Phase II study of capecitabine-based concomitant chemoradiation followed by durvalumab as a neoadjuvant strategy in locally advanced rectal cancer: the PANDORA trial

BACKGROUND

This study investigated the efficacy of chemoradiotherapy (CRT) followed by durvalumab as neoadjuvant therapy of locally advanced rectal cancer.

PATIENTS AND METHODS

The PANDORA trial is a prospective, phase II, open-label, single-arm, multicenter study aimed at evaluating the efficacy and safety of preoperative treatment with durvalumab (1500 mg every 4 weeks for three administrations) following long-course radiotherapy (RT) plus concomitant capecitabine (5040 cGy RT in 25-28 fractions over 5 weeks and capecitabine administered at 825 mg/m2 twice daily). The primary endpoint was the pathological complete response (pCR) rate; secondary endpoints were the proportion of clinical complete remissions and safety. The sample size was estimated assuming a null pCR proportion of 0.15 and an alternative pCR proportion of 0.30 (α = 0.05, power = 0.80). The proposed treatment could be considered promising if ≥13 pCRs were observed in 55 patients (EudraCT: 2018-004758-39; NCT04083365).

RESULTS

Between November 2019 and August 2021, 60 patients were accrued, of which 55 were assessable for the study's objectives. Two patients experienced disease progression during treatment. Nineteen out of 55 eligible patients achieved a pCR (34.5%, 95% confidence interval 22.2% to 48.6%). Regarding toxicity related to durvalumab, grade 3 adverse events (AEs) occurred in four patients (7.3%) (diarrhea, skin toxicity, transaminase increase, lipase increase, and pancolitis). Grade 4 toxicity was not observed. In 20 patients (36.4%), grade 1-2 AEs related to durvalumab were observed. The most common were endocrine toxicity (hyper/hypothyroidism), dermatologic toxicity (skin rash), and gastrointestinal toxicity (transaminase increase, nausea, diarrhea, constipation).

CONCLUSION

This study met its primary endpoint showing that CRT followed by durvalumab could increase pCR with a safe toxicity profile. This combination is a promising, feasible strategy worthy of further investigation.

Irinotecan Hepatic Arterial Infusion Chemotherapy for Hepatic Metastases from Colorectal Cancer: Results of a Phase I Clinical Study

Background

Hepatic arterial infusion chemotherapy is a promising approach in liver metastases from colorectal cancer, but chemical hepatitis, biliary sclerosis, arterial thrombosis and right upper quadrant pain are limiting factors. Irinotecan (CPT-11) is an active drug in colorectal cancer. We planned a short hepatic arterial infusion of CPT-11 to describe the toxicity, to determine the dose-limiting toxicity, and to define the doses of CPT-11 to be recommended for phase II studies.

Patients and Methods

Fourteen patients with a median liver substitution of 30% (10-60%) were enrolled. All patients received hepatic arterial infusion chemotherapy with CPT-11 on an outpatient basis every 3 weeks as a short, 30-min infusion.

Results

At 240 mg/m2, 2 of 4 patients experienced grade 4 diarrhea and neutropenia, and 3 of them also reported grade 4 abdominal pain of the right upper quadrant. The maximum tolerated dose was reached at 240 mg/m2. The recommended doses of CPT-11 for phase II studies is 200 mg/m2, given every 3 weeks.

Conclusions

CPT-11 presents a low hepatic toxic profile and could be considered a new active drug, suitable for hepatic arterial infusion in liver metastases from colorectal cancer.

Results with salvage chemotherapy with high dose carboplatin + etoposide and peripheral blood stem cell transplant in male choriocarcinoma

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Background: Choriocarcinoma in males is seen usually as a small component of a mixed germ cell tumor. Pure choriocarcinoma accounts for a poor prognosis, usually presenting with high level of human chorionic gonadotropin (hCG > 50,000 mIU/ml) and with pulmonary and non-pulmonary visceral metastases. Results with salvage chemotherapy in the past have been very poor with very few long-term survivors. Methods: Retrospective review of 184 germ cell patients treated with salvage high dose chemotherapy (HDCT) at Indiana University between 2–96 and 12–04 was presented (Proc Amer Soc Clin Oncol 24:228, abstract 4549, 2006). Thirteen of these patients had pure choriocarcinoma of the testis or choriocarcinoma syndrome (normal testes by palpation and ultrasound, normal serum alpha-fetoprotein, advanced hematogenous metastases, high level of hCG). Before HDCT, all the patients were treated with one or two regimens of standard cisplatin combination chemotherapy. HDCT regimen consisted of carboplatin 700 mg/m2 and etoposide 750 mg/m2 i.v. given for 3 consecutive days. A second course was given after hematologic recovery. Results: Toxicity was previously described (JCO 18:3346, 2000).The median survival was 19 months (range 5–90 months). Six patients (46%) are alive and continuously disease-free (cNED) with a median follow-up of 37 months (range 19–75). One additional patient is currently NED following subsequent chemotherapy and surgery. 3 of 7 patients with pure choriocarcinoma are cNED and 3 of 6 with choriocarcinoma syndrome are cNED. Six of 10 patients receiving HDCT as initial salvage therapy are cNED compared to 1 of 3 as third-line treatment. Conclusions: Salvage HDCT offers long-term disease-free survival and potential cure in patients with pure choriocarcinoma or choriocarcinoma syndrome that progressed after standard cisplatin combination chemotherapy.

No significant financial relationships to disclose.

