Novel systemic therapies in hard to treat fibrolamellar hepatocellular carcinoma.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. e16653-e16653
Author(s):  
Ariel Gliksberg ◽  
Claire O'Grady ◽  
Paul Kent

e16653 Background: Fibrolamellar Carcinoma (FLC) is a very rare liver malignancy of young adults without underlying liver disease (0.02 per 100,000 in the US).. Complete resection is the primary therapy, but recurrence rates are still > 50%. Currently there are no established systemic treatments, especially for high-risk disease (unresectable, relapse, progression, or metastatic disease). At our institution triple therapy “TT” with Nivolumab/5FU/Interferon α-2b is our first line, followed by other novel combination therapies such as Gemcitabine/Oxaliplatin/Lenvantinib (GOL) or Nivolumb/Lenvantinib/Quecertin (NLQ). Objective: To evaluate the tolerability and early response of multi-agent systemic therapies in patients with high-risk FLC. Methods: Data from all patients with FLC who received systemic therapies from 5/2018 to 2/2020 was reviewed to assess tolerability, survival and toxicity. Results: Nineteen patients were treated with systemic therapies of which 16 (10F, 6M median age of 19) were evaluable based on follow up scans. Between our 16 patients they had relapsed 28 times, 12 had metastatic disease and 7 had tried 2+ systemic therapies. RECIST 1.1 objective response (CR+PR) and tumor control (CR+PR+SD) are 44% and 69%. Since starting multi-agent therapy, all 6 patients who had previously been treated with monotherapy, have already exceeded their previous longest time to progression. Thirteen patients were treated with “TT” [12.5 median cycles (6-38)]. Three patients were treated with NLQ including 2 who failed TT. Of these, the 1 evaluable patient achieved CR. Two patients were treated with GOL, 1 who failed TT and one who was post liver transplant, both had sustained PR of 6 and 9 months. Subsequently one died and one achieved CR. For the 6 patients who achieved remission before or during therapy, only 1 has relapsed. To date the period of response is already 68% longer than the previous best length of response. There was 1 withdrawal due to grade 3 colitis and 2 dose adjustments. All experienced mild adverse effects, most commonly fever, headache, and hypertension, with 3 patients with grade 3 toxicities. Conclusions: FLC is a devastating disease with patients often relapsing even after successful surgical remission. Currently there is a need for tolerable systemic therapies. Although at our institution, TT is our frontline therapy, there are other combinations of immunochemotherapies that we have used to treat FLC with preliminary success and minimal toxicities. Our early results show that multi-agent systemic therapy in hard-to-treat FLC is worthy of further study.

2020 ◽  
Vol 38 (4_suppl) ◽  
pp. 510-510 ◽  
Author(s):  
Claire O'Grady ◽  
Ariel Gliksberg ◽  
Paul Kent

510 Background: Fibrolamellar Carcinoma (FLC) is a rare liver cancer affecting young adults without underlying liver disease. Surgery is the only proven therapy, and recurrence is common. There are no proven systemic treatments, especially for high-risk FLC (unresectable, relapse, progression, metastatic). Research suggests that immunotherapy may work. We share our experience using systemic “triple immunochemotherapy” (TT): 2 week cycles of 7 days continuous infusion 5FU or oral capecitabine, interferon alpha-2b on days 1,3,5,7 or PEG-Interferon and nivolumab on day 1. Methods: Data from all patients who received TT from 5/2018 to 9/2019 was reviewed to assess tolerability, survival and toxicity. Results: 14 patients were treated with TT of which 10 (8F,2M with a median age of 20) were evaluable. They received a median of 13 cycles (6-31). At time of analysis, the median progression free survival was 6 months, 22% longer than prior to TT, with 80% of patients (8) stable or improving, 1 progression, and 1 who died 2 months after initiating TT. For the 4 patients who achieved surgical remission, none have relapsed (PFS 9 months). Overall objective response (CR+PR) and tumor control rate (CR+PR+SD) were 60% and 80%, respectively. There were no withdrawals from treatment due to side effects, though 2 had dose adjustments. All experienced mild adverse effects, most commonly fever and headache, but only 2 patients had grade 3 toxicity. Conclusions: Our early results of TT for high-risk FLC are promising, with good tolerability and treatment response, particularly in patients who have achieved surgical CR. Further longitudinal data is needed to confirm outcomes, especially in patients still early in their treatment. [Table: see text]


