Gerard Michel
Analyst · Bill Maughan from Canaccord Genuity
Thank you, everyone, for joining today. This is the first quarter Delcath is reporting U.S. revenue a significant milestone for the company. In the first quarter, revenue from our sales of HEPZATO was $2 million and for CHEMOSAT $1.1 million. Given the March start for 3 of the 4 U.S. centers active in the first quarter and the temporary use of product sampling for some of the initial product of cases. The $2 million in U.S. revenue was predominantly generated by treatments at Moffitt, with the balance of the other 3 centers activated in the first quarter, starting to generate consistent revenue in the second quarter.
As we have discussed in prior calls, the pace of revenue growth in the short to medium term will be determined whether rate at which we can train and activate new treating centers. Since our launch in January and in the 7 weeks since our recent fourth quarter call, we have made steady progress in expanding the number of centers we are engaged with and actively training. We ended the first quarter with 4 active sites, Moffitt Cancer Center, Stanford University Cancer Center; Thomas Jefferson University and the University of Wisconsin. As of today, there are 6 active treating centers with the University of Tennessee and the UCLA Cancer Center having recently conducted their first commercial treatments.
A further 5 centers have completed the necessary steps to conduct their first commercial treatment under the guidance of a proctor once hospital formulary committee approval is obtained and are in the process of identifying and scheduling the first patients for treatment with HEPZATO. In total, there are 11 centers an increase of 2 from our last call, currently accepting patient referrals and listed on our health care studying locator. Beyond those 11 centers, another 7 centers currently have preceptorships scheduled are partway through the preceptorship training. To date, we have had over 100 perfusionist, anesthesiologists and interventional radiologists attend preceptorships, representing over 20 institutions in the U.S. with some institutions sending multiple health care providers for the same specialty.
As a reminder, the entire process from initially scheduling a preceptorship to activation can take approximately 3 months. Given the significant level of commitment required from health care providers to become fully trained and certified under the REMS program, we believe all the health care providers and the cancer centers involved to date intend to incorporate HEPZATO as a core part of their treatment regime for metastatic uveal melanoma patients. We continue to expand the number of centers with which we are engaging with over 30 centers now somewhere in the process from preliminary discussions regarding the steps required to become a treating center to actively treating patients.
There has been a definite increase in interest, partially due to physicians at treating centers sharing their experience with physicians at other centers which are not yet involved. There is certainly a component of what I might characterize as informal and independent peer-to-peer engagement occurring. In addition, increased interest can also be attributed to our permanent and product-specific J-code becoming effective on April 1. While we are aware that hospitals have successfully been reimbursed for the treatment using miscellaneous J-code prior to April 1, the establishment of the permanent J-code has definitely simplified the reimbursement process and the willingness of formulary committees to approve the use of HEPZATO.
We believe we are on track to have 20 active centers by the end of 2024. The approximate anticipated pacing of center activation remains at 10 active centers by the end of the second quarter, 15 by the end of the third quarter, and 20 treating centers by year-end. Our projected average treatments per center remains at approximately 1 per month, ramping to a run rate of approximately 1.5 treatments per month by midyear and then reaching a run rate of 2 treatments per month late in the fourth quarter.
It is important to note that given our expected ramp for both treatment per center volume and center activation, we should achieve $10 million in U.S. quarterly revenue in 2024 which will likely result in $25 million of cash proceeds from the exercise of the final tranche of warrants issued as part of our March 2023 financing. Sandra will share additional details on our financials in a moment, but I want to highlight that our effective gross margin in the first quarter was approximately 60% despite the modest initial volume.
In addition to the significant commercial activity, we continue to support both internal and external efforts to add to a growing body of evidence that the PHP procedure is an important treatment option for patients with liver dominant uveal melanoma as well as potentially other liver-dominant cancers. Recently, we announced the publication of results from the pivotal Phase III FOCUS study of HEPZATO in patients with unresectable metastatic uveal melanoma in the journals Annals of Surgical Oncology. As previously disclosed at ASCO, the publication reported a statistically significantly higher overall response rate of 36.3% for HEPZATO versus 5.5% from a meta-analysis of historical controls. Other efficacy end points include a 7% complete response rate with a 73.6% disease control rate.
In addition, results from the early randomized stage of the FOCUS trial which was initiated as a randomized 2-arm trial but completed as a single-arm study will be presented at a poster session at the upcoming ASCO Annual Meeting in Chicago. Later in the year, we expect also to publish an expanded analysis of various patient subpopulations in a peer-reviewed journal. Liver-dominant metastatic disease is a significant therapeutic challenge in an area of high unmet medical need for many solid tumor types. To support additional clinical development in some of these areas, it is important for the company to build a strong commercial foundation in metastatic uveal melanoma in the U.S. both for purposes of funding trials as well as creating a network of treating centers.
We are well on our way to accomplishing this. While the interest level from interventional radiation....
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