Neuropathologie

Neuropathology is a medical specialty within pathology that studies diseases of the nervous system by examining tissue from the brain, spinal cord, nerves, and muscle. It integrates clinical information from neurology and radiology with morphological and molecular analyses to establish diagnoses and understand disease mechanisms. Specimens arise from autopsies, brain or nerve biopsies, surgical resections, and postmortem studies; neuropathologists may also work with brain banks for research.

The field developed in the 19th and early 20th centuries through systematic postmortem examinations of the brain, helping to link clinical symptoms with specific tissue changes. Today, neuropathology covers a wide range of conditions affecting the central and peripheral nervous systems, including neurodegenerative, vascular, inflammatory, infectious, demyelinating, neoplastic, and metabolic disorders. In autopsy work, the pathologist determines cause of death and characterizes disease processes; in living patients, biopsy and intraoperative samples aid diagnosis and treatment decisions, such as for tumors or inflammatory neuropathies.

Techniques used in neuropathology include histology with special stains, immunohistochemistry for markers such as tau, beta-amyloid, alpha-synuclein, and GFAP, as well as molecular genetic analyses, in situ hybridization, and increasingly digital pathology and sequencing. Electron microscopy can provide ultrastructural detail for select questions. Classification and interpretation are informed by evolving criteria and biomarkers, such as those used in neurodegenerative disease research and diagnosis.

Education and practice: Neuropathologists generally complete medical training in pathology followed by a subspecialty fellowship in neuropathology. They work in academic centers, hospitals, and brain banks, collaborating with neurologists, neurosurgeons, radiologists, and researchers. Ethical considerations include autopsy consent and appropriate handling of tissue samples.