2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e16161-e16161
Author(s):  
Sara Gottlieb ◽  
Ariel Gliksberg ◽  
Erik Schadde ◽  
Paul Kent

e16161 Background: Fibrolamellar carcinoma (FLC) is an exceedingly rare liver cancer affecting children and young adults without underlying liver disease. Complete surgical resection is the primary treatment option, but recurrence is common. There are currently no established systemic therapies. We have treated patients in both the neoadjuvant and adjuvant setting with three novel combination therapies: 5-fluorouracil/interferon/nivolumab (“Triple Therapy” or TT), gemcitabine/oxaliplatin/lenvatinib (GOL), and nivolumab/lenvatinib/quercetin (NLQ). The purpose of this study was to evaluate objective responses and tolerability of three multi-agent systemic therapies in the treatment of FLC. Methods: Data from all patients with FLC who received TT, GOL, or NLQ between May 2018 and February 2021 were reviewed. Patients who received a minimum of six cycles of systemic therapy with follow up scans at least two months after initiation were assessed based on objective response, survival, and toxicity. Results: Twenty-nine patients with FLC who were treated with novel multi-agent systemic therapy were evaluable based on the above criteria. Median age at start of treatment was 20 (7-52; 16F, 12M, 1 non-disclosed). Twenty-three patients received one combination therapy (13 TT, 8 GOL, 2 NLQ), five received two different lines (3 TT/NLQ, 2 TT/GOL), and one patient received all three novel combinations. Between our 29 patients, they had relapsed 36 total times, and 11 had already tried 2+ systemic therapies. Best RECIST 1.1 objective response (clinical remission + partial response) and tumor control rate (clinical remission + partial response + stable disease) were 58%/95%, 55%/100%, and 33%/83% for TT, GOL, and NLQ respectively. The median longest Progression Free Survival (PFS) on any novel multi-agent regimen was 9 months (2-29; 9.5 for TT, 7 for GOL, 6.5 for NLQ), with 18 patients still receiving the therapy extending their PFS. Of those with previous relapses, 56% have a PFS longer than their previous longest remission and 69% have a PFS longer than their previous shortest time to relapse. Half of patients with previous relapses are still receiving the treatment responsible for their longest PFS. Fever, chills, and nausea were the most common adverse effects experienced throughout all three regimens. Seven patients experienced 1+ grade 3 adverse event. There were no toxic deaths or organ failure. Two patients died as a result of disease; their longest PFS (1 on GOL, 1 on TT) were nine and 10 months. Conclusions: FLC is a devastating cancer with patients often relapsing even after successful surgical remission. There is a strong need for effective and tolerable systemic therapies for those with unresectable, relapsed, progressive, or metastatic disease. We have had promising results in treating FLC and prolonging survival with minimal toxicities using novel multi-agent regimens.


Oncology ◽  
2021 ◽  
Vol 99 (5) ◽  
pp. 310-317
Author(s):  
Sara Gottlieb ◽  
Claire O’Grady ◽  
Ariel Gliksberg ◽  
Paul Kent

Introduction: There are no standard systemic therapies for the treatment of fibrolamellar carcinoma (FLC), as surgery remains the only definitive option. We share our experiences using systemic “triple therapy” (TT) with 5-fluorouracil, interferon, and nivolumab for the treatment of relapsed, refractory, metastatic, or unresectable FLC. Methods: Data from all patients who received TT from May 2018 to July 2020 were reviewed to assess response, survival, and toxicity. Results: A total of 22 patients were treated with TT, of which 14 (median age of 21 years) were evaluable. They received a median of 18 cycles (8–44). At the time of analysis, the median progression-free survival was 9 months (4.5–26), 29% longer than prior to TT, with 5 patients achieving clinical remission, 8 patients stable or improving, and 1 progression. Overall objective response (clinical remission + partial response) was 50% and tumor control rate (clinical remission + partial response + stable disease) was 93%. Two patients withdrew from treatment due to side effects. Discussion/Conclusion: Our early results support TT as a promising medical option to slow disease progression and prolong survival in high-risk patients with FLC. TT can be administered in the outpatient setting and has shown good tolerability. Further longitudinal data is needed to confirm outcomes, especially in patients still early in their treatment.


