| Popis: |
All cerebral tumors can arise anywhere in the brain, but some tumors typically develop from deep brain structures, while others rarely grow there. Tumors that affect the thalamus and the basal ganglia can develop as primary tumors or secondarily from neighboring tumors, which invade the deep portions of the cerebrum. Primary neoplasms are predominantly low-grade astrocytomas; but oligodendrogliomas, ganglion cell tumors, germ-cell tumors, primitive neuroectodermal tumors, atypical rhabdoid–teratoid tumors, lymphomas, and metastases can also grow up from the basal ganglia and thalamic region. Hamartomas and chordoid gliomas are rare tumors that are typically encountered in the hypothalamic region. This chapter illustrates the computed tomographic and magnetic resonance imaging (MRI) features of the primary thalamic, basal ganglionic, and hypothalamic tumors, with special focus on new MRI-related techniques. |
