<unk>  carcinomatosis occurs when the<unk>  cells invade the cerebrospinal fluid and spread throughout the central nervous system. The metastatic tumor cells grow either attached to the pia mater covering the brain and spinal cord or floating unattached to the subarachnoid space. Tumors of diverse origins and hematologic<unk> s may spread to this space. Some patients can develop a<unk>  tumor while receiving chemotherapy for their primary tumor.
Leptomeningeal cancer
Brain metastasis
Brain abscess
Amoebic brain abscess
Lymphocytic meningoradiculitis
Primary central nervous system lymphoma
Malignant multiple sclerosis
Central nervous system cavernous hemangioma