TY - JOUR
T1 - Delaying Postoperative Radiotherapy in Low-Grade Esthesioneuroblastoma
T2 - Is It Worth the Wait?
AU - Kiyofuji, Satoshi
AU - Agarwal, Vijay
AU - Hughes, Joshua D.
AU - Foote, Robert L.
AU - Janus, Jeffrey R.
AU - Moore, Eric J.
AU - Giannini, Caterina
AU - Link, Michael J.
AU - Van Gompel, Jamie J.
N1 - Publisher Copyright:
© 2021 Thieme Medical Publishers, Inc.. All rights reserved.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Background Consensus in timing of radiotherapy is yet to be established in esthesioneuroblastoma (ENB). Objective This study was aimed to investigate if planned adjuvant radiotherapy improves tumor control after complete margin negative resection of low Hyams' grade (1 or 2) ENB. Methods A retrospective review of patients with pathologically confirmed negative margin resection of Kadish's stage B or C and Hyams' grade 1 and 2 ENBs was conducted. Seventeen patients meeting the criteria were divided into the following two groups for cohort study: (1) those who underwent planned immediate postoperative adjuvant radiotherapy (IR group) and (2) those who did not (delayed radiotherapy [DR] group). Results The IR group included nine patients (Kadish's stage B in one and stage C in eight; Hyams' grade 1 in two and grade 2 in seven). Mean follow-up was 140.8 months. Seven patients (78%) had disease progression (DP) at a median of 88 months (four with cervical lymph node metastasis [CLNM], one with distant metastasis, and two with both local recurrence and CLNM). One patient experienced frontal lobe abscess. The DR group included eight patients (Kadish's stage B in six and stage C in two; all Hyams' grade 2). Mean follow-up was 123.3 months. Four (50%) patients who developed DP (all local recurrence) were salvaged with surgery and adjuvant radiotherapy at a median of 37.5 months. There was no statistically significant difference in DP rate (p = 0.23), time to DP (p = 0.26), or the local tumor control rate (p = 0.23). Conclusion In our limited cohort, immediate postoperative radiotherapy did not demonstrate superiority in tumor control, although risk of radiotherapy toxicity appears low.
AB - Background Consensus in timing of radiotherapy is yet to be established in esthesioneuroblastoma (ENB). Objective This study was aimed to investigate if planned adjuvant radiotherapy improves tumor control after complete margin negative resection of low Hyams' grade (1 or 2) ENB. Methods A retrospective review of patients with pathologically confirmed negative margin resection of Kadish's stage B or C and Hyams' grade 1 and 2 ENBs was conducted. Seventeen patients meeting the criteria were divided into the following two groups for cohort study: (1) those who underwent planned immediate postoperative adjuvant radiotherapy (IR group) and (2) those who did not (delayed radiotherapy [DR] group). Results The IR group included nine patients (Kadish's stage B in one and stage C in eight; Hyams' grade 1 in two and grade 2 in seven). Mean follow-up was 140.8 months. Seven patients (78%) had disease progression (DP) at a median of 88 months (four with cervical lymph node metastasis [CLNM], one with distant metastasis, and two with both local recurrence and CLNM). One patient experienced frontal lobe abscess. The DR group included eight patients (Kadish's stage B in six and stage C in two; all Hyams' grade 2). Mean follow-up was 123.3 months. Four (50%) patients who developed DP (all local recurrence) were salvaged with surgery and adjuvant radiotherapy at a median of 37.5 months. There was no statistically significant difference in DP rate (p = 0.23), time to DP (p = 0.26), or the local tumor control rate (p = 0.23). Conclusion In our limited cohort, immediate postoperative radiotherapy did not demonstrate superiority in tumor control, although risk of radiotherapy toxicity appears low.
KW - craniofacial resection
KW - esthesioneuroblastoma
KW - intensity-modulated radiation therapy
KW - olfactory neuroblastoma
KW - surgical treatment
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U2 - 10.1055/s-0040-1708854
DO - 10.1055/s-0040-1708854
M3 - Article
AN - SCOPUS:85111076960
SN - 2193-634X
VL - 82
SP - E166-E171
JO - Journal of Neurological Surgery, Part B: Skull Base
JF - Journal of Neurological Surgery, Part B: Skull Base
ER -