Pembrolizumab in relapsed or refractory primary mediastinal large B-cell lymphoma: final analysis of KEYNOTE-170.

Previous analyses of the phase 2 KEYNOTE-170 (NCT02576990) study demonstrated effective antitumor activity and acceptable safety of pembrolizumab 200 mg given every 3 weeks for up to 35 cycles (∼2 years) in patients with relapsed/refractory (R/R) primary mediastinal B-cell lymphoma (PMBCL) whose disease progressed after or who were ineligible for autologous stem cell transplantation. The end points included objective response rate (ORR), progression-free survival (PFS), and duration of response (DOR) according to the investigator per 2007 Response Criteria; overall survival (OS); and safety. In this final analysis, median duration of follow-up was 48.7 months (range, 41.2-56.2). The ORR was 41.5% (complete response, 20.8%; partial response, 20.8%). The median DOR was not reached; no patients who achieved a complete response progressed at the data cutoff. The median PFS was 4.3 months; the 4-year PFS rate was 33.0%. The median OS was 22.3 months; the 4-year OS rate was 45.3%. At the data cutoff, 30 patients (56.6%) had any-grade treatment-related adverse events (AEs); the most common were neutropenia, asthenia, and hypothyroidism. Grade 3/4 treatment-related AEs occurred in 22.6% of the patients; no grade 5 AEs occurred. After 4 years of follow-up, pembrolizumab continued to provide durable responses, with promising trends for long-term survival and acceptable safety in R/R PMBCL.

Mutational Landscape and Actionable Target Rates on Advanced Stage Refractory Cancer Patients: A Multicenter Chilean Experience.

Major advances in sequencing technologies and targeted therapies have accelerated the incorporation of oncology into the era of precision medicine and "biomarker-driven" treatments. However, the impact of this approach on the everyday clinic has yet to be determined. Most precision oncology reports are based on developed countries and usually involve metastatic, hard-to-treat or incurable cancer patients. Moreover, in many cases race and ethnicity in these studies is commonly unreported and real-world evidence in this topic is scarce. Herein, we report data from a total of 202 Chilean advanced stage refractory cancer patients. Retrospectively, we collected patient data from NGS tests and IHC in order to determine the proportion of patients that would benefit from targeted treatments. Overall >20 tumor types were included in our cohort and 37% of patients (n = 74) displayed potentially actionable alterations, including on-label, off-label and immune checkpoint inhibitor recommendations. Our findings were in-line with previous reports such as the cancer genome atlas (TCGA). To our knowledge, this is the first report of its kind in Latin America delivering real-world evidence to estimate the percentage of refractory tumor patients that might benefit from precision oncology. Although this approach is still in its infancy in Chile, we strongly encourage the implementation of mutational tumor boards in our country in order to provide more therapeutic options for advanced stage refractory patients.

Epidemiological and clinical characteristics and outcome of monoclonal gammopathy of renal significance-related lesions in Latin America.

BACKGROUND: Monoclonal gammopathy of renal significance (MGRS)-related lesions are infrequent entities. There are no publications on these disorders in Latin America (LA). The aim of this study was to describe epidemiological and clinical characteristics of these patients in LA. METHODS: We performed a multicentre retrospective study. Patients with diagnosis of MGRS between 2012 and 2018 were included. Epidemiological and clinical data were collected from clinical records. RESULTS: Twenty-seven patients from Chile, Argentina, Ecuador and Uruguay were included. Half debuted with a nephrotic syndrome, and 32% required dialysis. Proliferative glomerulonephritis with monoclonal immunoglobulin deposits was found in 33%, amyloidosis in 26% and monoclonal immunoglobulin deposition disease also in 26%. The immunoglobulin most frequently found in renal biopsies was IgG kappa. In 67% a paraprotein was found. Twenty patients received an anti-plasma cell regimen, and 3 a rituximab-based regimen (IgM-MGRS). Renal response (RR) was achieved in 56%. Early treatment (≤3 months) was associated with higher RR (75% vs 43%). Three patients relapsed within 21.5 months, and 3 progressed: 1 to multiple myeloma, 1 to systemic amyloidosis and another to systemic light-chain deposition disease. Two patients died, both due to infection during induction treatment. CONCLUSION: There was a higher than expected frequency of patients requiring dialysis. The most common MGRS-related lesion was PGNMD. Early treatment was associated with better response. As a rare disease, increasing awareness and promoting early diagnosis are necessary in LA to improve outcomes. SUMMARY AT A GLANCE A collection of 27 cases of MGRS from Latin America with information on epidemiology, clinical characteristics, treatment and outcome of patients diagnosed of MGRS-related renal lesions.

