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Related Concept Videos

Seizures l: Introduction01:20

Seizures l: Introduction

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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,...
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Seizures: Classification01:13

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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:
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Epilepsy and Seizures: Overview01:24

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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...
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Seizures ll: Types01:19

Seizures ll: Types

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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...
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Cancer Prevention02:59

Cancer Prevention

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
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Drug Toxicity: Risk factors01:24

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Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
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Risk of Cancer in Patients With First-Time Seizure.

Andreas Lund Pedersen1, Dóra Körmendiné Farkas1, Cecilia Hvitfeldt Fuglsang1

  • 1Department of Clinical Epidemiology, Center for Population Medicine, Aarhus University and Aarhus University Hospital, Aarhus, Denmark.

JAMA Neurology
|April 27, 2026
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Summary
This summary is machine-generated.

First-time seizures may signal undiagnosed cancer, with a significantly higher short-term risk for neurological cancers. This highlights the need for comprehensive diagnostic evaluations following initial seizure events.

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Area of Science:

  • Neurology
  • Oncology
  • Epidemiology

Background:

  • Seizures are a known cancer complication, but their role as an initial indicator of undiagnosed cancer is not well-established.
  • Understanding the cancer risk following a first-time seizure is crucial for early diagnosis and patient management.

Purpose of the Study:

  • To investigate the risk of neurological and nonneurological cancers in individuals experiencing their first seizure compared to the general population.
  • To determine if first-time seizures serve as an early warning sign for occult cancers.

Main Methods:

  • A population-based cohort study utilizing Danish nationwide medical registries from 1996 to 2022.
  • Inclusion criteria: adults (≥18 years) with a first-time hospital diagnosis of seizure and no prior cancer diagnosis.
  • Outcomes: absolute risks (ARs) and standardized incidence ratios (SIRs) for all, neurological, and nonneurological cancers within specific follow-up periods (1 year, 1-5 years, 5-20 years).

Main Results:

  • First-time seizures were associated with significantly elevated short-term cancer risk (SIR for any cancer: 5.30).
  • A markedly higher short-term risk was observed for neurological cancers (SIR: 76.1).
  • Long-term cancer risk remained slightly elevated, suggesting a potential link to occult cancers.

Conclusions:

  • First-time seizures are associated with a substantial short-term and a moderate long-term risk of developing cancer.
  • These findings suggest that first-time seizures may represent an early clinical manifestation of both neurological and nonneurological occult malignancies.
  • The results underscore the importance of thorough diagnostic workups for patients presenting with a first-time seizure.