English to Russian Medical Medical (general)

If lack of tumor invasion into blood vessels cannot be confirmed, we recommend excluding such subjects.
Lack of such information in radiology reports does not necessarily mean that there is definitely no evidence of tumor invasion into blood vessels.
It is important to verify with qualified staff (e.g., radiologist) that blood vessels in association with tumor were actually reviewed. We recommend documentation in source data confirming that evaluation of blood vessels in association with tumor has been actually performed for all future subjects.