Hello, I am new to this forum and am desperately looking for answers and/or reassurance. A difficult one, I know, as I read here so many worried posts. The unknown (or the known) can be so very stressful. My husband has had heavy night sweats for more than two weeks, along with chills in the day (but no fever). He has had a persistent shallow cough for the same period and pain in the groin. He has had so many blood tests, no conclusive results other than very high ferritin levels (which I understand is infection). An ultrasound of the lymph nodes showed nothing. He has been in the hospital for 4 days now and they can't find anything conclusive so the doctor has said he will have a PET scan in the morning, looking for lymphoma or bone marrow cancer. It has scared me terribly (and him too obviously). He is 66, had a nephrectomy last year with Sarcoid RCC kidney cancer. In theory they removed all the cancer. He had his quarterly CT scan (abdomen and chest) only three weeks ago and it all came out good. Could this be cancer again?