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http://dx.doi.org/10.3857/jkstro.2009.27.4.189

Treatment and Prognosis for an Esthesioneuroblastoma over a 20-Year Period: Impact of Treatment Era  

Song, Chang-Hoon (Departments of Radiation Oncology, Seoul National University College of Medicine)
Kim, Il-Han (Departments of Radiation Oncology, Seoul National University College of Medicine)
Wu, Hong-Gyun (Departments of Radiation Oncology, Seoul National University College of Medicine)
Kim, Dong-Wan (Departments of Internal Medicine, Seoul National University College of Medicine)
Rhee, Chae-Seo (Departments of Otorhinolaryngology and Head and Neck Surgery, Seoul National University College of Medicine)
Publication Information
Radiation Oncology Journal / v.27, no.4, 2009 , pp. 189-193 More about this Journal
Abstract
Purpose: To report on the changes in the patterns of care and survival over time for esthesioneuroblastoma. Materials and Methods: We retrospectively analyzed 42 previously untreated and histologically confirmed esthesioneuroblastoma patients seen between March 1989 and June 2007. According to Kadish's classification, 3 patients (7%) were stage A, 6 (14%) at stage B, and 33 (79%) at stage C. Of the 33 Kadish C patients, 19 and 14 patients were treated from 1989 through 2000 and from 2001 through 2007, respectively. Treatment included surgical resection, radiotherapy, chemotherapy, or a combination of these methods. Chemotherapy was administered to 8 of 19 patients (42%) seen from 1989 through 2000, whereas all of the 14 patients seen from 2001 through 2007 received chemotherapy (p<0.001). No patient was treated by three-dimensional conformal radiotherapy (3D-CRT) from 1989 through 2000, however 8 of 14 patients (67%) seen from 2001 through 2007 underwent 3D-CRT (p<0.001). The median follow-up time for surviving patients was 6.5 years (range, 2.2~15.8 years). Results: The 5-year overall survival (OS) and progression-free survival (PFS) rates for the entire cohort were 53% and 39%, respectively. The 5-year OS was 100% for Kadish stages A or B and 39% for stage C (p=0.007). For patients with stage C disease who were treated from 1989 to 2000 and from 2001 to 2007, the 5-year OS rate was 26% and 59% (p=0.029), respectively and the corresponding 5-year PFS rate was 16% and 46% (p=0.001), respectively. Intraorbital extension and treatment era (1989~2000 vs. 2001~2007) were found as independent factors for OS and PFS in a multivariate analyses. Conclusion: The results of this study suggest that treatment era, which features a distinction in treatment modality and technique with the introduction of 3D-CRT, may be the cause of improved OS and PFS in Kadish stage C patients. To achieve better outcomes for patients with Kadish stage C, combined chemoradiotherapy, especially 3D-CRT, is recommended in addition to surgery.
Keywords
Esthesioneuroblastoma; Olfactory neuroblastoma; Radiotherapy; Chemotherapy;
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