There are many. This is why many elective procedures associated with anxiety and depression now require psych evals before a surgeon will consent to do them, at least at more prestigious medical centers. You'll note if you go in for cosmetic surgery, lap band, gastric bypass, etc. many of these centers will ask for you to see a psych before proceeding.
Additionally, more anecdotally, have you ever visited the "alt med" internet? It's literally swarms of people with anxiety and depression obsessing over how random medical minutiae (related to their dental work, their lap-choli, etc.) explain their set-of-symptoms-that-are-typical-anxiety.
These "similar sets of cases" aren't hidden. They're ubiquitous. They just set themselves as opposed to (1) the idea that they might have a psychological illness, and (2) anything that smacks of "establishment" medical care (which they both view with anxiety and with disdain and hurt, because it was that establishment that does not take their complaints at face value.)
Additionally, more anecdotally, have you ever visited the "alt med" internet? It's literally swarms of people with anxiety and depression obsessing over how random medical minutiae (related to their dental work, their lap-choli, etc.) explain their set-of-symptoms-that-are-typical-anxiety.
These "similar sets of cases" aren't hidden. They're ubiquitous. They just set themselves as opposed to (1) the idea that they might have a psychological illness, and (2) anything that smacks of "establishment" medical care (which they both view with anxiety and with disdain and hurt, because it was that establishment that does not take their complaints at face value.)