2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e16184-e16184
Author(s):  
Jeffrey Sum Lung Wong ◽  
Gin Wai Kwok ◽  
Vikki Tang ◽  
Bryan Li ◽  
Roland Ching-Yu Leung ◽  
...  

e16184 Background: Hepatic derangement commonly accompanies advanced HCC (aHCC) and limits the use of systemic therapies. We aimed to evaluate the use of single agent anti-PD-1 nivolumab or pembrolizumab in Child-Pugh (CP) grade B or C patients with aHCC. Methods: Consecutive aHCC patients with CP grade B (CPB) or C (CPC) liver function who received single agent nivolumab or pembrolizumab were analysed. Objective response rate (ORR), time-to-progression (TTP), overall survival (OS), and treatment-related adverse events (TRAEs) were assessed. Results: Between May 2015 and June 2020, 61 patients were included. The median age was 60 (range 28-82). 81% and 4.8% had hepatitis-B and hepatitis-C related HCCs respectively. 72.1% (n = 44) were of CPB and 27.9% (n = 17) were of CPC. Amongst CPB patients, 19 (31.1% of all patients) had CP score 7 (CP7) and 25 (41.0% of all patients) had CP score 8 or 9. The median follow-up was 2.3 months. The ORR of CPB and CPC patients were 6.8% and 0% respectively (p = 0.553). The TTP of CPB and CPC patients were 2.1 months (95% C.I. 1.4-2.8) and 1.4 months (95% C.I. 0.6-2.1) respectively (p = 0.204). CPB patients had significantly better OS than CPC patients (3.1 months (95% C.I. 1.4-4.7), vs. 1.7 months (95% C.I. 1.0-2.4), p = 0.041). Compared to CP score ≥8 (CP≥8) patients, CP7 patients had significantly better OS (median OS CP7 6.7 months (95% C.I. 4.0-9.3), vs. CP≥8 1.8 months (1.2-2.4), p = 0.002). Patients with diuretic-refractory ascites had significantly worse OS compared to those without (1.7 months (95% C.I. 1.0-2.5) vs. 3.7 months (95% C.I. 0.1-7.3), p = 0.004). Portal vein (PV) thrombosis was also significantly associated with inferior survival, with median OS of patients with any PV thrombosis being 1.8 months (95% C.I. 1.0-2.5), compared to 5.3 months (95% C.I. 2.4-8.1) of those without (p = 0.004). The median number of doses given was 3 (range 1-34). Median treatment duration was 5.0 weeks (range 0-77). Overall, 25.4% of patients experienced TRAEs and 4.8% experienced grade ≥3 TRAEs. The most common TRAEs were skin-related (13.1%) and constitutional symptoms (6.6%). Conclusions: Nivolumab/pembrolizumab had acceptable safety in CPB/C patients with aHCC. CP7, absence of diuretic-refractory ascites and lack of PV thrombosis were associated with better survival.


