Head and neck cancer of unknown primary: A multi-institutional retrospective study in Northern Thailand

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20220826001

Enrollment

200

Registered

2022-08-26

Start date

2021-09-07

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Patients with metastatic carcinoma to cervical lymph node without known primary tumor who were treated between 1990 and 2020. Head and neck cancer Neoplasm metastasis Unknown primary

Interventions

Patients with metastatic cervical lymph node with unknown primary cancer

Treatment

Head and neck carcinoma unknown primary

Eligibility

Sex/Gender

All

Age

18 Years to 80 Years

Inclusion criteria

Inclusion criteria: Patients who were treated at the Departments of Otolaryngology as well as Radiotherapy and Radiation Oncology of 5 institutions, including Maharaj Nakorn Chiang Mai hospital, Buddhachinaraj hospital, Lampang hospital, Lampang cancer hospital, and Phayao hospital between 1990 and 2020 with metastatic carcinoma to cervical lymph node without known primary tumor.

Exclusion criteria

Exclusion criteria: No clinical characteristics or treatment data is available.

Design outcomes

Primary

Measure	Time frame
Survival rate 3 years after treatment Overall survival rate,Disease free survival 3 years disease free survival rate	—

Secondary

Measure	Time frame
Clinical presentation At presentation Number and percentage	—

Countries

Thailand

Contacts

Public ContactPichit Sittitrai

Department of Otolaryngology, Faculty of Medicine, Chiang Mai University

psittitrai@yahoo.com9953935562

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026