Tetrarch spots, vitiligo, or something else? - The Horse Forum
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post #1 of 4 Old 10-15-2019, 04:45 AM Thread Starter
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Tetrarch spots, vitiligo, or something else?

My older TB has always had what I’ve thought were tetrarch spots. However, over the last few months, I’ve noticed more popping up, including a large patch on his cheek. Do tetrarch marks spread? Or does this look like vitiligo or something else?

Below is a pic of him wet, since it’s easier to see them.
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post #2 of 4 Old 10-15-2019, 07:18 AM
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Most likely it's just because he's greying out. He'll eventually turn "white" all over.

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post #3 of 4 Old 10-15-2019, 07:55 AM
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I didn't know tetrach spots were a thing, but they look like the description.
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post #4 of 4 Old 10-15-2019, 08:32 AM
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I always thought tetrach spots were like the the reverse of bend or. Where bend or is over pigmentation of the hair - tetrach is depigmentation with no loss of color to the skin below. White hair/dark skin. There were a couple of Spanish type horses in Tx that had areas where the skin randomly depigmented in small spots at different places on the body not so much the muzzle or sheath area. Wet they had an odd look because the spots showed up really well.
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