EFO importing incorrect MONDO mapping for Orphanet:761

[cdiaz45]

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Hello, thanks for all the work you do with the ontologies. I am reporting the behaviour below as I found it affected some of my results.

Kind regards!

Describe the bug EFO ontology search returns incorrect MONDO mapping for Orphanet:761. When searching for this Orphanet ID in EFO, it returns MONDO:0017853 (hypersensitivity pneumonitis) instead of the correct disease mapping MONDO:0019167 (immunoglobulin A vasculitis).

To Reproduce Search EFO ontology for Orphanet:761: https://www.ebi.ac.uk/ols4/api/search?q=Orphanet:761&ontology=efo&exact=true Observe returned result: MONDO:0017853 with label "hypersensitivity pneumonitis" Compare with correct mapping by searching all ontologies: https://www.ebi.ac.uk/ols4/api/search?q=Orphanet:761&exact=true See that correct mapping exists: MONDO:0019167 with label "immunoglobulin A vasculitis"

Expected behavior Orphanet:761 should map to "Immunoglobulin A vasculitis" (MONDO:0019167), not "hypersensitivity pneumonitis" (MONDO:0017853).

Screenshots Not applicable - API responses provided in reproduction steps. Upload minimal complete example Not applicable - this is a data mapping issue in existing ontologies. Additional context Root Cause: EFO appears to be importing MONDO terms, but when multiple MONDO mappings exist for the same Orphanet ID, it's selecting the incorrect one (the first one on the list) instead of the disease-name matched mapping. Evidence: ORDO ontology correctly shows: ORDO:761 → "Immunoglobulin A vasculitis" Cross-ontology search finds both the wrong (MONDO:0017853) and correct (MONDO:0019167) MONDO mappings EFO-specific search only returns the incorrect mapping Workaround: Query MONDO ontology directly and verify cross-references rather than relying on EFO's imported MONDO terms.