@wolfhound1966 Quite the mouthful for the diagnosis, isn't it? I found this article by the Nat'l Institute of Health https://www.ncbi.nlm.nih.gov/pubmed/9865824 that may give you some insight. Apparently, there may be further testing to determine the primary cause of the adenocarcinoma, so treatment can be tailored to your situation.
Have you been able to determine the background of the oncologist you will see? One of the best cancer centers near you is OSHU Knight Cancer Institute [which appears to have at least 3 different campuses near Portland, not sure which one has a sarcoma unit].
Will you let us know what the oncologist recommends to you, please?
I am tagging @merpreb into this, as she is a member and Volunteer Mentor in the Lung Cancer group, where there seems to be several with adenocarcinoma. She may have some insight for you.
Ginger