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Start free with EleplanIntermittent hydrarthrosis
ORPHA:329967Disease
What it is
A rare rheumatologic disease characterized by recurrent self-remitting episodes of acute monoarticular arthritis, often with a fixed periodicity, typically affecting the knee or another large joint, which develops an effusion over 12 to 24 hours with only mild to moderate pain and minimal signs of inflammation. Attacks last three to five days and may parallel menses in females. Systemic symptoms are absent, and no joint damage occurs.
Key facts
- Age of onset
- Adult
- Classified as
- Disease
Signs and symptoms
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Genes
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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