Trust your doctors more than people on here or elsewhere on the internet; as well meaning as people are, they don't have the benefit of seeing your OH's medical records.
I don't think there is any questioning the lymph node involvement in your case - the examples given by members above are not comparable. There are two types of "lymph node involvement"
- the first is where one or two nodes close to the prostate have picked up some cancer cells; these do not always rule out curative treatment as they can be removed during prostatectomy or zapped during radical radiotherapy, for example
- the second is metastatic spread in the lymphatic system, indicated by cancer in a number of nodes around the body; this is incurable but often responds well to chemo and hormone treatment. Your OH falls into this group.
On that basis, it doesn't really matter whether the grey area on his sternum is benign or cancerous; it makes no difference to his treatment, outlook, longevity ... in many ways, a bone met causes far less problems than multiple lymph node mets. So if you can, put the worry about his sternum in a box - it is probably irrelevant.