[chrisldgk]

One thing that I can’t seem to parse from the article is why the researchers assume that this is an unresearched part of ADHD and not a different disorder entirely. I’m sure they have their reasons, but I don’t think it’s written in the article.

To me it seems that if it’s not „treatable“ the same way ADHD is, I’m not sure if it’s useful to categorize it as such. On the other hand, I’m happy if kids with this disorder can get a diagnosis and treatment that actually helps them sometime in the future due to this research.

[pdpi]

You have a set of diagnosis criteria, and matching those criteria gets you the ADHD diagnosis. This study takes people who fit the diagnosis, and says there's a test you can do to split those people into three groups.

But yes, once they have a better understanding of what that difference means, the next step might well be to split the ADHD diagnosis into two separate disorders, or even that, like cancer, ADHD is actually a whole range of separate but related conditions.

[ivewonyoung]

Diabetes has a similar issue, with type 1 and type 2 having very different causes and pathologies.

[1659447091]

> why the researchers assume that this is an unresearched part of ADHD and not a different disorder entirely

Whether or not the extreme dysregulation is a different disorder in its own right or not, is not relevant here. They are grouping ADHD matches; clinically recognized ADHD presentations plus MRI recognized ADHD which have a distinct brain sub-pattern occurring in people that have the same distinct behavioral traits. ADHD frequently has co-occurring conditions.

"Identifying “specific subtypes” of ADHD will make it easier to treat these children effectively". Having a more objective way to diagnosis for things like that seems to be the focus of the approach. They expect it to keep evolving, so I wouldn't say they are assuming anything about absolute labels -- just grouping what they now know to be true, that certain external traits match certain distinct brain patterns that are within the larger adhd brain structure.

Also, I think it's not that it is "not treatable" as ADHD, it's that ADHD can be treated in many different ways and currently the wide variety of responses to such is still a black box. Adderall instant release could briefly make me tired, I would sometimes break off a small piece and use it as a sleep aid. Some other `treatments` (I prefer societal alignment coping aid) resulted in what seemed like an expensive joke. Subtypes may eventually be able to show which options work best for which types and to start there first, instead of the current default iteration.

This link adds more about their research. https://medicalxpress.com/news/2026-03-distinct-adhd-biotype...

[halper]

It is a good point and I also struggled with that bit somewhat. It is different in so many ways, have different symptoms, does not respond (as well) to the same medication, and affect different parts of the brain. The jump from there to "subtype" was not too logical for me ...