metastatic lesion
Medical term for a secondary tumor formed by metastasis. Often contrasted with 原発巣 (primary lesion).
See also: 原発巣
A metastatic lesion was found in the liver on the CT scan.
Both the primary lesion and the metastatic lesions need to be treated.
Compound of 転移 (metastasis) and 巣 (nest, focus), literally 'metastasis nest'.