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 href="//commons.wikimedia.org/wiki/File:Piles_diffdiag_01.svg" title="File:Piles diffdiag 01.svg">Piles diffdiag 01.svg</a>
Specifically, it was made abscess-specific by removing fistula labels.
<ul><li>Original:<a href="//commons.wikimedia.org/wiki/User:McortNGHH" title="User:McortNGHH">McortNGHH</a></li></ul>
CC BY-SA 4.0