Scientists discover a new human organ hiding in plain sight
It's been there the whole time, but researchers couldn't see it because they'd always cut through it.
Ever heard of the "interstitium"?
That's what researchers are referring to when they talk about a new human organ that's been pretty much hiding in plain sight.
It seems that the body's connective tissue is fluid-filled, a feature that hadn't been noticed before, largely because doctors and researchers typically cut through that layer when studying the cells of a human body; basically, they treat samples with chemicals, then cut them into thin slices, and dye them to highlight key features. This drains the fluid that creates this new organ and so, voila: it disappears or becomes unnoticeable.
They found it using new technology called confocal laser endomicroscopy (pCLE).
Previously, researchers believed these tissue layers to be a dense "wall" of collagen—a strong structural protein found in connective tissue. The new finding reveals that, instead of a wall, this tissue is, rather, an “ open, fluid-filled highway,” said co-senior study author Dr. Neil Theise, a professor of pathology at New York University Langone School of Medicine. The tissue contains interconnected, fluid-filled spaces that are supported by a lattice of thick collagen bundles, Theise said in the report.
It takes peer review and scientific consensus for the interstitium to actually gain the status of a new organ in the human body, but this research is a start along that path.
The finding may help decipher how cancer travels to lymph nodes; if the malignant cells cross over into the interstitium, they are on a direct path to the lymph nodes because that fluid drains into the lymphatic system.
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