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4 patient data entries in database for clusters 4 and 5.

Entry
#
Mutations
allele 1allele 2
Clinical representationSymptomsAge groupAge of onsetAge of patientAge of deathReference
229W748S5
E1143G
R232H4
Alpers, age of onset 6 months, age of death 13 months. 41% mtDNA copy number. During the first 6 months of life, he was considered healthy, but was irritable with colic-like symptoms. failure to thrive, delayed motor development. myoclonus. leftsided hemiparesis.
-myoclonic seizures
-hemiparesis
-failure to thrive
-Alpers syndrome
-encephalopathy
-developmental delay
-epilepsy
infantile
0.5n/a1.08Kollberg et al, 2006;

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700L244P4
W748S5
E1143G
epilepsia partialis continua at 10 months, pyramido-cerebellar syndrome 19 months, myoclonic seizures when 4.5 years old. myoclonic jerks. At the age of 8 years, a brain CT scan showed atrophy of the right occipital cortex. signs and symptoms of liver dysfunction. chronic progressive liver disease. diffuse cortical atrophy. myoclonic epilepsy became resistant to any medication, myoclonic status along with episodes of respiratory failure. His clinical condition rapidly worsened and led to a vegetative state.
-myoclonic seizures
-epilepsy
-epilepsia partialis
-liver dysfunction
-respiratory deficiency
infantile
0.8915Simonati et al, 2003b;

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701L244P4
W748S5
E1143G
myoclonic fits of the right limbs and then a dystonic-ataxic syndrome at the age of 5 months. He had a rapid clinical deterioration. At age 6 months, a brain CT scan showed diffuse cortical atrophy. acute hepatic failure.
-liver failure
infantile
0.42n/a1.1Simonati et al, 2003b;

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20G737R5
R232H4
S64L
Peripheral neuropathy, tremor, ataxia.
-movement disorder (ataxia)
-peripheral neuropathy
-tremor
childhood
10n/an/aHarrower et al, 2008;

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1-5 pathogenic cluster assignment of mutations. Mutations displayed without a superscript number are outside of the assigned pathogenic clusters. See cluster definitions for details.

Number of displayed patient cases: 4
Avg age of onset in displayed cases: 2.9
Std dev in onset in displayed cases: 4.1

Search criteria for patient entries:
Mutations Entry IDs Clusters Reference Residue range
Patients for cluster combinations:
First cluster: Second cluster:
Age group: Any Infantile Childhood Juvenile Adult
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