This is a modified version of the original by Armin Kübelbeck [CC BY 3.0 (<a rel="nofollow" class="external free" href="https://creativecommons.org/licenses/by/3.0">https://creativecommons.org/licenses/by/3.0</a>)], via Wikimedia Commons, <a class="external free" href="https://commons.wikimedia.org/wiki/File%3APiles_diffdiag_01.svg">https://commons.wikimedia.org/wiki/File%3APiles_diffdiag_01.svg</a>
Specifically, it was made abscess-specific by removing fistula labels.
<a href="//commons.wikimedia.org/wiki/User:McortNGHH" title="User:McortNGHH">McortNGHH</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>