Author(s):  
Martee L. Hensley

Overview: Uterine sarcomas are rare cancers, they comprise only 5% of all uterine malignancies. There are about 2,000 cases of uterine sarcoma diagnosed annually in the United States. Uterine sarcomas may be categorized as either favorable-risk, low-grade malignancies with a relatively good prognosis or as poor-risk, high-grade cancers that carry a high risk for tumor recurrence and disease progression. Expert histologic review is critical for appropriate diagnosis and management. Uterine sarcoma histologies considered to carry a more favorable prognosis include low-grade endometrial stromal sarcomas and adenosarcomas. The high-grade sarcomas include high-grade leiomyosarcomas, high-grade undifferentiated endometrial sarcomas, and adenosarcomas with sarcomatous overgrowth. The favorable histology, low-grade uterine sarcomas may be cured with surgical resection of uterus-limited disease. These tumors are often hormone-sensitive, and treatment with hormonal therapies may be efficacious for patients with advanced, unresectable disease. High-grade uterine leiomyosarcomas and undifferentiated endometrial sarcomas carry a high risk for recurrence, even after complete resection of uterus-limited disease. No adjuvant intervention has been shown to improve survival outcomes. Advanced, metastatic disease is generally treated with systemic cytotoxic therapies, which may result in objective response but is not curative. Selected patients with isolated metastatic disease and a long disease-free interval may benefit from metastatectomy.


Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 1941-1941 ◽  
Author(s):  
Meletios A. Dimopoulos ◽  
Ramón García-Sanz ◽  
Maria Gavriatopoulou ◽  
Pierre Morel ◽  
Marie-Christine Kyrtsonis ◽  
...  

Abstract Abstract 1941 Rituximab and bortezomib are active agents in the treatment of WM. Based on preclinical studies which indicated synergism between bortezomib and rituximab, in 2006 we designed a large phase II multicenter trial to evaluate the combination of these agents in previously untreated patients with WM requiring therapy based on consensus recommendations (Kyle et al, Sem Oncol 2003;30:116). This trial was conducted by the European Myeloma Network in 10 centers. In order to prevent the “IgM flare effect” seen with rituximab-based regimens, one course of single agent bortezomib was first administered at a standard dose of 1.3 mg/m2 IV on days 1, 4, 8 and 11. Ten days later, the patients received four courses of 35 days duration each. In courses 2 to 5, bortezomib was administered weekly at a dose of 1.6 mg/m2 on days 1, 8, 15 and 22. During courses 2 and 5, immediately after the administration of bortezomib, patients received dexamethasone 40 mg IV followed by rituximab 375 mg/m2 IV. Patients received a total of 8 infusions of rituximab. Bortezomib was administered weekly in order to reduce the incidence of neurotoxicity which can be significant in WM patients treated with standard schedule bortezomib (Treon et al, Clin Cancer Res 2007;13:3320). A single dose of dexamethasone was given before each dose or rituximab in order to take advantage of potential synergism with rituximab and to reduce allergic reactions but to avoid steroid-induced complications. During treatment, valacyclovir prophylaxis for herpes zoster was prescribed. After completion of treatment, patients with CR, PR, MR or SD according to consensus criteria (Kimby et al, CLM 2006;3:380) were followed without further therapy until there was evidence of progressive disease. Dose modifications for toxicity were allowed and bortezomib could be reduced from 1.6 mg/m2 to 1.3 mg/m2 to 1.0 mg/m2. The trial was initiated in March 2007, 61 patients were scheduled to be enrolled and the study completed accrual in June 2010. Patients characteristics included: age >65 years in 60% of patients, hemoglobin <11.5 g/dL in 82%, platelet count <100×109/L in 17%, β2-microglobulin >3 mg/dL in 63%, serum monoclonal protein >7 g/dL in 3.4%, lymphadenopathy in 42%, splenomegaly in 29%, and B-symptoms in 42% of patients. According to IPSS for WM, 18% of patients were rated as low risk, 23% as intermediate risk and 59% as high risk. The main reasons to start treatment included cytopenias in 43% of patients, hyperviscosity in 22%, presence of B-symptoms in 18% and lymphadenopathy in 8%. So far, 54 patients are evaluable for response. On an intent to treat, response rating include CR in 2 (4%), PR in 33 (61%), MR in 8 (15%), SD in 5 (9%) and PD in 6 (11%) patients. In responding patients, at least MR occurred within 2.3 months of treatment and the median time to best response is 4.8 months. Plasmapheresis was not required in any patient before or after treatment with BDR. An “IgM flare phenomenon” was not seen and this was attributed to the initial course of single agent bortezomib. Median follow up for all patients is 12 months, and so far 10 patients have progressed. Eight patients have died, 5 due to causes unrelated to WM or complications of treatment. Toxicities include: neutropenia (grade ≥3) in 13% of patients; thrombocytopenia (grade ≥3) in 5%; peripheral sensory neuropathy, grade 1,2 in 30%, but grade ≥3 in only 5%; neuropathic pain in 17%, but grade ≥3 in only 2%, gastrointestinal toxicity, grade 3 in 7%; and infections in 17% (grade ≥3 in 7%). One patient died of septic shock in absence of neutropenia. Three patients (5%) experienced pulmonary toxicity (grade 3/4) which was attributed to bortezomib and consisted of dyspnea, decrease of O2 saturation and diffuse pulmonary infiltrates on chest CT scan. This toxicity resolved completely after administration of steroids and 2 of 3 patients continued treatment as per protocol. Only one patient (who had discontinued valacylovir prophylaxis) developed herpes zoster. The dose of bortezomib was reduced in 30% of patients primarily because of peripheral neuropathy. This is the largest trial that has evaluated the role of a bortezomib-containing regimen in the frontline setting of symptomatic patients with WM, most of whom were rated as high risk according to IPSS. We conclude that the BDR regimen is active. An update on response, toxicity and time to progression will be performed in November 2010. Disclosures: Dimopoulos: Ortho-Biotech: Honoraria; Millennium: Honoraria. Off Label Use: Bortezomib for Waldenstrom's Macroglobulinemia. García-Sanz:Ortho-Biotech: Honoraria; Millennium: Honoraria; Celgene: Honoraria. Merlini:Millennium: Honoraria; Ortho-Biotech: Honoraria. Sonneveld:Ortho-Biotech: Membership on an entity's Board of Directors or advisory committees; Millennium: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees.


