Googling "PTSD and cancer" (without quotes) also produces a large number of hits on this subject, in addition to the ones Redwing57 mentions. After looking at a few, this one struck me as being a good overall view of it:
www.healthline.com/health-news/cancer-treatment-leaves-survivors-with-ptsd-scars-031215#7This article also presents the term "psychiatric oncology," which, when googled, itself produces a good many probably useful hits.
The term PTSD, originally associated mainly with battlefield mental trauma, seems to be taking its place as an appropriate diagnosis for a good many other psychological impairments.
Aside to WAORGANY:
As a fellow combat veteran (Vietnam), I understand how PTSD might well have gotten a hold of you. I seemed to have escaped it myself, fortunately, but I entirely agree with the point you make, that fighting in a war and battling cancer are strikingly similar in many ways.
In both one identifies and fights an enemy, wins some battles and loses others, accepts losses and regroups at times, plans and executes strikes on the enemy, often successfully, and the list goes on. So it only seems reasonable that something like PTSD would occur in both of these kinds of struggles.
And the solutions being tried for military PTSD may well apply to helping with cancer PTSD as well.By the way, WAORGANY, because of your military service surely you are already aware of the U.S. government benefits available to you through the VA (or possibly Tricare in your case?) and you have applied for them?