Focal-onset seizure
A focal-onset seizure is a type of seizure originating within networks limited to one hemisphere. They may be discretely localized or more widely distributed, and may originate in subcortical structures.
Also called: Focal onset seizure, Focal seizure, Focal seizures, Focal-onset seizures, Partial seizure, Partial seizures, Seizure affecting one half of brain.
Conditions associated with focal-onset seizure
The following conditions have been associated with focal-onset seizure in medical literature. This is informational and not a diagnosis.
17q11 microdeletion syndrome
17q11 microdeletion syndrome is a medical condition that may be associated with various symptoms and signs....
B-cell immunodeficiency, distal limb anomalies, and urogenital malformations
B-cell immunodeficiency, distal limb anomalies, and urogenital malformations is a medical condition that may b...
Bilateral generalized polymicrogyria
Bilateral generalized polymicrogyria is a medical condition that may be associated with various symptoms and s...
Bilateral perisylvian polymicrogyria
Bilateral perisylvian polymicrogyria is a medical condition that may be associated with various symptoms and s...
Bilateral polymicrogyria
Bilateral polymicrogyria is a medical condition that may be associated with various symptoms and signs....
CDKL5-deficiency disorder
CDKL5-deficiency disorder is a medical condition that may be associated with various symptoms and signs....
Cocaine intoxication
Cocaine intoxication is a medical condition that may be associated with various symptoms and signs....
Cysticercosis
Cysticercosis is a medical condition that may be associated with various symptoms and signs....
DNM1L-related encephalopathy due to mitochondrial and peroxisomal fission defect
DNM1L-related encephalopathy due to mitochondrial and peroxisomal fission defect is a medical condition that m...
Developmental and epileptic encephalopathy 122
Developmental and epileptic encephalopathy 122 is a medical condition that may be associated with various symp...
Developmental and epileptic encephalopathy with spike-wave activation in sleep
Developmental and epileptic encephalopathy with spike-wave activation in sleep is a medical condition that may...
Dravet syndrome
Dravet syndrome is a medical condition that may be associated with various symptoms and signs....
Early infantile developmental and epileptic encephalopathy
Early infantile developmental and epileptic encephalopathy is a medical condition that may be associated with ...
Epilepsy
A neurological disorder characterized by recurrent, unprovoked seizures. Management focuses on seizure control...
Epilepsy with auditory features
Epilepsy with auditory features is a medical condition that may be associated with various symptoms and signs....
Epilepsy with myoclonic-atonic seizures
Epilepsy with myoclonic-atonic seizures is a medical condition that may be associated with various symptoms an...
Familial focal epilepsy with variable foci
Familial focal epilepsy with variable foci is a medical condition that may be associated with various symptoms...
Familial infantile myoclonic epilepsy
Familial infantile myoclonic epilepsy is a medical condition that may be associated with various symptoms and ...
Genetic epilepsy with febrile seizure plus
Genetic epilepsy with febrile seizure plus is a medical condition that may be associated with various symptoms...
Gitelman syndrome
Gitelman syndrome is a medical condition that may be associated with various symptoms and signs....
Guillouet-Gordon syndrome
Guillouet-Gordon syndrome is a medical condition that may be associated with various symptoms and signs....
Homocystinuria due to methylene tetrahydrofolate reductase deficiency
Homocystinuria due to methylene tetrahydrofolate reductase deficiency is a medical condition that may be assoc...
Houge-Janssens syndrome 4
Houge-Janssens syndrome 4 is a medical condition that may be associated with various symptoms and signs....
Isolated focal cortical dysplasia
Isolated focal cortical dysplasia is a medical condition that may be associated with various symptoms and sign...
Jeffries-Lakhani neurodevelopmental syndrome
Jeffries-Lakhani neurodevelopmental syndrome is a medical condition that may be associated with various sympto...
Kleefstra syndrome 1
An autosomal dominant non-syndromic intellectual disability that has material basis in an autosomal dominant m...