2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 14599-14599
Author(s):  
N. Lee ◽  
S. Bae ◽  
S. Lee ◽  
D. Kim ◽  
K. Kim ◽  
...  

14599 Background: We prospectively conducted a phase II trial to test the efficacy and safety of irinotecan, 5-fluorouracil and leucovorin (FOLFIRI) regimens for the first-line treatment of previously untreated patients with recurrent or metastatic advanced CRC. Methods: Thirty-four previously untreated patients with advanced CRC were enrolled in this study from June 2001 to December 2006. Eligible patients had histologically confirmed adenocarcinoma, no prior systemic therapy in palliative setting, ECOG PS = 2, adequate organ function, written informed consent and at least one measurable disease. The patients received either irinotecan 180 mg/m2 on day 1 with a LV bolus of 200 mg/m2 and a FU bolus of 400 mg/m2, and this was followed by a FU continuous infusion of 600 mg/m2 on day 1 and day 2 (the classic FOLFIRI regimen), or they were treated with a LV bolus of 400 mg/m2 and a FU bolus of 400 mg/m2 followed by a FU continuous infusion of 2,400 mg/m2 for 46 hours (the simplified FOLFIRI regimen), and these treatments were repeated every 2 weeks until disease progression. Results: There were 13 females and 21 males with median age of 54 years (range: 41–79). The most common metastatic sites were lung and liver. A total of 262 cycles were administrated with median 6 cycles per patient (range: 1–22). All pts were evaluable for toxicity, and 30 pts for response to the treatment. The objective response rate was 26.4% with 2 complete responses respectively. Sixteen (47%) pts had stable disease and 7 (20.5%) had a progression. The tumor control rate was 73.4%. The median TTP was 5.3 months, and the overall survival was 10.1 months. The prognostic factor for longer TTP and survival was the ECOG performance status (PS). The type of regimens was not affected on response rate, TTP and survival. The chemotherapy was generally well tolerated and the most common grade 3–4 toxicities were neutropenia, diarrhea. The non- hematological toxicities were similar for both treatment groups, with more frequent grade =3 neutropenia being noted for the simplified FOLFIRI regimen. Conclusions: The FOLFIRI regimen was demonstrated to have a moderate antitumor activity with acceptable toxicity profiles, and tend to show more favorable outcome for patients with good ECOG PS. No significant financial relationships to disclose.


