One thought: Since adenocarcinoma has been mentioned in the doctors' reports -- and assuming the reports mentioned it as a possible or likely finding, not something that has been categorically ruled out -- use the search box (upper right corner of each forum page) to look for postings containing adenocarcinoma.

By clicking on the poster's name, you'll get the link to his/her profile, where you can find his/her e-mail address. There's also a link to send a private message through OCF. You could then contact those who have been diagnosed with it to see if the circumstances in any of their cases were similar to your mother's situation.