# Strange diseases in downloaded data

**URL:** <https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284>\
**Category:** Data issue\
**Created:** [21 November 2023 14:43 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284 "2023-11-21T14:43:05Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![tzukuo](https://avatars.discourse-cdn.com/v4/letter/t/46a35a/32.png) [@tzukuo](https://community.opentargets.org/u/tzukuo)\
**Post date:** [21 November 2023 14:43 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284/1 "2023-11-21T14:43:05Z")

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Dear Open Targets Community,

I downloaded OT Genetics data preprocessed by OT Platform to analyze them locally. However, the data include some strange disease descriptions (diseaseFrmSource):

 ![image](https://europe1.discourse-cdn.com/flex017/uploads/opentargets/original/1X/882a131c5c958931550e94a9d52b6f15e2b49663.png)  
While the EFO code means diet measurement, the description seems unlikely derived from the ontology. Could anyone please talk about where those descriptions came from or how the diseases were preprocessed by OT?

Best regards,  
Tzu-Hao Kuo

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**Author:** ![dsuveges](https://dub1.discourse-cdn.com/flex017/user_avatar/community.opentargets.org/dsuveges/32/30_2.png) [@dsuveges](https://community.opentargets.org/u/dsuveges)\
**Post date:** [21 November 2023 15:15 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284/2 "2023-11-21T15:15:45Z")

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Hi,

The EFO mappings for GWAS studies are imported from the GWAS Catalog, where curatos assign the most granular EFO terms available based on the trait description provided by the authors.

Sometimes ontogy won’t provide the sufficient granularity to capture the studied phenotype in its entire complexity. In these cases, to make sure users have the complete trait description, this information is captured under `diseaseFromSource` field.

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**Author:** ![tzukuo](https://avatars.discourse-cdn.com/v4/letter/t/46a35a/32.png) [@tzukuo](https://community.opentargets.org/u/tzukuo)\
**Post date:** [21 November 2023 15:37 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284/3 "2023-11-21T15:37:08Z")

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Thank you for your prompt response, @dsuveges ! The data seems to come from UK Biobank-based analysis (NAELE) instead of GWAS Catalog.

 ![image](https://europe1.discourse-cdn.com/flex017/uploads/opentargets/original/1X/3115869ce1a643254bfcdaa373cf8969a4e32586.png)

Do the importing procedures differ?

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**Author:** ![dsuveges](https://dub1.discourse-cdn.com/flex017/user_avatar/community.opentargets.org/dsuveges/32/30_2.png) [@dsuveges](https://community.opentargets.org/u/dsuveges)\
**Post date:** [21 November 2023 16:44 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284/4 "2023-11-21T16:44:16Z")

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Yes, you’re right. In which case the curation happened in house within Open Targets by the Genetics Team, but the process is generally the same. The label `diseaseFromSource` is coming from the source and is as complete as possible, while the `diseaseFromSourceMappedId` is an ontology representation, which might not be as complete.

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**Author:** ![tzukuo](https://avatars.discourse-cdn.com/v4/letter/t/46a35a/32.png) [@tzukuo](https://community.opentargets.org/u/tzukuo)\
**Post date:** [21 November 2023 20:09 UTC](https://community.opentargets.org/t/strange-diseases-in-downloaded-data/1284/5 "2023-11-21T20:09:59Z")

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Many thanks! That’s clearer now