13 received whole brain radiation, 3 patients received chemotherapy treatment. The median survival period was 4.2 months, one year survival rate was 5.8%. Conclusions This retrospective study of 1612 patients with esophageal carcinoma at a single medical centre, indicated that 1.61% (26/1612) of these patients had a diagnosis of brain metastasis. The prognosis is poor for the brain metastasis of esophageal carcinoma. Solitary brain lesion, surgery and good KPS may indicate a well prognosis.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

[18F]-fluoro-ethyl-L-tyrosine PET: a valuable diagnostic tool in neuro-oncology, but not all that gl

Background

To assess the sensitivity and specificity of [18F]-fluoro-ethyl-l-tyrosine (18F-FET) PET in brain tumors and various non-neoplastic neurologic diseases.

Methods

We retrospectively evaluated 18F-FET PET scans from 393 patients grouped into 6 disease categories according to histology (n = 299) or distinct MRI findings (n = 94) (low-grade/high-grade glial/nonglial brain tumors, inflammatory lesions, and other lesions). 18F-FET PET was visually assessed as positive or negative. Maximum lesion-to-brain ratios (LBRs) were calculated and compared with MRI contrast enhancement (CE), which was graded visually on a 3-point scale (no/moderate/intense).

Results

Sensitivity and specificity for the detection of brain tumor were 87% and 68%, respectively. Significant differences in LBRs were detected between high-grade brain tumors (LBR, 2.04 ± 0.72) and low-grade brain tumors (LBR, 1.52 ± 0.70; P < .001), as well as among inflammatory (LBR, 1.66 ± 0.33; P = .056) and other brain lesions (LBR, 1.10 ± 0.37; P < .001). Gliomas (n = 236) showed 18F-FET uptake in 80% of World Health Organization (WHO) grade I, 79% of grade II, 92% of grade III, and 100% of grade IV tumors. Low-grade oligodendrogliomas, WHO grade II, had significantly higher 18F-FET uptakes than astrocytomas grades II and III (P = .018 and P = .015, respectively). 18F-FET uptake showed a strong association with CE on MRI (P < .001) and was also positive in 52% of 157 nonglial brain tumors and nonneoplastic brain lesions.

Conclusions

18F-FET PET has a high sensitivity for the detection of high-grade brain tumors. Its specificity, however, is limited by passive tracer influx through a disrupted blood–brain barrier and 18F-FET uptake in nonneoplastic brain lesions. Gliomas show specific tracer uptake in the absence of CE on MRI, which most likely reflects biologically active tumor.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

Choroid plexus papillomas: advances in molecular biology and understanding of tumorigenesis

Choroid plexus papillomas are rare, benign tumors originating from the choroid plexus. Although generally found within the ventricular system, they can arise ectopically in the brain parenchyma or disseminate throughout the neuraxis. We sought to review recent advances in our understanding of the molecular biology and oncogenic pathways associated with this disease. A comprehensive PubMed literature review was conducted to identify manuscripts discussing the clinical, molecular, and genetic features of choroid plexus papillomas. Articles concerning diagnosis, treatment, and long-term patient outcomes were also reviewed. The introduction of atypical choroid plexus papilloma as a distinct entity has increased the need for accurate histopathologic diagnosis. Advances in immunohistochemical staining have improved our ability to differentiate choroid plexus papillomas from other intracranial tumors or metastatic lesions using combinations of key markers and mitotic indices. Recent findings have implicated Notch3 signaling, the transcription factor TWIST1, platelet-derived growth factor receptor, and the tumor necrosis factor–related apoptosis-inducing ligand pathway in choroid plexus papilloma tumorigenesis. A combination of commonly occurring chromosomal duplications and deletions has also been identified. Surgical resection remains the standard of care, although chemotherapy and radiotherapy may be considered for recurrent or metastatic lesions. While generally considered benign, these tumors possess a complex biology that sheds insight into other choroid plexus tumors, particularly malignant choroid plexus carcinomas. Improving our understanding of the molecular biology, genetics, and oncogenic pathways associated with this tumor will allow for the development of targeted therapies and improved outcomes for patients with this disease.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 
Site: www.neurocirurgiabr.com

Wednesday, February 20, 2013

Check out Neuro Exam (only English and Spanish)

Neuro Exam

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Category: Medical

Updated: 20 Feb 2013


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Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais 

Monday, February 11, 2013

Primary adult infradiaphragmatic craniopharyngiomas: Clinical features, management and outcomes in o

Available online 8 February 2013
Publication year: 2013
Source:World Neurosurgery

Objective : This study was designed to evaluate the clinical, radiologic, histologic and surgical outcome characteristics of this disease treated in a single institution. Methods : 16 adult patients underwent trans-sphenoidal microsurgery from October 2005 to December 2010 at Neurosurgical Center of Beijing Tiantan Hospital. The clinical, radiological, operative, and pathological findings of the patients were reviewed retrospectively. Results : Pituitary dysfunction was presented in 12 patients, visual acuity and/or field deterioration was found in 11 patients, and headache was complained in 8 patients. Hyperprolactinemia was presented in 7 of 9 female patients. All lesions were resected by transsphenoidal microsurgery as the primary procedure.A GTR was achieved in 3 of 16 patients, a radical subtotal resection was attained in the rest 13 patients. 9 cases were histologically classified as adamantinous subtype. After a mean follow-up of 50 months, 2 patients experienced recurrence. All female patients who had hyperprolactinemia experienced a gain of function postoperatively. 6 patients experienced new diabetes insipidus. Visual field improved or normalized in 8 of 9 patients. Visual acuity improved in 1 cases and worsened in 1 patient. Conclusion : Primary adult infradiaphagmic craniopharyngiomas are relatively rare lesions occurring in young adults. Pituitary dysfunction, visual acuity and/or field deterioration and headache were the most common chief symptoms. Transsphenoidal surgery, including tearing the cyst walls off the diaphragma sellae and protecting normal pituitary tissue as much as possible, is recommended. Though at the risk of impairing the function of anterior pituitary ,trans-sphenoidal surgery results in a high rate of both visual field and hyperprolactinemia improvement with a low associated risk of recurrence. In terms of pathological aspects, the adamantinous subtype was more common.








Júlio Leonardo B. Pereira
Phone: (+1) 424-2301706
Linkedin:http://www.linkedin.com/in/juliommais