Mutación del gen KRAS en el cáncer de colon y recto / KRAS gene mutation in colorectal cancer

Background: KRAS oncogene is involved in colorectal carcinogenesis in 22 to 45% of cases. Aim: To determine the frequency, types and distribution of KRAS mutations in colorectal cancer. Material and Methods: KRAS mutations studies were carried out in primary tumors and metastases of colo-rectal cancer from 56 women aged 60 ± 14 years and 53 men aged 61 ± 11 years. Formalin fixed and paraffin embedded tissue samples were evaluated using RFLP (Restriction Fragment Length Polymorphism) and direct sequencing. Results: Primary tumors were located in the colon and rectum in 82 (75.2%) and 24 cases (20%), respectively. In three cases the extraction site of the tumor sample was unknown. In 46 cases (42.2%) KRAS mutations were demonstrated. The main point mutations were located in codon 12 (80.4%), G12D (39.1%), G12V (24.2%), G12S (6.5%), G12A (4.3%); G12C (4.3%), G12R (2.1%) and 19.6% at codon 13 (G13D). No differences were demonstrated in the frequency and distribution of mutations by gender, age, primary versus metastatic tumors or tumor location. Conclusions: In this series, 42% of colorectal cancer tissue samples had KRAS mutations. Their frequency and distribution are similar to those reported in the literature, except for G12C mutation.

[KRAS gene mutation in colorectal cancer]. / Mutación del gen KRAS en el cáncer de colon y recto.

BACKGROUND: KRAS oncogene is involved in colorectal carcinogenesis in 22 to 45% of cases. AIM: To determine the frequency, types and distribution of KRAS mutations in colorectal cancer. MATERIAL AND METHODS: KRAS mutations studies were carried out in primary tumors and metastases of colo-rectal cancer from 56 women aged 60 ± 14 years and 53 men aged 61 ± 11 years. Formalin fixed and paraffin embedded tissue samples were evaluated using RFLP (Restriction Fragment Length Polymorphism) and direct sequencing. RESULTS: Primary tumors were located in the colon and rectum in 82 (75.2%) and 24 cases (20%), respectively. In three cases the extraction site of the tumor sample was unknown. In 46 cases (42.2%) KRAS mutations were demonstrated. The main point mutations were located in codon 12 (80.4%), G12D (39.1%), G12V (24.2%), G12S (6.5%), G12A (4.3%); G12C (4.3%), G12R (2.1%) and 19.6% at codon 13 (G13D). No differences were demonstrated in the frequency and distribution of mutations by gender, age, primary versus metastatic tumors or tumor location. CONCLUSIONS: In this series, 42% of colorectal cancer tissue samples had KRAS mutations. Their frequency and distribution are similar to those reported in the literature, except for G12C mutation.

Clinical benefit with docetaxel plus fluorouracil and cisplatin compared with cisplatin and fluorouracil in a phase III trial of advanced gastric or gastroesophageal cancer adenocarcinoma: the V-325 Study Group.