2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 9517-9517
Author(s):  
Angela Di Giannatale ◽  
Kieran Mc Hugh ◽  
Nathalie Dias ◽  
Annick Devos ◽  
Birgit Geoerger ◽  
...  

9517 Background: Temozolomide and topotecan have shown activity in several pediatric cancers, including neuroblastoma. Resistance to alkylating agents due to MGMT expression, MMR deficiency or microsatellite instability may be overcome through the combination with topoisomerase I inhibitors. The combination of temozolomide and topotecan (TOTEM) was well tolerated and showed preliminary activity in children with neuroblastoma and glioma (Rubie et al, 2010). Methods: This multicenter, non-randomized, multi-cohort Phase II study included children with neuroblastoma according to a 2-stage Simon design, and patients with central nervous system (CNS) and extra-cranial solid tumors in a descriptive design. Temozolomide was administered orally at 150 mg/m2 followed by topotecan at 0.75 mg/m2 intravenously for 5 consecutive days every 28 days. The main endpoint was objective response (OR), i.e., Complete or Partial Response (CR+PR), evaluated after 2 cycles according to WHO criteria, or INRC criteria for neuroblastoma patients with mIBG-positive lesions, by an independent radiological review. Independent review of mIBG imaging is pending. Results: 103 patients, median age 9.4 years (range 1-21), were treated between June 2009 and May 2011 in 18 centers: 38 neuroblastoma, 33 CNS tumors and 32 other solid tumors. Overall 420 cycles were administered (median 3 per patient; range 1-12). Grade 3 or 4 neutropenia was frequent (55% courses), though only 6% of patients developed febrile neutropenia. In the neuroblastoma cohort, 1 CR and 7 PR were observed, leading to an estimated OR rate of 21% (95%CI, 10-37%). Additionally 22 patients had disease stabilization (SD), leading to an overall tumor control (CR+PR+SD) of 79% (63-90%), and a 12-month progression-free survival rate of 47% (31-64%). Overall, 17/102 evaluable patients achieved an OR (17%, 10-25%), with 1 CR and 3 PR in 9 medulloblastoma (44%, 14-79%), 2 PR in 4 PNET, 1 PR in 12 malignant glioma, and 2 PR in 9 RMS. Conclusions: Temozolomide-topotecan combination results in significant tumor control in children with neuroblastoma and medulloblastoma/PNET with favorable toxicity profile.


2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 8000-8000 ◽  
Author(s):  
John Leonard ◽  
Sin-Ho Jung ◽  
Jeffrey L. Johnson ◽  
Nancy Bartlett ◽  
Kristie A. Blum ◽  
...  

8000 Background: Lenalidomide (L) and rituximab (R) are active as single agents in follicular (FL) and other B-cell lymphomas, although combination strategies have not been previously assessed in a randomized fashion. Methods: CALGB 50401 is a randomized phase II study, initially designed to evaluate 3 regimens: R alone (375 mg/m2 weekly x 4), L alone (15 mg cycle 1, then escalated to 20 mg cycles 2-12, administered days 1-21 q 28 days x 12 cycles) or the combination of L+ R (other 2 arms combined). The R alone arm was discontinued due to slow accrual with 3 enrolled subjects. Eligibility included recurrent FL, prior therapy with rituximab alone or in combination, and TTP of ≥ 6 months from last rituximab dose. Prophylactic ASA or LMW heparin was recommended for patients at high risk for thrombosis. Results: Of 94 pts registered to L or LR, 89 (45 L and 44 LR) received at least one dose and had adequate data for analysis. Baseline characteristics include median age 63 (range 34-85) and 60% with intermediate- or high-risk FLIPI. Grade 3-4 adverse events (AE) were most commonly neutropenia (16% L,19% LR), fatigue (9% L, 14% LR) and thrombosis (16% - 7 pts L, 4% - 2 pts LR, p=0.158), and overall were seen in 49% (L) and 52% (LR) with 9% grade 4 in each arm. The full regimen was completed in 33% (L) and 59% (LR) of patients, with the difference due to more progressions or non-responders in the L group. In both arms about 19% of subjects discontinued therapy early due to AEs and dose intensity was over 80%. Objective response rates are L - 49% (13% CR) and LR - 75% (32% CR). With a median follow-up of 1.5 years (range 0.1- 3.6 years), median EFS is 1.2 years (L) and 2.0 years (LR), p=0.0063, log-rank test. Conclusions: Lenalidomide + rituximab is more active than lenalidomide alone in patients with recurrent FL with similar toxicity. A trend toward lower thrombosis risk with LR may relate to greater anti-tumor efficacy. The LR regimen warrants further study in FL including as a backbone for addition of novel agents in relapsed and frontline settings.


