Sacroiliitis

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Science and technology

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What Wikipedia says

Sacroiliitis is a condition caused by inflammation within the sacroiliac (SI) joint, where the base of the spine (called the sacrum), and the pelvis (called the ilium), connect. The term "sacroiliitis" combines the words sacrum, ilium, and the Latin term "itis", which denotes inflammation.

Excerpt from the Wikipedia article “Sacroiliitis”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Fiona McQueen, Marissa Lassere and Mikkel Østergaard., CC BY 2.0, via Wikimedia Commons.