PURPOSE: For patients with advanced gastric or gastroesophageal cancer (AGGEC) providing clinical benefit with improved palliation is highly desirable. However, a prospective evaluation of clinical benefit in AGGEC patients has never before been reported in a phase III setting. PATIENTS AND METHODS: In a multinational trial (V325), 445 patients were randomly assigned and treated with either docetaxel plus cisplatin and fluorouracil (DCF) or cisplatin and fluorouracil (CF). Clinical benefit was prospectively evaluated in this trial as a secondary end point. The primary measure for clinical benefit analysis was time to definitive worsening by one or more categories of Karnofsky performance status (KPS). Secondary clinical benefit end points included time to 5% definitive weight loss, time to definitive worsening of appetite by one grade, pain-free survival (defined as time to first appearance of pain), and time to first cancer pain-related opioid intake. Clinical benefit assessments were recorded at each clinic visit. RESULTS: Clinical benefit assessments were performed in more than 75% of patients throughout V325. DCF significantly prolonged time to definitive worsening of KPS compared with CF (median, 6.1 v 4.8 months; hazard ratio, 1.38; 95% CI, 1.08 to 1.76; log-rank P = .009). Although time to definitive weight loss and time to definitive worsening of appetite favored DCF, the results were not statistically significant. Pain-free survival and time to first cancer pain-related opioid intake were comparable. CONCLUSION: To our knowledge, V325 is the first phase III trial to report clinical benefit in AGGEC patients. Clinical benefit was assessed beyond protocol-specific chemotherapy. The addition of D to CF not only significantly improved clinical benefit but also improved quality of life, time to progression, and overall survival compared with CF.

Quality of life with docetaxel plus cisplatin and fluorouracil compared with cisplatin and fluorouracil from a phase III trial for advanced gastric or gastroesophageal adenocarcinoma: the V-325 Study Group.

PURPOSE: Therapy of patients with advanced gastric or gastroesophageal junction cancer should provide symptom relief and improve quality of life (QOL) because most patients are symptomatic at baseline. Using validated instruments, we prospectively assessed QOL (even after completion of protocol treatment) as one of the secondary end points of the V325 phase III trial. PATIENTS AND METHODS: Four hundred forty-five patients randomly received either docetaxel 75 mg/m(2) and cisplatin 75 mg/m(2) each on day 1 plus fluorouracil 750 mg/m(2)/d continuous infusion on days 1 to 5 every 3 weeks (DCF) or cisplatin 100 mg/m(2) on day 1 plus fluorouracil 1,000 mg/m(2)/d continuous infusion on days 1 to 5 every 4 weeks (CF). The European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire C30 (EORTC QLQ-C30) and, where available, the EuroQOL EQ-5D questionnaire were administered every 8 weeks from baseline until progression and then every 3 months. Time to definitive deterioration of QOL parameters was analyzed. RESULTS: The proportions of patients having assessable EORTC QLQ-C30 and EQ-5D questionnaires at baseline were 86.0% and 78.7% with DCF, respectively, and 89.7% and 92.8% with CF, respectively. Time to 5% deterioration of global health status (primary end point) significantly favored DCF over CF (log-rank test, P = .01). QOL was preserved longer for patients on DCF than those on CF for all time to deterioration analyses, demonstrating the statistical superiority of DCF compared with CF. CONCLUSION: V325 represents the largest trial with the longest prospectively controlled evaluations of QOL during protocol chemotherapy and follow-up in patients with advanced gastric or gastroesophageal junction cancer. In V325, advanced gastric or gastroesophageal junction cancer patients receiving DCF not only had statistically improved overall survival and time to tumor-progression, but they also had better preservation of QOL compared with patients receiving CF.

Phase III study of docetaxel and cisplatin plus fluorouracil compared with cisplatin and fluorouracil as first-line therapy for advanced gastric cancer: a report of the V325 Study Group.

