BACKGROUND AND PURPOSE: To evaluate the treatment outcome in patients with locally recurrent nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiation therapy (IMRT). MATERIALS AND METHODS: Between October 2001 and May 2004, 31 patients with locally recurrent NPC received re-irradiation using IMRT. The rT classification distribution was 3 for rT1, 5 for rT2, 9 for rT3, and 14 for r T4. Median time from first course of radiotherapy to re-irradiation was 51 months. IMRT was performed using step-and-shoot method with nine 4-6 MV photon fields and median prescribed dose was 54 Gy (range: 50-60 Gy). Additional treatments included cisplatin-based induction chemotherapy in 68% and radiosurgery boost with a single dose which ranged from 8.5 to 12.5 Gy in 32%. Median follow-up time was 11 months. RESULTS: After re irradiation, 58% of patients had complete regression of primary tumor. One-year loco-regional progression-free, distant metastasis-free and overall survival rates were 56, 90, and 63%, respectively. Significantly better 1-year local progression-free rate was observed in rT1-3 than r T4 tumor (100 vs. 35%). Grade 3 late toxicities, mostly ototoxicity/cranial neuropathy, occurred in six patients (19%). One-year actuarial rates of late toxicities were 70% for all grades and 25% for Grade 3. CONCLUSION: Our preliminary results showed that good control of rT1-3 NPC can be achieved using IMRT with a dose between 50 and 60 Gy, whereas the outcome for r T4 tumor remained poor. Late toxicities were common but incidence of severe toxicities was relatively low.
BACKGROUND AND PURPOSE: To evaluate the treatment outcome in patients with locally recurrent nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiation therapy (IMRT). MATERIALS AND METHODS: Between October 2001 and May 2004, 31 patients with locally recurrent NPC received re-irradiation using IMRT. The rT classification distribution was 3 for rT1, 5 for rT2, 9 for rT3, and 14 for r T4. Median time from first course of radiotherapy to re-irradiation was 51 months. IMRT was performed using step-and-shoot method with nine 4-6 MV photon fields and median prescribed dose was 54 Gy (range: 50-60 Gy). Additional treatments included cisplatin-based induction chemotherapy in 68% and radiosurgery boost with a single dose which ranged from 8.5 to 12.5 Gy in 32%. Median follow-up time was 11 months. RESULTS: After re irradiation, 58% of patients had complete regression of primary tumor. One-year loco-regional progression-free, distant metastasis-free and overall survival rates were 56, 90, and 63%, respectively. Significantly better 1-year local progression-free rate was observed in rT1-3 than r T4 tumor (100 vs. 35%). Grade 3 late toxicities, mostly ototoxicity/cranial neuropathy, occurred in six patients (19%). One-year actuarial rates of late toxicities were 70% for all grades and 25% for Grade 3. CONCLUSION: Our preliminary results showed that good control of rT1-3 NPC can be achieved using IMRT with a dose between 50 and 60 Gy, whereas the outcome for r T4 tumor remained poor. Late toxicities were common but incidence of severe toxicities was relatively low.
Authors: Victor H F Lee; Dora L W Kwong; To-Wai Leung; Sherry C Y Ng; Ka-On Lam; Chi-Chung Tong; Chun-Kin Sze Journal: Eur Arch Otorhinolaryngol Date: 2016-10-13 Impact factor: 2.503
Authors: Felix Zwicker; Falk Roeder; Christian Thieke; Carmen Timke; Marc W Münter; Peter E Huber; Jürgen Debus Journal: Strahlenther Onkol Date: 2010-12-23 Impact factor: 3.621
Authors: Chrystal U Louis; Karin Straathof; Catherine M Bollard; Sravya Ennamuri; Claudia Gerken; Teresita T Lopez; M Helen Huls; Andrea Sheehan; Meng-Fen Wu; Hao Liu; Adrian Gee; Malcolm K Brenner; Cliona M Rooney; Helen E Heslop; Stephen Gottschalk Journal: J Immunother Date: 2010 Nov-Dec Impact factor: 4.456
Authors: S J Treece; M Mukesh; Y L Rimmer; S J Tudor; J C Dean; R J Benson; D L Gregory; G Horan; S J Jefferies; S G Russell; M V Williams; C B Wilson; N G Burnet Journal: Br J Radiol Date: 2013-01 Impact factor: 3.039
Authors: Carlos Suárez; Juan P Rodrigo; Alessandra Rinaldo; Johannes A Langendijk; Ashok R Shaha; Alfio Ferlito Journal: Eur Arch Otorhinolaryngol Date: 2010-09-24 Impact factor: 2.503