====== Tumor-to-tumor metastases ======


[[Tumor]]-to-tumor [[metastases]] (TTM) is defined as the [[hematogenous]] metastasis within a primary host tumor from a donor neoplasm. Since there is insufficient evidence regarding the pathophysiology, clinical course, and management of TTM, there are no precise guidelines for its management. 

[[Tumor-to-meningioma metastases]]