Originally I took some text from Tinus Smits' website and posted it here, but I think I should just direct you to his site to read his own writing on the remedy.
www.tinussmits.nl
click on "Inspiring Homeopathy" link and read. You'll be surprised to learn that Carcinosin has been studied, used, and documented by Boericke and Burnett, long before Foubister; and that there are other homeopaths who have conducted provings of the remedy on their own.
Just a little note: I had a teacher once, very much like Hans in his condemnation of the use of this remedy "because it had never been proved" (although there is literature which proves this belief to be a myth, along iwth a wealth of a century of use and the clinically verified results of using the remedy, provided by a number of homeopaths). He treated a patient of mine several years ago, and prescribed phosphorus for him,
which did nothing at all. Too bad he was so averse to the remedy he didn't give Carcinosin, which, it turns out, looks an awful lot like a similimum at this stage of his treatment. To me, the phosphorus simply didn't fit this patient, physically or mentally/emotionally. It looked like it might be close, but simply wasn't.
It may be too early to tell, but after the carcinosin, some lifelong problems have already been resolved, some major changes have been put into place in the patient's life, and many painful, long standing (more than 12 years, in some instances) physical complaints are disappearing in the right direction of cure. It remains to be seen whether or not the remedy will "hold", but for now, all things look very good.
BIAS is still BIAS, and whenever it is put into play it is always the patient who ends up paying the price.
Also, I shudder to think what would have happened to Amy Lansky's son Max if her homeopath decided to conclude, erroneously, that Carcinosin just wasn't "known" enough to be used. Thankfully, she has a son who is fully cured of autism after being given only that remedy. Again: bias costs. Hahnemann said so. Groove on that a little while, Hans.