Most common cause of leptomeningeal spread is from which of the following

Leptomeningeal metastases, also know as carcinomatous meningitis, refers to the spread of malignant cells through the CSF space. These cells can originate from primary CNS tumors (e.g. This aicle has a focus on subarachnoid space involvement. Refer to <a class="internal" style="box-sizing: border-box; background: transparent; color: ; text-decoration-line: none;" href=" extramedullary metastases</a> for a discussion of leptomeningeal metastases in the spine. For other intracranial metastatic locations, please refer to the main aicle on <a class="internal" style="box-sizing: border-box; background: transparent; color: ; text-decoration-line: none;" href=" metastases</a>.