Is there much of this type of thing hiding on PubMed?
Not a source I had previously associated with top-tier humor.
This one is quite good: https://pmc.ncbi.nlm.nih.gov/articles/PMC300808/
Also https://www.cell.com/cancer-cell/fulltext/S1535-6108%2802%29...
I believe every year The Canadian Medical Association Journal publishes a mostly-humorous edition around Christmas. And there's a long history of satire in NEJM, BMJ, The Lancet, etc
I particularly enjoy this one (PDF):
http://cda.psych.uiuc.edu/multivariate_fall_2013/salmon_fmri...