Seven-Year Follow-Up of the Phase III KEYNOTE-006 Study: Pembrolizumab Versus Ipilimumab in Advanced Melanoma.

Clinical trials frequently include multiple end points that mature at different times. The initial report, typically based on the primary end point, may be published when key planned co-primary or secondary analyses are not yet available. Clinical Trial Updates provide an opportunity to disseminate additional results from studies, published in JCO or elsewhere, for which the primary end point has already been reported.Immune checkpoint inhibitors have led to unprecedented prolongation of overall survival (OS) for patients with advanced melanoma. Five-year follow-up of KEYNOTE-006 showed pembrolizumab prolonged survival versus ipilimumab. Efficacy results with 7-year follow-up are presented. At data cutoff (April 19, 2021), median follow-up was 85.3 months (range, 0.03-90.8 months). Median OS was 32.7 months for pembrolizumab versus 15.9 months for ipilimumab (hazard ratio [HR], 0.70; 95% CI, 0.58 to 0.83); 7-year OS was 37.8% and 25.3%, respectively. OS HRs favored pembrolizumab regardless of BRAF status or prior BRAF/MEK-inhibitor treatment and prognostic characteristics (elevated lactate dehydrogenase, large tumor size, and brain metastasis). Median modified progression-free survival (mPFS) was 9.4 months for pembrolizumab versus 3.8 months for ipilimumab; 7-year mPFS was 23.8% and 13.3%, respectively. In patients who completed ≥94 weeks of pembrolizumab, the 5-year OS was 92.9% and the 5-year mPFS was 70.1%. The objective response rate with second-course pembrolizumab (n = 16) was 56% (95% CI, 30 to 80) and the 2-year mPFS was 62.5%. These findings confirm that pembrolizumab provides long-term survival benefit in advanced melanoma.

Phase II trial of combined modality therapy with myeloid growth factor support in patients with locally advanced non-small cell lung cancer.

INTRODUCTION: To evaluate the efficacy and safety of myeloid growth factors in patients with locally advanced non-small cell lung cancer treated with combined modality therapy (CMT). METHODS: Patients with stage IIIA/B non-small cell lung cancer, performance status 0 to 1, and forced expiratory volume in 1 second > or =1.5, received cisplatin 75 mg/m(2) on day 1 + etoposide 80 mg/m(2) on days 1 to 3 every 3 weeks for 2 cycles concurrent with thoracic radiotherapy to 61 Gy. filgrastim 5 mcg/kg/d was administered for 10 days beginning on day 4 of each chemotherapy cycle. Patients without progression received docetaxel 75 mg/m(2) every 21 days for 3 cycles with peg-filgrastim 6 mg on day 2. The primary end point was a 50% reduction in the incidence of grade (3/4) neutropenia compared with historical controls. RESULTS: A total of 26 eligible patients were enrolled. Median age was 67, 76% were men, and 58% had stage IIIA. Gr3/4 neutropenia during CMT was 19.2% and 3.8%, respectively. There were no episodes of febrile neutropenia. Gr4 thrombocytopenia was 15.4% with 2 patients requiring transfusions. Gr3 esophagitis was noted in 7.7% and Gr (3/4) pneumonitis in 21.6% of patients. No patients died of treatment-related toxicities. Dose reductions/delays occurred in 3.8% of patients during CMT. Median progression-free survival and median survival were 10.7 and 27.6 months, respectively. The 1- and 2-year survival rates were 61.5% and 46.2%, respectively. CONCLUSIONS: Our data suggest that the addition of filgrastim to CMT is safe and effective. The rate of grade (3/4) toxicities, including febrile neutropenia, compares favorably to previous trials using a similar regimen. Dose intensity is maintained. This strategy merits further evaluation.

The faces of mast cell disease: bone marrow infiltrates in 3 patients with systemic mastocytosis.

The clinical spectrum of mast cell disease ranges from relatively innocuous and histologically subtle urticarial skin lesions to an aggressive and fatal leukemic form of mast cell proliferation. Not surprisingly, mast cell infiltrates may show significant microscopic heterogeneity, particularly in the bone marrow, the most common site of involvement in systemic mastocytosis (SM). Herein, 3 cases are presented to illustrate the clinical and morphologic heterogeneity of mast cell disease: the first patient, with long standing urticaria pigmentosa, developed anemia and thrombocytopenia; the second patient presented with a pathologic fracture; and the third patient was suspected to have refractory anemia. Upon bone marrow examination, all 3 patients showed mast cell infiltration with distinct morphologic features and all met the WHO criteria for aggressive systemic mastocytosis. Histochemical methods continue to play a role in the identification of mast cells, with some limitations depending on the degree of differentiation of the mast cells and tissue processing methods. Immunohistochemistry has contributed to the identification of mast cells. Coexpression of CD117 and CD25, as well as expression of the more specific immunohistochemical marker tryptase, is seen in systemic SM. The latter may also be employed as a serum marker in the diagnosis and follow-up of patients with SM. The mast cells, in the majority adults with SM, have somatic point mutations of KIT.