Kohlschutter-Tonz syndrome-like
Kohlschutter-Tonz syndrome-like is a medical condition that may be associated with various symptoms and signs....
Lafora disease
Lafora disease is a medical condition that may be associated with various symptoms and signs....
Laminin subunit alpha 2-related congenital muscular dystrophy
Laminin subunit alpha 2-related congenital muscular dystrophy is a medical condition that may be associated wi...
Lennox-Gastaut syndrome
Lennox-Gastaut syndrome is a medical condition that may be associated with various symptoms and signs....
MELAS
MELAS is a medical condition that may be associated with various symptoms and signs....
Meningioma
Meningioma is a medical condition that may be associated with various symptoms and signs....
Morimoto-Ryu-Malicdan neuromuscular syndrome
Morimoto-Ryu-Malicdan neuromuscular syndrome is a medical condition that may be associated with various sympto...
Mowat-Wilson syndrome
Mowat-Wilson syndrome is a medical condition that may be associated with various symptoms and signs....
Mowat-Wilson syndrome due to a ZEB2 point mutation
Mowat-Wilson syndrome due to a ZEB2 point mutation is a medical condition that may be associated with various ...
Mowat-Wilson syndrome due to monosomy 2q22
Mowat-Wilson syndrome due to monosomy 2q22 is a medical condition that may be associated with various symptoms...
NMDA receptor encephalitis
NMDA receptor encephalitis is a medical condition that may be associated with various symptoms and signs....
Niemann-Pick disease type C
Niemann-Pick disease type C is a medical condition that may be associated with various symptoms and signs....
PCDH19 clustering epilepsy
PCDH19 clustering epilepsy is a medical condition that may be associated with various symptoms and signs....
Pan-Chung-Bellen syndrome
Pan-Chung-Bellen syndrome is a medical condition that may be associated with various symptoms and signs....
Tests providers may use to investigate focal-onset seizure
When investigating focal-onset seizure, a healthcare provider may order one or more of the following laboratory tests. Test selection is a clinical decision made by a qualified professional.
CBC with Differential
Measures red blood cells, white blood cells, and platelets to help evaluate overall health and detect disorder...
Comprehensive Metabolic Panel (CMP)
Measures 14 substances in the blood to assess kidney and liver function, electrolyte balance, and blood sugar ...
Urinalysis
Examines urine content to help detect urinary tract infections, kidney disease, and diabetes....
Symptoms commonly seen alongside focal-onset seizure
Convulsive Seizure
A seizure involving stiffening followed by rhythmic jerking of the body, which requires medical attention....
Dysphagia
Difficulty in swallowing....
Fatigue
A subjective feeling of tiredness characterized by a lack of energy and motivation....
Fever
Body temperature elevated above the normal range....
Headache
Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve....
Seizure
A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence ...
When to seek care
Seek care from a qualified healthcare provider if focal-onset seizure is severe, persistent, worsening, or accompanied by concerning symptoms. If you think you have a medical emergency, call your local emergency number immediately.
Frequently Asked Questions
What does the symptom focal-onset seizure mean?
Focal-onset seizure is a health sign or symptom described in medical literature. A focal-onset seizure is a type of seizure originating within networks limited to one hemisphere. They may be discretely localized or more widely distributed, and may originate in subcortical structures.
Which conditions are associated with focal-onset seizure?
Focal-onset seizure has been reported in association with 99 conditions in the medical literature we index, including 17q11 microdeletion syndrome, B-cell immunodeficiency, distal limb anomalies, and urogenital malformations, Bilateral generalized polymicrogyria, Bilateral perisylvian polymicrogyria, Bilateral polymicrogyria. These associations do not mean you have any of these conditions.
Should I see a doctor about focal-onset seizure?
You should discuss any persistent or concerning symptoms with a qualified healthcare provider. This website does not provide diagnosis. If you have severe symptoms or signs of a medical emergency, seek care immediately.