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CTRI Number  CTRI/2025/10/096230 [Registered on: 21/10/2025] Trial Registered Prospectively
Last Modified On: 16/10/2025
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Cohort Study 
Study Design  Single Arm Study 
Public Title of Study   Treatment Outcome of Head and Neck Cancer Patients with Extranodal Extension treated with Advanced Radiotherapy and Chemotherapy 
Scientific Title of Study   Treatment Outcome of Patients with Regionally Advanced Head and Neck Squamous Cell Carcinoma with Clinical Extranodal Extension Treated with Definitive Chemoradiation: A Prospective Single-Arm Study 
Trial Acronym  N3B 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr Jyotiman Nath 
Designation  Associate Professor 
Affiliation  Dr. B. Borooah Cancer Institute, Guwahati, Assam 
Address  Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, A. K. Azad Road, Gopinath Nagar, Guwahati, Assam

Kamrup
ASSAM
781016
India 
Phone  9401512763  
Fax    
Email  jyotimannath@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Jyotiman Nath 
Designation  Associate Professor 
Affiliation  Dr. B. Borooah Cancer Institute, Guwahati, Assam 
Address  Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, A. K. Azad Road, Gopinath Nagar, Guwahati, Assam

Kamrup
ASSAM
781016
India 
Phone  9401512763  
Fax    
Email  jyotimannath@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Jyotiman Nath 
Designation  Associate Professor 
Affiliation  Dr. B. Borooah Cancer Institute, Guwahati, Assam 
Address  Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, A. K. Azad Road, Gopinath Nagar, Guwahati, Assam

Kamrup
ASSAM
781016
India 
Phone  9401512763  
Fax    
Email  jyotimannath@gmail.com  
 
Source of Monetary or Material Support  
NIL 
 
Primary Sponsor  
Name  Department of Radiation Oncology BBCI 
Address  Dr. B. Borooah Cancer Institute, A. K. Azad Road, Gopinath Nagar, Guwahati, Assam, India- 781016 
Type of Sponsor  Research institution and hospital 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Jyotiman Nath  Dr. B. Borooah Cancer Institute, Guwahati, Assam  Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, A. K. Azad Road, Gopinath Nagar, Guwahati, Assam, India- 781016
Kamrup
ASSAM 
09401512763

jyotimannath@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Medical Ethics Committee, BBCI  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: C139||Malignant neoplasm of hypopharynx,unspecified, (2) ICD-10 Condition: C329||Malignant neoplasm of larynx, unspecified, (3) ICD-10 Condition: C109||Malignant neoplasm of oropharynx,unspecified,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Nil  Nil 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  70.00 Year(s)
Gender  Both 
Details  1. Histologically confirmed inoperable SCC of oropharynx, hypopharynx, or larynx with cN3b nodal status.
2. ECOG performance 0–1
3. Age 18–70 years
4. Written Informed Consent Obtained
 
 
ExclusionCriteria 
Details  1. Nodal disease with skin ulceration/fungation/bleeding
2. Prior Radiotherapy for head and neck area
3. Deranged renal function at baseline (Creatinine Clearance less than 50 ml/min)
4. Cases with radiological evidence of Cartilage or Bony Erosion
5. Baseline Non-Functional Larynx based on FEES Test
6. Unable to come for follow-up as per study protocol
 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
To assess the progression-free survival (PFS) at 2 year
 
To assess the progression-free survival (PFS) at 2 year
 
 
Secondary Outcome  
Outcome  TimePoints 
To estimate treatment related toxicities during radiotherapy, at completion and at every follow up using CTCAE 5.0 scale
During and at the end of Radiotherapy- Oral mucositis, Dermatitis, Dysphagia, Acute Xerostomia, Neutropenia, Thrombocytopenia, Anaemia, Electrolyte imbalance
At follow ups- Xerostomia, Subcutaneous Fibrosis, Dysphagia
 
 
To measure the QOL using instruments (Validated QOL Instruments)
EORTC QOL tool QLQ-C30 Quality of Life of Cancer Patients (in English and Assamese)
QLQ-H&N35 specific for Head and neck cancer (In English and Assamese)
Patient reported HRQOL will be recorded at baseline and at 3 months,6 months and 1 year after completion of Radiotherapy.
 
at baseline, 3 months, 6 months, and 1 year post RT completion 
To estimate various prognostic factors associated with treatment response eg. Age, Gender, Size of the Node, T-stage, HPV status for oropharyngeal primary, history of smoking, alcohol consumption etc.   
to estimate the Patterns of Failure:-
1. Locoregional Failure
2. Distant Metastases
 
 
 
Target Sample Size   Total Sample Size="45"
Sample Size from India="45" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   N/A 
Date of First Enrollment (India)   03/11/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="2"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary  

Head and Neck Squamous Cell Carcinoma (HNSCC) is among the most common cancers in India, with a high burden in the North Eastern region. A large proportion of patients present with locally advanced disease involving lymph nodes with extranodal extension, which is classified as clinical N3b according to AJCC 8th edition. This subset carries a poor prognosis, and there is no established standard of care for patients with clinical N3b disease.

This prospective single arm study aims to evaluate treatment outcomes in patients with locally advanced inoperable head and neck squamous cell carcinoma with clinical extranodal extension treated with definitive concurrent chemoradiation using modern conformal radiotherapy techniques.

Eligible patients aged 18 to 70 years with ECOG performance status 0 or 1 and histologically confirmed squamous cell carcinoma of oropharynx, hypopharynx or larynx with clinical N3b status will be included. Patients with prior head and neck radiotherapy, renal dysfunction or ulcerated nodes will be excluded.

All patients will receive Volumetric Modulated Arc Therapy (VMAT) based radiotherapy to a total dose of 66 Gray to the high risk volume, 60 Gray to intermediate risk and 54 Gray to low risk volumes in 30 fractions over six and a half weeks. Concurrent weekly cisplatin at 40 milligrams per square meter will be administered to achieve a cumulative dose of at least 200 milligrams per square meter.

The primary endpoint is two year progression free survival. Secondary endpoints include treatment related toxicity assessed by CTCAE version 5.0, quality of life assessment using EORTC QLQ C30 and HN35 questionnaires, and analysis of prognostic factors such as age, sex, nodal size and HPV status.

Sample size is 45 patients, based on an expected improvement in two year progression free survival from 7.5 percent in historical data to 25 percent with modern radiotherapy. Statistical analysis will use Kaplan Meier method and log rank test.

The study will be conducted in the Department of Radiation Oncology, Dr B Borooah Cancer Institute, Guwahati. Data will be monitored by the institutional Data Monitoring and Safety Unit. The study is expected to generate evidence on the role of advanced radiotherapy in improving outcomes for patients with regionally advanced head and neck cancer with extranodal extension.

 
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