In what kind of metastasis are new tumors diagnosed after the primary tumor has been treated?

The correct answer is metachronous metastasis, which refers to new tumors that are identified after the primary tumor has been treated. This term is particularly relevant in oncology since it indicates that a period of time has passed between the treatment of the initial tumor and the diagnosis of the secondary tumors. This distinction is important because it helps clinicians understand the progression of cancer and the potential for new malignancies to develop after treatment, which can influence follow-up care and monitoring strategies.

Synchronous metastasis, in contrast, involves multiple tumors being diagnosed at the same time as the primary tumor, highlighting that both are present simultaneously. Precocious and oncological are not standard terms used to describe the timing of metastasis and therefore do not apply in this context. Metachronous metastasis emphasizes the sequential nature of tumor development and is critical for assessing long-term outcomes in cancer survivorship.