Is there a change of differentiation in recurrences of oral squamous cell carcinoma (OSCC)? Recurrence rate and grading-shift.

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00006868

Enrollment

429

Registered

2014-11-27

Start date

2013-10-15

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

C06.9

Interventions

Group 1: Retrospektive analysis of recurrences and change of tumor differentiation in surgically treated OSCC cases.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. surgical treatment from January 1st 2000 to June 30th 2013 2. patients with primary OSCC 3. initial surgical therapy 4. adjuvant radiotherapy

Exclusion criteria

Exclusion criteria: Patients were excluded in case of 1. malignancies other than OSCC, 2. extraoral location of tumor 3. primary non-surgical therapy (radio-chemotherapy), 4. secondary OSCC or CUP syndrome

Design outcomes

Primary

Measure	Time frame
Time to Recurrence	—

Secondary

Measure	Time frame
therapy of the primary tumour and differetiation of the recurrence	—

Countries

Germany

Contacts

Public ContactMichael Ermer

Uniklinik FreiburgKlinik für MKG Chirurgie

michael.ermer@uniklinik-freiburg.de076127047010

Outcome results

None listed

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