Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Seizures l: Introduction

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...

Seizures: Classification

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:

Seizures ll: Types

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...

Epilepsy and Seizures: Overview

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...

Epilepsy ll: Types

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.

Dementia

Dementia

Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Use of N-hexyl Cyanoacrylate Monomers for the Treatment of Intra- and Extracranial Arteriovenous Malformations: A Single-Center Experience.

Cureus·2025

Same author

Technical nuances of side-to-side and end-to-side microvascular anastomosis in the experimental Wistar rat model.

Acta neurochirurgica·2024

Same author

Novel technique of development of human derived acellular dermal matrix.

Cell and tissue banking·2021

Same author

[Minimally invasive percutaneous musculoskeletal biopsy performed by Interventional Pathologist for myopathy study. Twenty years of experience].

Revista espanola de patologia : publicacion oficial de la Sociedad Espanola de Anatomia Patologica y de la Sociedad Espanola de Citologia·2021

Same author

Initial experience and one-year follow-up with Neuroform Atlas Stent System for the treatment of brain aneurysms.

Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences·2019

Same author

Giant cell myositis associated with myasthenia gravis and thymoma.

Medicina clinica·2018

Search research articles

Related Experiment Video

Updated: Jun 24, 2026

Community-based Adapted Tango Dancing for Individuals with Parkinson's Disease and Older Adults

Community-based Adapted Tango Dancing for Individuals with Parkinson's Disease and Older Adults

Published on: December 9, 2014

72 year-old man with new seizure while dancing.

Julio César Gutiérrez Morales¹, Sandra Eugenia Gutiérrez Morales, Aurora Astudillo González

¹Department of Neurosurgery, Hospital Universitario Central de Asturias, Oviedo, Spain.

Brain Pathology (Zurich, Switzerland)

|March 18, 2009

Summary

Metastasis of kidney cancer to a brain tumor (meningioma) is rare. This case highlights a unique "tumor in tumor" presentation, with renal cell carcinoma found within a meningioma.

More Related Videos

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits

Published on: March 27, 2021

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Related Experiment Videos

Last Updated: Jun 24, 2026

Community-based Adapted Tango Dancing for Individuals with Parkinson's Disease and Older Adults

Community-based Adapted Tango Dancing for Individuals with Parkinson's Disease and Older Adults

Published on: December 9, 2014

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits

Published on: March 27, 2021

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Area of Science:

Neuropathology
Oncology
Neurosurgery

Background:

Metastasis of extracranial tumors to intracranial meningiomas is exceptionally uncommon.
Meningiomas are typically benign tumors of the meninges.

Observation:

A 72-year-old male presented with a grand mal seizure.
Neuroradiological imaging identified an extraaxial lesion in the right frontal lobe.
Histopathological analysis revealed a meningothelial meningioma with metastatic renal cell carcinoma.

Findings:

This case represents one of the few documented instances of renal cell carcinoma metastasizing to a meningioma.
The imaging findings were suggestive but not definitive for this rare metastatic pattern.
The co-occurrence of primary meningioma and secondary renal cell carcinoma metastasis forms a 'tumor in tumor' phenomenon.

Implications:

This case expands the understanding of rare metastatic pathways for renal cell carcinoma.
It underscores the importance of comprehensive histopathological examination for accurate diagnosis.
Further research into the mechanisms of such 'tumor in tumor' presentations is warranted.