Hi. My dad is affected by an adenoid cystic carcinoma located in the skull base (originally the tumor was located in the nasopharynx and is extending itself, so as to the tumor measures almost 7cm*6cm*7cm now). He was already treated by 75 grays radiotherapy in 2006, as well as carbo-taxol chemotherapy, and imatinib 14months ago, without results. He s currently under tamoxifen and is seemed to be stabilized. Can you tell me your opininon about what kind of treatment you may suggest if you were his doctor.