It is impossible to say right now, as this nodule would be considered "indeterminate" if seen on only a single CT scan. On the other hand, if it significantly enlarges (or/and if new lung nodules should subsequently appear) on subsequent scans, then this finding would be concerning for possible metastatic cancer.
Sincerely,
Robert A. Wascher, MD, FACS
www.doctorwascher.com
Author, "A Cancer Prevention Guide for the Human Race"