A cheeseburger.
Renee Comet (photographer) - edited for transparent background by <font face="Papyrus"><b><font color="#9966CC">-</font><a href="https://en.wikipedia.org/wiki/User:Download" class="extiw" title="en:User:Download"><font color="#7B68EE">down</font></a><a href="https://en.wikipedia.org/wiki/User_talk:Download" class="extiw" title="en:User talk:Download"><font color="#9966CC">load</font></a> <font color="#7B68EE">|</font> <a href="https://en.wikipedia.org/wiki/User:Download/Guestbook" class="extiw" title="en:User:Download/Guestbook"><font color="#8A2BE2">sign!</font></a></b></font>
This image was released by the <a href="https://en.wikipedia.org/wiki/National_Cancer_Institute" class="extiw" title="en:National Cancer Institute">National Cancer Institute</a>, an agency part of the <a href="https://en.wikipedia.org/wiki/National_Institutes_of_Health" class="extiw" title="en:National Institutes of Health">National Institutes of Health</a>, with the ID <a rel="nofollow" class="external text" href="https://visualsonline.cancer.gov/details.cfm?imageid=2652">2652</a> (<a rel="nofollow" class="external text" href="https://visualsonline.cancer.gov/retrieve.cfm?imageid=2652&amp;dpi=300&amp;fileformat=jpg">image</a>) <a class="external text" href="https://commons.wikimedia.org/w/index.php?title=Category:Media_from_National_Cancer_Institute_Visuals_Online_with_known_IDs&amp;filefrom=2652#mw-category-media"><small>(next)</small></a>.