GunsmokeFan said...
My understanding of the focal cryotherapy is that (as explained in Katz's book) that argon gas is used to freeze the affected areas. Is that different from focal laser ablation? We are in Chicago, do you know of any good docs here for either of these procedures?
They are almost opposites. With cryo, cooled argon is used to ablate the tissue, and they use a warming gas like helium to prevent excess damage to surrounding tissue. Lasers, on the other hand, heat up tissue to destroy it. They are both called "thermal" in the sense that tissues are destroyed by heat or the lack of it. Other forms of thermal ablation are photodynamic therapy, radiofrequency, microwave, and high-intensity ultrasound.
Because heat (or cold) travels, they all share the risk of destroying healthy tissues, so you wouldn't want them if the tumor is close to the NV bundle or the urinary sphincter, rectum, or bladder neck. They also may incompletely treat the tumor, so there is a high degree of recurrence relative to radical therapies. Because of that and because prostate cancer is multi-focal 80% of cases (even if the other foci of cancer are too small to be detectable by current technology), it is especially a poor idea for unfavorable risk cancers like your husband's. Because of that, and because his cancer may have spread considerably over the last two years, focal ablation of any kind is not a good therapy for him now. As I said, he really has to have a repeat biopsy before deciding on
any therapy.
- Allen