postencephalitic Parkinson disease
MONDO:0001945Mondo
Findings
No curated finding names postencephalitic Parkinson disease yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
A disease believed to be caused by a viral illness that triggers degeneration of the nerve cells in the substantia nigra. Overall, this degeneration leads to clinical parkinsonism.
Definition from the Mondo Disease Ontology (MONDO:0001945), read 2026-09-29. CC BY 4.0.
Features
41 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Resting tremorHPOHP:0002322
- Very frequent (80% to 99% of cases)
- Abnormal pyramidal signHPOHP:0007256
- Frequent (30% to 79% of cases)
- Babinski signHPOHP:0003487
- Frequent (30% to 79% of cases)
- BradykinesiaHPOHP:0002067
- Frequent (30% to 79% of cases)
- Cogwheel rigidityHPOHP:0002396
- Frequent (30% to 79% of cases)
- DrowsinessHPOHP:0002329
- Frequent (30% to 79% of cases)
- FeverHPOHP:0001945
- Frequent (30% to 79% of cases)
- Generalized muscle weaknessHPOHP:0003324
- Frequent (30% to 79% of cases)
- Involuntary movementsHPOHP:0004305
- Frequent (30% to 79% of cases)
- Oculogyric crisisHPOHP:0010553
- Frequent (30% to 79% of cases)
- Poor speechHPOHP:0002465
- Frequent (30% to 79% of cases)
- Abnormal CSF protein concentrationHPOHP:0025456
- Occasional (5% to 29% of cases)
Show the remaining 29
- Abnormal respiratory system physiologyHPOHP:0002795
- Occasional (5% to 29% of cases)
- Abnormal substantia nigra morphologyHPOHP:0045007
- Occasional (5% to 29% of cases)
- Abnormality of eye movementHPOHP:0000496
- Occasional (5% to 29% of cases)
- Abnormality of mental functionHPOHP:0011446
- Occasional (5% to 29% of cases)
- Aggressive behaviorHPOHP:0000718
- Occasional (5% to 29% of cases)
- AkinesiaHPOHP:0002304
- Occasional (5% to 29% of cases)
Where it sits
Other names
1 name
Resolves to: postencephalitic Parkinson disease
- Also called
- postencephalitic Parkinsonism