ABSTRACT
PURPOSE
: To analyze the long-term local control, overall survival and toxicity in Carcinoma
Buccal Mucosa patients treated with interstitial brachytherapy.
METHODS AND MATERIALS
: This analysis included patients diagnosed as Carcinoma Buccal Mucosa on biopsy and
treated with radical brachytherapy or External Beam Radiotherapy (EBRT) followed by
brachytherapy boost. All patients received High dose rate (HDR) interstitial brachytherapy.
The total dose was 35 Gy in ten fractions for brachytherapy alone. Patients who received
EBRT (50–54 Gy) were boosted by brachytherapy to a dose of 18–24 Gy in 6–8 fractions.
All patients were treated using CT based planning.
RESULTS
: Between 2007 to 2017, a total of 24 patients of Carcinoma Buccal Mucosa received
HDR interstitial brachytherapy either alone or as a boost. Majority of the patients
were tobacco chewers (80%). 17(71%) patients were clinical stage T2N0M0 and 7(29%)
were clinically T1N0M0. At a median follow up of 7 years (3–12 years), the local control
rate was 100% in stage I and 88% in stage II. The 5 year overall survival rate was
80%. Two patients developed nodal recurrence and one patient developed distant metastasis
within two years of treatment. Tumor size and brachytherapy technique (radical vs.
boost) did not impact local control or overall survival (p > 0.05). Majority of the acute toxicities were Grade 1 and 2. One patient developed
osteoradionecrosis of the mandible.
CONCLUSIONS
: Interstitial brachytherapy in early-stage Buccal Mucosa cancer either alone or as
a boost provides excellent long term local control and overall survival. The acute
and late toxicities are acceptable with majority of the patients presenting with Grade
1 or 2 toxicity.
Keywords
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Article info
Publication history
Published online: December 04, 2021
Accepted:
October 14,
2021
Received in revised form:
September 26,
2021
Received:
April 24,
2021
Identification
Copyright
© 2021 American Brachytherapy Society. Published by Elsevier Inc. All rights reserved.