noun
metastatic lesion
Medical term for a secondary tumor formed by metastasis. Often contrasted with 原発巣 (primary lesion).
See also: 原発巣
CT検査で肝臓に転移巣が見つかった。
A metastatic lesion was found in the liver on the CT scan.
原発巣と転移巣の両方を治療する必要がある。
Both the primary lesion and the metastatic lesions need to be treated.