Angiomas are benign tumors derived from cells of the vascular or lymphatic vessel walls (epithelium) or derived from cells of the tissues surrounding these vessels

Image credit: Michel Royon (link)

Image made by Dr. Michel Royon, by using digital subtraction angiography – taking an X-ray of some body part, injecting fluorescent stuff into the vessels, then taking a second X-ray. Overlay the two images, subtract the non-fluorescent stuff, and you’ve got the shapes of the vessels, hovering in the void that was the subject’s flesh.

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