eISSN: 2081-2841
ISSN: 1689-832X
Journal of Contemporary Brachytherapy
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2/2023
vol. 15
 
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abstract:
Original paper

Intra-operative interstitial brachytherapy in a novel infra-zygomatic approach for partially resectable head and neck cancers around the base of skull: A technical note

Siddanna R Palled
1
,
Jaswanthi Akkpatti Ramachandra Reddy
1
,
Purushottam Chavan
1
,
Siddappa K
,
Sunil RA
1
,
Sanjeet Kumar Mondal
1
,
Bindu Krishnappa Venugopal
1
,
V Lokesh
1

1.
Department of Radiation Oncology, Kidwai Memorial Institute of Oncology, India
J Contemp Brachytherapy 2023; 15, 2: 148–153
Online publish date: 2023/04/21
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Purpose:
To report an intra-operative catheter insertion technique into the base of skull tumor bed following surgical resection for maxillary tumors.

Material and methods:
A 42-year-old male patient diagnosed with carcinoma of the maxilla was treated with neoadjuvant chemotherapy followed by chemo-radiation using external beam technique combined with brachytherapy boost to post-operative bed. Brachytherapy was delivered via intra-operative catheter placement at the base of skull to residual disease, which was surgically unresectable. Initially, catheters were placed cranio-caudally. This was later changed into an infra-zygomatic approach to improve planning and dose coverage. High-risk clinical tumor volume (CTV) was generated with a 3 mm margin to residual gross tumor. Planning was done using Varian Eclipse brachytherapy planning system, and an optimal plan was generated.

Conclusions:
An innovative, beneficial, and safe brachytherapy approach is necessary in a difficult and critical area, such as the base of skull. Our novel method of implant insertion through infra-zygomatic approach resulted in a safe and successful procedure.

keywords:

brachytherapy, base of skull, zygomatic process

 
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