Garces YI, Okuno SH, Schild SE, Mandrekar SJ, Bot BM, Martens JM, Wender DB, Soori GS, Moore DF, Kozelsky TF, Jett JR. Phase I North Central Cancer Treatment Group Trial-N9923 of escalating doses of twice-daily thoracic radiation therapy with amifostine and with alternating chemotherapy in limited stage small-cell lung cancer.
Int J Radiat Oncol Biol Phys 2007;
67:995-1001. [PMID:
17336213 DOI:
10.1016/j.ijrobp.2006.10.034]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2006] [Revised: 10/02/2006] [Accepted: 10/03/2006] [Indexed: 11/30/2022]
Abstract
PURPOSE
The primary goal was to identify the maximum tolerable dose (MTD) of thoracic radiation therapy (TRT) that can be given with chemotherapy and amifostine for patients with limited-stage small-cell lung cancer (LSCLC).
METHODS AND MATERIALS
Treatment began with two cycles of topotecan (1 mg/m(2)) Days 1 to 5 and paclitaxel (175 mg/m(2)) Day 5 (every 3 weeks) given before and after TRT. The TRT began at 6 weeks. The TRT was given in 120 cGy fractions b.i.d. and the dose escalation (from 4,800 cGy, dose level 1, to 6,600 cGy, dose level 4) followed the standard "cohorts of 3" design. The etoposide (E) (50 mg/day) and cisplatin (C) (3 mg/m(2)) were given i.v. before the morning TRT and amifostine (500 mg/day) was given before the afternoon RT. This was followed by prophylactic cranial irradiation (PCI). The dose-limiting toxicities (DLTs) were defined as Grade > or =4 hematologic, febrile neutropenia, esophagitis, or other nonhematologic toxicity, Grade > or =3 dyspnea, or Grade > or =2 pneumonitis.
RESULTS
Fifteen patients were evaluable for the Phase I portion of the trial. No DLTs were seen at dose levels 1 and 2. Two patients on dose level 4 experienced DLTs: 1 patient had a Grade 4 pneumonitis, dyspnea, fatigue, hypokalemia, and anorexia, and 1 patient had a Grade 5 hypoxia attributable to TRT. One of 6 patients on dose level 3 had a DLT, Grade 3 esophagitis. The Grade > or =3 toxicities seen in at least 10% of patients during TRT were esophagitis (53%), leukopenia (33%), dehydration (20%), neutropenia (13%), and fatigue (13%). The median survival was 14.5 months.
CONCLUSION
The MTD of b.i.d. TRT was 6000 cGy (120 cGy b.i.d.) with EP and amifostine.
Collapse