Please assess the completion status of the following clinical trial:

Trial Title: Prognostic Value of CTC in HNSCC Patients

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* histologically or cytopathologically proven head and neck squamous cell carcinoma Age ≥ 20 years. Measurable or evaluable disease according to Response Evaluation Criteria In Solid Tumors(RECIST) criteria.~Ability to sign informed consent.~Exclusion Criteria:~* Prior cancers within 5 years, except for non-melanoma skin cancers, and in situ cervical cancers.~Inability to comply with study and/or follow-up procedures.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: None
- Healthy Volunteers: t

Based on this trial design, predict the completion outcome and termination type (if applicable).