Osteoid osteoma

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Science and technology

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What Wikipedia says

An osteoid osteoma is a benign (non-cancerous) bone tumor that arises from osteoblasts and some components of osteoclasts. It was originally thought to be a smaller version of an osteoblastoma. Osteoid osteomas tend to be less than 1.5 cm in size.

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

Image: Hellerhoff, CC BY-SA 3.0, via Wikimedia Commons.