Cyber knife as a treatment for malignant tumors: prospective observational study

Cyber knife as a treatment for malignant tumors: prospective observational study - CK study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000047367

Enrollment

500

Registered

2022-05-01

Start date

2022-05-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

lung cancer, hepatoma, renal cancer, spinal cord tumor, and metastasis

Interventions

5 fraction 35 to 45 Gy.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Diameter equal to 5 cm or less than 5cm, primary lung cancer, renal cancer or hepatoma, tumor numbers equal to 3 or less than 3 metastatic lung tumor or liver tumor. Local prostate cancer or pancreas cancer. Metastasis equal to 5 or less than 5. No organs failure. Informed consent.

Exclusion criteria

Exclusion criteria: Sever organs failure. Presence of dementia.

Design outcomes

Primary

Measure	Time frame
Over all survival	—

Countries

Japan

Contacts

Public ContactTakamasa Ohki

Shioda Memorial Hospital Cyber knife center

anb72547@nifty.com0475-35-0099

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026