Patterns of loco-regional recurrence after conformal and intensity-modulated radiotherapy for head and neck cancer

Patterns of loco-regional recurrence after conformal and intensity-modulated radiotherapy for head and neck cancer: an observational retrospective study

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN17397551

Enrollment

Registered

2017-03-06

Start date

2015-01-01

Completion date

Unknown

Last updated

2017-04-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Head and neck cancer Cancer

Interventions

Patient data is retrospectively and anonymously analysed 4-5 years after completing treatment to find out whether the relapse is related to the treatment they received. The existing radiation data is

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Re-irradiation for first relapse in the head and neck region 2. Radiotherapy for both primary and recurrent disease at Oslo University Hospital 3. Computed tomography (CT), and/or positron emission tomography (PET)/magnetic resonance images (MRI) taken prior to radiotherapy 4. Available radiotherapy dose plans for the primary and recurrent disease which were technically possible to co-register 5. Completed their planned curative primary radiation treatment 6. Aged 18 or over

Exclusion criteria

Exclusion criteria: Does not meet the inclusion criteria

Design outcomes

Primary

Measure	Time frame
The site of tumor recurrence in comparison to primary tumor site, taken from existing patient data at 4-5 years after completing treatment	—

Secondary

Measure	Time frame
Radiation dose in the primary tumour and relapse area, taken from existing patient data at 4-5 years after completing treatment	—

Countries

Norway

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026