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UBERON:0002030 nipple should be part_of UBERON:0001911 mammary gland #1873
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I would argue that mammary glands and nipples (or teats) are 'part of' the
breast. Nipples or teats are not parts of the mammary glands.
Robert E. Druzinsky, Ph.D.
Clinical Associate Professor
Dept. of Oral Biology
College of Dentistry
University of Illinois at Chicago
801 S. Paulina
Chicago, IL 60612
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Website: www.peerj.com/RobertDruzinsky
…On Thu, Mar 24, 2022 at 10:57 AM paolaroncaglia ***@***.***> wrote:
Closed #1873 <#1873>.
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remember uberon is multi-species
I am reopening until we address this. As @paola-scibite points out we have a taxon GCI saying it's part of the gland in mouse, but that is weirdly specific and it looks like was put there to be consistent with MA (cc @tfhayamizu) - taxon GCIs should be reserved for true taxon-specificity we want a consistent story about the relationship of nipple to gland across all mammalian ontologies one approach here would be to define a new mereological sum something like mammary unit, consisting of the gland and 'adnexa' - nipples, surrounding tissue. I am not sure if this takes the ontology into strange ontological abstraction territory though |
@RDruzinsky @cmungall
Exactly. Only the 'thoracic mammary gland' is part_of 'breast'. Nipples in mammals are generally located on the whole trunk, and cows' teats would be part_of 'abdominal mammary gland'...
But 'areola' and 'mammary fat pad' are - here's the current view: If areolas and fat tissue are considered part_of mammary glands, rather than adjacent to or similar, then nipples and teats should be too. I suspect that the difference in the existing GCIs
As I said, currently 'mammary gland' does consist of gland + some adnexa. So we either strip the gland of all current adnexa and add a new term for mammary unit, or we leave things as are and make nipple part of mammary gland. |
This ticket was opened by me while working on SciBite stuff, i.e. I noticed this issue by chance; it isn't strictly required for any of the EBI projects I contribute to. However, Chris thinks that Uberon should address this. So I'll leave the ticket open, I'll remove my assignment, but I won't assign others - I've added to the agenda for a future Uberon call. Thanks. |
assigning myself as I'm trying to not let tickets go unassigned. happy to make the changes once it is discussed and there's a clear actionable item here. |
I think the most practical thing to do here is to treat mammary gland as including adnexa. As Paola says we already do this in part. Let's just be consistent. |
probably my ignorance on non-brain related biology here, but I'm still not 100% sure what the conclusion means in terms of something actionable - does this mean that I should make nipple part_of mammary gland? |
Based on Chris' comment above, I believe so. Please see my rationale summarised at the bottom of this previous comment of mine: #1873 (comment) |
From a clinical perspective, I agree with this statement and do not consider a nipple to be part of the gland. One may also consider supernumerary nipples that develop without (polythelia) or with (polymastia) accessory glands. A nipple does not have to exist as part of a mammary gland. On the broader discussion... The nipple is a "projection of skin containing the outlets for 15-20 lactiferous ducts arranged cylindrically around the tip." |
From #2560 @raymond91125 Uberon term Suggested revision and reasons |
PS I have not made the change as @bvarner-ebi has brought up some points that I think need to addressed. Might need to wait till next uberon meeting to discuss this properly and make a final call on it? |
Ah, did not see the thread. Thanks. @shawntanzk |
This is now blocking other issues. I think we need some decision on this. maybe there can never be complete consensus as lines are drawn differently for different purposes by different communities. The most important thing is that we are clear and consistent about some lines. We can always make new bundles or subdivide things further it people need that (see my comment earlier). I suggest that when proposing that X is part of Y or not part of Y, this is justified by a clear proposed definition of X and Y that makes it clear:
Avoid vague terms like "projection of" unless this is itself defined. Is a projection of something also a part of it? Or continuous with it? Line drawing figures showing boundaries can be very helpful here |
Uberon call: we make nipple part of mammary generally (currently a GCI) |
I have not forgotten about all of the other mammals. I am trying to be
precise. I would like to reserve the term 'mammary gland' to mean the
glandular tissue or parenchyma and the ducts, and use a different term for
the whole organ - breast, in humans and perhaps other mammals with a single
thoracic pair, or mamma (pl. mammae) is a term that can be used for any
milk producing organ.
Granted, many folks use 'mammary gland' to mean the whole organ. I don't
agree but maybe I have to live with that.
…On Fri, Mar 25, 2022, 4:26 AM paolaroncaglia ***@***.***> wrote:
@RDruzinsky <https://github.com/RDruzinsky> @cmungall
<https://github.com/cmungall>
Thanks for your feedback,
I would argue that mammary glands and nipples (or teats) are 'part of' the
breast.
remember uberon is multi-species
Exactly. Only the '*thoracic* mammary gland' is part_of 'breast'. Nipples
in mammals are generally located on the whole trunk, and cows' teats would
be part_of 'abdominal mammary gland'...
Nipples or teats are not parts of the mammary glands.
But 'areola' and 'mammary fat pad' are - here's the current view:
[image: Screenshot 2022-03-25 at 10 13 13]
<https://user-images.githubusercontent.com/4982516/160091249-34b02d7c-0c44-432e-a564-868ea7e4f27b.png>
If areolas and fat tissue are considered part_of mammary glands, rather
than adjacent to or similar, then nipples and teats should be too. I
suspect that the difference in the existing GCIs
nipple and ('part of' some 'Mus musculus') SubClassOf 'part of' some
'mammary gland'
nipple and ('part of' some 'Homo sapiens') SubClassOf 'part of' some breast
derives from the observation that mice don't have breasts while humans do.
But we should find a solution that works for all mammals, and
I am reopening until we address this. As @paola-scibite
<https://github.com/paola-scibite> points out we have a taxon GCI saying
it's part of the gland in mouse, but that is weirdly specific and it looks
like was put there to be consistent with MA (cc @tfhayamizu
<https://github.com/tfhayamizu>) - taxon GCIs should be reserved for true
taxon-specificity
we want a consistent story about the relationship of nipple to gland
across all mammalian ontologies
one approach here would be to define a new mereological sum something like
mammary unit, consisting of the gland and 'adnexa' - nipples, surrounding
tissue. I am not sure if this takes the ontology into strange ontological
abstraction territory though
As I said, currently 'mammary gland' does consist of gland + some adnexa.
So we either strip the gland of all current adnexa and add a new term for
mammary unit, or we leave things as are and make nipple part of mammary
gland.
Other gland terms in Uberon have parts that are not strictly glandular
ducts, e.g. capsule of liver and liver blood vessel are part of liver.
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I agree with @RDruzinsky's comment above. Breast does not equal mammary gland. |
Uberon term
UBERON:0002030 nipple
Suggested revision and reasons
UBERON:0002030 nipple isn't linked to mammary gland (other than indirectly via
develops_from some mammary ridge
and
mammary duct channels_into some nipple).
Please consider adding
nipple part_of mammary gland
because in species that have nipples, these are always part of a mammary gland.
Thanks,
Paola
Update: on further analysis, I see that 'nipple' has 2 general class axioms:
nipple and ('part of' some 'Mus musculus') SubClassOf 'part of' some 'mammary gland'
nipple and ('part of' some 'Homo sapiens') SubClassOf 'part of' some breast
I still think that 'nipple' should always be part of 'mammary gland', but the existence of the axioms above suggests that there may have been previous discussion on this, so I'll leave things as they are and close.
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