Bill Cavanagh
Analyst · Maxim Group
Thanks Tom. Hello everyone and I'd like to say it's very satisfying to see the hard work of the IsoRay team resulting in gains we've seen these past five quarters. It's very exciting time to be part of the team and I think the best is yet to come. Tom noted IsoRay's two-pronged strategy that we feel will bring continued growth now and in the future. First, we're actively participating in the reinvigoration of the prostate brachytherapy treatment market and the placement of IsoRay Cesium-131 based products right into this center of this resurgence. It may help to keep in mind that permanent implant prostate brachytherapy or seed implantation has been considered a viable approach to prostate cancer for nearly a 100 years. The idea that low energy radiation sources could provide very high therapeutic radiation doses to the prostate, while limiting potentially damaging doses to surrounding tissues is highly appealing for cancer treatment. The problem for sometime had been in the success replacement of these seeds in the prostate. The seed placement issue was overcome in the 1980s with the introduction of new ultrasound technology that allowed for careful placing of seeds into the prostate. At the same time, changes were occurring in diagnostic methods including the introduction of TFA that ended up in the diagnosis of a large number of men with early stage prostate cancers who could be treated with brachytherapy. From the 1990s through the early 2000s, the utilization of seed implants in the treatment of a new population of men with prostate cancer dramatically increased for those who chose to forego radical surgery and other treatment approaches that led to significant treatment related side effects. Importantly, during the 1990s, researchers were able to publish what we call 10-years study on outcomes following prostate cancer treatment with the available implantable isotopes, Iodine-125 and Palladium-103. Prostate cancer grows slowly, and the long-term survival of patients with most prostate cancers is longer in general than most other cancers. And the time required to detect the failure of treatments to control these prostate cancers is approximately 10 years. The first implant with IsoRay is Cesium-131 occurred in 2004. And therefore, IsoRay's Cesium-131 compared to other isotopes with 10-year track records was handicapped from its introduction. In the past few years, we have witnessed the emergence of studies detailing five to eight year outcomes following Cesium-131 prostate brachytherapy from both the University of Pittsburgh and Dr. Brian Moran's Outfit at the Chicago Prostate Cancer Center. These reported outcomes have been excellent and in line with the other long-term disease control studies reported by the competitive isotopes in the industry over the past 20 years. The University of Pittsburgh has also specifically reported a very favorable side effect profile following Cesium-131 from prostate brachytherapy including the absence of what we call late radiation side effects. Keep in mind that the biologic benefits of seed implants provide a continuous dose of radiation that bombards the cancer that is attempting to grow as opposed to conventional external beam radiation that divides the treatment into dozens of fractions separated into daily treatments that takes weeks to complete. The duration of the brachytherapy dose is dependent upon the half life of the isotope. This duration can be over six months with Iodine-125 whereas it is approximately 30 days with Cesium-131. The Pittsburgh findings suggest that the shorter duration of radiation spares Cesium patients' months of urinary side effects that might result from longer lived isotope radiation. Now, in 2018, we are confident that these same centers will be in a position to report nine and 10-year results following Cesium-131 prostate brachytherapy. In essence, we see this reporting as leveling the playing field as Cesium-131 finally catches up with the earlier established isotopes. We feel that these publications will be significant reporting events will serve to reduce barriers to acceptance of Cesium-131 that were based on the absence of long-term data in the past. We expect 10-year data to be released within the next year. We believe that we can leverage these potential long-term favorable outcomes Cesium-131 into an environment in which it is becoming increasingly clear that prostate brachytherapy must play a key role in the treatment of intermediate to high risk localized prostate cancers. Data continues to materialize that strongly suggests that intermediate and high risk disease outcomes are significantly improved when using a combination therapy of brachytherapy seeds and external beam radiation therapy. The most significant data recently published is based on the ASCENDE-RT trial which was a randomized trial that made a comparison of external beam radiation and hormonal therapy versus external beam radiation hormonal therapy and brachytherapy. The studies major finding was that recurrence rates were significantly lower when adding brachytherapy 22% recurrence rate versus 42% recurrence rate over a nine-year period, favoring the group that received the brachytherapy implant. We also believe that reducing the side effect profile of prostate cancer treatment in both the low risk and the high risk patient will continue to be a paramount importance to patients, to physicians, and ultimately to the healthcare system. Towards this end, we have initiated multiple research programs that seek to deliver optimal radiation with Cesium-131, while minimizing side effects such as difficulties with the male urinary system. In the preceding time, while we have waited for long-term follow-up of these prostate cancer series, we've been able to collaborate with oncologists who have directed Cesium-131 brachytherapy against more aggressive cancers that cause serious problems in the short-term. Chief among these are recurrent cancers which are those that have resisted previous treatment with radiation and/or surgery. We have been quite fortunate to work with investigators largely in university settings who have observed excellent control rates in recurrent cancers of the brain, the gynecologic track, and the head and neck. In most cases these cancers under study have recurred despite intensive radiation treatment. Getting back to the short half life of Cesium-131, it has been considered by radiation biologists for some time relatively rapid delivery of radiation by IsoRay Cesium-131 seeds confronts fast growing cancers more effectively than the much slower radiation dose emitted by Iodine-125 which is the most widely used in brachytherapy isotope. A very interesting series that we think illustrates this benefit is the University of Kentucky working recurrent gynecologic cancers. One publication by the UK Group describes a group of women who experienced rapid regrowth of cancers of the vagina after hysterectomy and radiation treatment. By inserting Cesium-131 sources directly into these cancers, the physician researchers observed the retreat of these cancers which in many cases is in sharp contrast of life changing pelvic organ renewal, that was considered one of the only options left for these women. Keep in mind that in general, the appeal of brachytherapy with Cesium-131 is in the high B conformal doses of radiation therapy that avoid or spare high doses to neighboring tissue. It is difficult to overstate the value of such treatment in the setting such as the brain where it is very clear that putting significant radiation dose outside the cancerous target causes incremental brain injury. Currently IsoRay has over a half dozen major academic centers using Cesium-131 seeds in the management of a variety of brain cancers. This strategic idea is also driving the new product development as in the case of GammaTile, as mentioned by Tom, which was developed by experienced brain cancer specialists from the Barrow Neurological Institute. The adoption of Cesium-131 brain breaking therapy is due to the ease and reproducibility of the brain implant developed by this group is getting close to commercialization with potential clearance by the FDA in mid-2018. There are more initiatives occurring that I can go into here, but I would emphasize that the dual strategy of stimulating the prostate brachytherapy sector based on very compelling emerging data, stressing the need of brachytherapy, along with long-term Cesium-131 outcome data, coupled with an expanding interest in the vexing problems presented by recurring cancer where Cesium-131 is finding a presence and creating market opportunities was very significant for the company. Thank you. I would like to now turn the call back to Tom. Tom?