I was married or 10 years to someone who suffered from an atypical form of bipolar disorder who, around the age of 6, had been hospitalised with peritonitis caused by her appendix. Whilst I was with her I attended Manic-Depressive Fellowship meetings … and met 2 other people who displayed atypical bipolar symptoms who as children had had “near-death” experiences as a consequence of developing peritonitis caused by their appendix.
I can find no literature that links these 2 conditions … that peritonitis may in some way cause life-long bipolar-like symptoms.
Brain Trauma is a known cause of psychiatric disorders in general. It is a rare and poorly studied cause of cycling bi-polar conditions.
Sepsis is a known co-morbidity of Brain Trauma, associated with negative outcomes.
The situation you have described is an interesting footnote that might make an interesting small research project. In the short term, it doesn’t look like it would have any particular significance in /helping/ or /preventing/ problems, but it might be easier to study than “psychiatric disorders in general”. If it’s a real association, it might turn up in socialstyrelsen, the Danish cohort, or somewhere else in NordForsk.
I’m not an expert: most of what I know is only from 50 years of reading medical journals. When I get a chance, I’ll ask a psychiatrist.
IANAD, but my uninformed guess is that it would be the other way around: having a psychiatric disorder, atypical bipolar or other, might make you less aware of or able to communicate the first symptoms of appendicitis, which might well end with a ruptured appendix, quickly followed by peritonitis.