PURPOSE: In the randomized, multinational phase II/III trial (V325) of untreated advanced gastric cancer patients, the phase II part selected docetaxel, cisplatin, and fluorouracil (DCF) over docetaxel and cisplatin for comparison against cisplatin and fluorouracil (CF; reference regimen) in the phase III part. PATIENTS AND METHODS: Advanced gastric cancer patients were randomly assigned to docetaxel 75 mg/m2 and cisplatin 75 mg/m2 (day 1) plus fluorouracil 750 mg/m2/d (days 1 to 5) every 3 weeks or cisplatin 100 mg/m2 (day 1) plus fluorouracil 1,000 mg/m2/d (days 1 to 5) every 4 weeks. The primary end point was time-to-progression (TTP). RESULTS: In 445 randomly assigned and treated patients (DCF = 221; CF = 224), TTP was longer with DCF versus CF (32% risk reduction; log-rank P < .001). Overall survival was longer with DCF versus CF (23% risk reduction; log-rank P = .02). Two-year survival rate was 18% with DCF and 9% with CF. Overall response rate was higher with DCF (chi2 P = .01). Grade 3 to 4 treatment-related adverse events occurred in 69% (DCF) v 59% (CF) of patients. Frequent grade 3 to 4 toxicities for DCF v CF were: neutropenia (82% v 57%), stomatitis (21% v 27%), diarrhea (19% v 8%), lethargy (19% v 14%). Complicated neutropenia was more frequent with DCF than CF (29% v 12%). CONCLUSION: Adding docetaxel to CF significantly improved TTP, survival, and response rate in gastric cancer patients, but resulted in some increase in toxicity. Incorporation of docetaxel, as in DCF or with other active drug(s), is a new therapy option for patients with untreated advanced gastric cancer.

Phase II multi-institutional randomized trial of docetaxel plus cisplatin with or without fluorouracil in patients with untreated, advanced gastric, or gastroesophageal adenocarcinoma.

PURPOSE: The purpose of this study was to define the contribution of docetaxel to combination chemotherapy in the outcome of patients with advanced gastric or gastroesophageal adenocarcinoma. We compared the overall response rate (ORR) and safety of docetaxel plus cisplatin (DC) with DC plus fluorouracil (DCF) to select either DC or DCF as the experimental treatment in the ensuing phase III part of trial V-325. PATIENTS AND METHODS: In this phase II randomized study, untreated patients with confirmed advanced gastric or gastroesophageal adenocarcinoma received either DCF (docetaxel 75 mg/m2, cisplatin 75 mg/m2 on day 1, and fluorouracil 750 mg/m2/d as continuous infusion on days 1 to 5) or DC (docetaxel 85 mg/m2 and cisplatin 75 mg/m2 on day 1) every 3 weeks. An independent data monitoring committee (IDMC) was to select one of the two regimens based primarily on ORR and safety profile. RESULTS: Of 158 randomly assigned patients, 155 (DCF, n = 79; DC, n = 76) received treatment. The confirmed ORR was 43% for DCF (n = 79) and 26% for DC (n = 76). Median time to progression was 5.9 months for DCF and 5.0 months for DC. Median overall survival time was 9.6 months for DCF and 10.5 months for DC. The most frequent grade 3 and 4 events per patient included neutropenia (DCF = 86%; DC = 87%) and GI (DCF = 56%; DC = 30%). CONCLUSION: Both regimens were active, but DCF produced a higher confirmed ORR than DC. Toxicity profiles of DCF were considered manageable. The IDMC chose DCF for the phase III part of V-325, which compares DCF with cisplatin plus fluorouracil.

Neoadjuvant combined chemotherapy followed by external whole pelvic irradiation in two cases of primary extranodal non-Hodgkin's lymphoma of the uterine cervix.

BACKGROUND: Primary extranodal lymphomas of the genital tract are rare. CASES: As there is no current consensus in its management, we present two further cases and their treatment with neoadjuvant chemotherapy, followed by radiation therapy. A radical hysterectomy with bilateral pelvic lymphadenectomy was performed after primary treatment in one case. Clinical response was complete in both cases and pathological response was documented in one. CONCLUSIONS: Complete response of these lymphoid neoplasms can be achieved by neoadjuvant chemotherapy followed by external irradiation.