Abstract 811P
Background
DT combination has shown efficacy in the adjuvant setting for BRAF-mutated melanoma (BMM) patients (pts) in clinical trials. Previous reports from DESCRIBE-AD resulted in promising overall survival (OS) rates at 12 months.
Methods
An observational retrospective study was carried out in 25 GEM sites in Spain. Histologically confirmed and resected BMM pts previously treated with DT according to standard clinical practice in the adjuvant setting were included. Only surgical resection was allowed as a prior treatment to DT. DT discontinuation rate and time to treatment discontinuation were the primary objective. Secondary objectives included safety and efficacy of the combination. Here, we report 3-year results for OS.
Results
From 10/2020 to 03/2021, 65 pts were included. Median age was 58 years, 55% were male and 60%, 25%, and 14% had an ECOG PS 0/1/Uk respectively, one patient presented ECOG 3. Allocation of stage IIIA, IIIB and IIIC according to TNM AJCC 7th edition was 29%, 26% and 32%, respectively. There were 3 pts diagnosed at stage I/II but considered of risk, and 2 pts with stage IV but completely resected, all considered for adjuvant DT. Ulceration was present in 40%, Breslow ≥2 mm in 71%, and nodes were microscopically and macroscopically affected in 39% and 22% of pts, respectively. Only 9.2% of pts discontinued DT prematurely due to toxicity and 21.2% had dose reductions to manage toxicity. After a median follow-up of 36.2 m (range: 13-51.1), the overall OS rate at 3-years was 83.5% (95% CI: 74.5-93.5). According to AJCC 7 stage at diagnosis, the 3-years OS rate was 95.2% (95% CI: 86.6-100), 75% (56-100), and 76.8% (60.7-97.2) for stage I-II-IIIA, IIIB, and IIIC-IV respectively. Throughout the study period 11 (16.9%) pts died, of which 10 died due to disease progression and one due to COVID-19 infection.
Conclusions
Adjuvant treatment with DT for melanoma achieved good treatment compliance and has proven efficacy in the real world. Adjuvant DT has a clinical impact in survival in line with previous clinical trial COMBI-AD.
Clinical trial identification
Editorial acknowledgement
We acknowledge Mfar Clinical Research staff for their assistance in the development of this abstract.
Legal entity responsible for the study
Grupo Español Multidisciplinar en Melanoma (GEM).
Funding
Grupo Español Multidisciplinar en Melanoma (GEM) as Sponsor with Industry partner NOVARTIS.
Disclosure
P. Cerezuela-Fuentes: Financial Interests, Personal, Other, Consultancy, conference,congress attendance/infrastructure: BMS, MSD, Pierre Fabre, Roche, Sanofi, SunPharma. J. Martín-Liberal: Financial Interests, Personal, Other, Lecture fees: Astellas, MSD; Financial Interests, Personal, Other, Lecture fees, advisory fees: Bristol Myers Squibb, Novartis, Pierre Fabre, Pfizer, Roche, Sanofi; Non-Financial Interests, Personal, Member, membership or affiliation: ASCO, ESMO, SEOM, GEM, EORTC, SOGUG, GEIS. L.A. Fernández-Morales: Financial Interests, Personal, Invited Speaker, Speak at sponsored meetings: BMS, MSD, Pierre-Fabre, Roche; Financial Interests, Personal, Other, Speak at sponsored meetings and advisory role: Novartis. J. Medina Martinez: Financial Interests, Personal, Other, Speaker, consultancy or advisory role or similar activity: Novartis, Roche, Pierre Fabre, BMS, MSD, Sanofi. M. Quindós: Financial Interests, Personal, Other, speaker, consultancy and advisory: AstraZeneca, GSK, Merck Sharp & Dohme, Novartis, PharmaMar, Roche, Bristol Myers Squibb, Pierre Fabre; Financial Interests, Institutional, Other, Clinical trials: Merck Sharp & Dohme, Roche, Bristol Myers Squibb. A. García Castaño: Non-Financial Interests, Advisory Role: Bristol, MSD, Novartis. T. Puértolas: Financial Interests, Personal, Invited Speaker, Speaker and advisory role: BMS, Novartis; Financial Interests, Personal, Invited Speaker: Roche, MSD, Sun-Pharma; Financial Interests, Personal, Other, Speaker and advisory role: Pierre-Fabre; Financial Interests, Personal, Advisory Role: Sanofi; Financial Interests, Institutional, Other, Clinical trial: Roche, BMS, Apexigen Inc, Aduro Biotech, Alkermes Inc; Non-Financial Interests, Institutional, Other, congresses inscriptions: Lilly, Sun-Pharma, Novartis, Roche, MSD; Non-Financial Interests, Institutional, Leadership Role, Vocal: GEM (Grupo Español Multidisciplinar de Melanoma); Non-Financial Interests, Institutional, Affiliate: SEOM (Sociedad Española de Oncología Médica), GEM (Grupo Español Multidisciplinar de Melanoma). P. Ayala de Miguel: Financial Interests, Personal, Invited Speaker, Public speaking: Novartis, Merck Sharp & Dohme, Sanofi, Pierre-Fabré. B. Campos: Financial Interests, Personal, Other, Speaker or advisory role: Roche, BMS, Sanofi, Novartis, Pierre-Fabre, Sun Pharma; Financial Interests, Personal, Other, Speaker role: AstraZeneca, Merck, ROVI, Leo Pharma. E. Espinosa: Financial Interests, Personal, Advisory Role, Advisory: BMS, MSD; Financial Interests, Personal, Other, Advisory, educational activities: Novartis; Financial Interests, Personal, Invited Speaker, Advisory, educational activities: Pierre Fabre; Financial Interests, Personal, Funding, Funding for translational investigation: Roche; Non-Financial Interests, Personal, Member, Vicepresident: Grupo Español Multidisciplinario de Melanoma. A. Rodríguez-Lescure: Financial Interests, Personal, Advisory Role: Pfizer, Novartis, ROCHE, AstraZeneca, Daiichi Sankyo, Seagen; Financial Interests, Personal, Invited Speaker, Public speaking: Pierre-Fabre; Financial Interests, Institutional, Research Grant, Grant for Clinical Trials: BMS, Lilly, Roche, Novartis, Amgen, Pzifer, Zimeworks, AstraZeneca, G1 Therapeutics, Bayer. L. Espasa Font: Financial Interests, Personal, Full or part-time Employment: Novartis. G. Belaustegui Ferrández: Financial Interests, Personal, Full or part-time Employment: Novartis. All other authors have declared no conflicts of interest.