Salvage chemotherapy with high-dose carboplatin plus etoposide and autologous peripheral blood stem cell transplant in male pure choriocarcinoma: a retrospective analysis of 13 cases

Choriocarcinoma of testes is a very rare tumor with poor prognosis, usually presenting with high serum level of human chorionic gonadotropin (hCG>50,000 mIU/ml) and advanced hematogenous metastases. Data with salvage chemotherapy has been sparse, with few long-term survivors. Between April 1996 and October 2004, 184 patients with germ cell tumor were treated at Indiana University with salvage high-dose chemotherapy (HDCT) with autologous peripheral blood stem cell transplant. Thirteen had pure choriocarcinoma or choriocarcinoma syndrome (normal testes by palpation and ultrasound, normal serum alpha-fetoprotein, advanced hematogenous metastases and high level hCG). All patients had progressed following one or two lines of cisplatin combination therapy. HDCT regimen was carboplatin 700 mg/m(2) and etoposide 750 mg/m(2) intravenously given for 3 consecutive days. A second course was given after hematopoietic recovery, usually 3-4 weeks later. The median survival was 19 months (range 5-90). Six patients (46%) are alive and continuously disease free (cNED) at a median follow-up of 37 months (range 19-75). One additional patient who relapsed after HDCT and was treated with third line chemotherapy followed by two surgical resections of choriocarcinoma is currently alive NED at +90 months from HDCT. Long-term disease-free survival and potential cure is possible with HDCT in choriocarcinoma patients that progressed after standard cisplatin combination therapy.

First-line high-dose chemotherapy for patients with poor prognosis extragonadal germ cell tumors: the experience of the European Bone Marrow Transplantation (EBMT) Solid Tumors Working Party

Extragonadal germ cell tumors are classified according to the staging system of the International Germ Cell Cancer Collaborative Group (IGCCCG). The 5-year overall and disease-free survival rates for poor prognosis patients are 41 and 48%, respectively after standard-dose chemotherapy. We report the experience of the EBMT Solid Tumours Working Party (STWP) with first-line HDCT with hematopoietic progenitor cell support (HPCS) in patients with poor prognosis extragonadal nonseminomatous germ cell tumor (NSGCT). Between 1990 and 2001, 22 extragonadal NSGCT patients (21 M, 1 F), median age 30 years (range 17-52) were treated with first-line HDCT with HPCS. Primary site was mediastinum in 11 patients, retroperitoneum in 10, and unknown in one. The Carbopec regimen, consisting of high doses of carboplatin, etoposide, and cyclophosphamide, was used in most cases (12 patients). No treatment-related deaths occurred. No patient developed myelodysplasia or a secondary leukemia. In total, 17 of 22 patients (77%) achieved complete remission. At a median follow-up of 50 months (range 26-132), 15 patients (68%) are alive disease-free. The survival rates of patients with poor prognosis extragonadal NSGCT treated with first-line HDCT in the EBMT STWP experience appear higher than that expected according to the IGCCCG classification.

Second-line high-dose chemotherapy in patients with mediastinal and retroperitoneal primary non-seminomatous germ cell tumors: the EBMT experience

BACKGROUND

Results of second-line chemotherapy in patients with extragonadal non-seminomatous germ cell tumor (NSGCT) appear inferior to results in testicular NSGCT. Patients with retroperitoneal NSGCT achieve a comparable long-term survival rate of 30%, but the salvage rates of patients with mediastinal primary are less than 10%. We conducted a retrospective analysis on patients with mediastinal and retroperitoneal NSGCT treated with second-line high-dose chemotherapy (HDCT) registered with the European Group for Blood and Marrow Transplantation (EBMT).

PATIENTS AND METHODS

Between 1987 and 1999, 59 registered patients with retroperitoneal (n=37) and mediastinal (n=22) primary NSGCT, median age 28 years (range 18-60), were treated with second-line HDCT. All had received cisplatin-containing chemotherapy as first-line treatment.

RESULTS

Toxic death occurred in three cases (5%). With a median follow-up of 58 months (range 14-114), 18/59 patients (30%) continue to be disease-free. Of three patients who had a disease recurrence after HDCT, one patient achieved a disease-free status with further chemotherapy and surgery. In total, 19 patients (32%) are currently disease-free. Sixteen of 37 patients (43%) with retroperitoneal NSGCT, and three of 22 patients (14%) with mediastinal NSGCT are currently alive and disease-free.

CONCLUSIONS

Second-line HDCT might represent a possible option for patients with retroperitoneal primary NSGCT. New salvage strategies are needed for patients with mediastinal NSGCT.

Long-term follow-up of patients with poor prognosis germ cell tumor treated with early high-dose chemotherapy with hematopoietic progenitor cell support: a single-center experience

The 5-year overall survival rate of patients with germ cell tumor (GCT) with poor prognosis, according to the International Germ Cell Cancer Collaborative Group (IGCCCG) classification, is 48% after standard-dose chemotherapy and surgery, if necessary. Two recent studies have showed that early high-dose chemotherapy (HDCT) with hematopoietic progenitor cell support (HPCS) may induce a 2-year overall survival rate of 78% in these patients. We report the long-term results of the experience at the Department of Oncology in Ravenna with early HDCT and HPCS in GCT patients with poor prognosis (IGCCCG criteria). Between 1987 and 2002, 18 poor prognosis GCT patients (17 M, one F), median age 24.5 years (range, 17-52), were treated with early HDCT with HPCS. In total, (67%) patients achieved a complete remission and they are continuously disease-free at a median follow-up of 9.2 years (range, 1.7-16.2). One treatment-related death occurred. No patient developed myelodysplasia or a secondary leukemia. This is notably the longest follow-up reported in patients having received HDCT in this setting. No patient achieving a complete remission relapsed. The role of HDCT in poor prognosis GCT will be defined from the ongoing phase III randomized trials.