Hi,. sorry you have to be here, your dad is lucky that you are though.
Dont have much to offer, hopefully others wioth more experience in this particular situation will chime in.. they usually do.
I did want to say that I'm quite SURE that many have had pca spread to the bone and also had atrhritis..
Butr as far as treatement, you shopuld know there have need several drugs recenlty having hown some success in that area,
One that Ive beeN folowing is XL184:
http://www.exelixis.com/pipeline/xl184
They had some amazing results that were reported - specifically in stopping progression in the bones, and pain.
I dont want to get your hopes up (actually, I wish I could)... but here's some other info on that drug - and I wish you and your dad the best!:
High Rates of Complete or Partial Bone Scan Resolution
Of 62 patients evaluable by bone scan, 53 (85%) achieved either complete or partial resolution of metastatic lesions on bone scan by independent radiologist review. Eight other patients (13%) had stable disease (SD) on bone scan, resulting in an overall rate of disease control in bone of 98% (61/62). Only one patient (2%) had progressive disease as their best assessment. High rates of bone scan resolution were observed in both docetaxel-pretreated and docetaxel-naïve subgroups.
http://www.businesswire.com/news/home/20110217006894/en/Cabozantinib-XL184-Phase-2-Data-Demonstrate-Encouraging