A 30-year-old man who completed a successful course ...
Adjustment disorder with anxiety
Yep, and I think what we are supposed to take from this Q is:
The only info. we have for this patient is that he ended chemo 2 months ago and has been calling the doctor a lot -- this is supposed to mean he has been calling a lot since ending chemo 2 months ago. His frequent calls starting after ending chemo and within 3 months of the stressor fits with the above-stated definition of "adjustment disorder" with anxiety.
I stressor in this case could possibly be either the actual illness or the ending of chemo/treatment. It probably does not matter much in this case.
I think part of it stems from the fact that this patients symptoms are occurring within the time-frame for adjustment disorder while SSD seems to have a longer timeline. Aside from that I find it difficult to see why SSD wasn't a possible answer.
To add to that, I inferred that the obsession with checking temp and with the tingling sensation were signs provided to him by the physicians of recurrence. He is anxious over his cancer recurring, and they are more specific than a variety of body complaints
In somatic symptom disorder, the motivation is unconscious. I think for the patient in this Q-stem, his motivation is conscious -- he wants to make sure that recurrence of cancer is not going "undetected".