2020 ◽  
Vol 38 (15_suppl) ◽  
pp. 6529-6529
Author(s):  
Wim van Boxtel ◽  
Maike Uijen ◽  
Chantal Driessen ◽  
Sjoert Pegge ◽  
Stefan M. Willems ◽  
...  

6529 A phase II study on the efficacy and toxicity of cabozantinib in recurrent/metastatic salivary gland cancer patients. Background: Because c-MET and VEGFR are often overexpressed in salivary gland cancer (SGC), this study evaluated the efficacy and safety of cabozantinib in recurrent/metastatic (R/M) SGC pts. Methods: A single center, single arm, phase II study was conducted. Immunohistochemical c-MET positive (H-score ≥10) R/M SGC pts were included in 3 cohorts: adenoid cystic carcinoma (ACC), salivary duct carcinoma (SDC), and other SGCs. Objective growth or complaints due to the disease were required before inclusion in the ACC and other SGC cohort. No prior systemic treatments were required. Pts started 60 mg cabozantinib tablets OD. Primary endpoint was the objective response rate (ORR). A Simon two-stage design was used. In case of ≥1 objective response in the first 9 pts/cohort, 8 additional pts would be included in the cohort. Results: In total 25 pts were included from Sep. 2018 until premature closure due to severe toxicity in Nov. 2019. Median age was 56 years (range 49-72), prior treatments included: primary tumor resection ( n=19), radiotherapy ≥50Gy ( n=24), systemic therapy ( n=10; adjuvant in 2 pts, palliative in 8 pts). Six pts had grade 3 ( n=4), grade 4 ( n=1), or grade 5 ( n=1) wound/fistula complications, occurring at a median of 7.2 mths on cabozantinib (range 2.1-12.8). This resulted in a severe wound complication rate of 32% in 19 pts on treatment for ≥2 mths. Remarkably, 4 out of 6 pts developed this complication in the area exposed to high-dose Rx; 2/4 had a pre-existing fistula in this area. Median interval between Rx and start of cabozantinib was 71.3 mths (range 10.6-94.7). Other grade ≥3 adverse events in >1 pt were: hypertension (5 pts), diarrhoea (2 pts) and dehydration (2 pts). Current median follow-up is 6.8 mths. The ORR was 6% (1/17 pts) in the ACC cohort, 20% (1/5 pts) in the SDC cohort, and 0% (0/3 pts) in other SGC pts; median PFS is 12.6 mths (95% CI 6.8 – 18.4 mths), 9.0 mths (insufficient events for 95% CI), and 6.9 mths (95% CI 0 – 15.2 mths), respectively. Median OS is not reached in any cohort. Conclusions: This phase II study on cabozantinib in R/M SGC pts demonstrated severe wound and fistula complications in 32% of pts on treatment for ≥2 mths, mostly (4/6 pts) within the radiotherapy field. Because of this toxicity the study was closed prematurely. Furthermore, cabozantinib showed minimal clinical activity in SGC pts. Research funding: Ipsen Pharmaceuticals Clinical trial information: NCT03729297 .


Sign in / Sign up

Export Citation Format

Share Document