Pre-clinical medicine
Pathology
Pathology is the study of disease: what goes wrong in cells and tissues, and how it shows up in tests. It teaches doctors the mechanisms of illness, from inflammation to cancer to brain degeneration.
Depth by stage, Pre-U → Consultant (details)
What is it?
General pathology covers the basic processes of disease: cell injury and death, inflammation and healing, abnormal growth and cancer, blood clotting and circulation problems, and genetic disease.
Systemic pathology then applies these to each organ system: heart disease, lung disease, liver disease, brain disease and so on. Laboratory branches include histopathology, chemical pathology, haematology and microbiology.
Medical students study tissue specimens, laboratory results and post-mortem findings to link what is seen at the bedside with what is happening in the body.
Why does a psychiatrist need it?
Some psychiatric presentations are caused by physical disease: brain tumours, strokes, infections, autoimmune conditions and dementia. Pathology explains the brain changes in Alzheimer's disease, vascular dementia and Lewy body dementia, the liver damage of chronic alcohol use, and the blood disorders that some psychiatric drugs (such as clozapine) can cause.
What level is expected at each stage?
Scale: 1. Aware → 2. Understands → 3. Applies → 4. Masters / Teaches. What the levels mean.
- Pre-UNot expected
- Pre-clinicalAppliesApplies general and systemic pathology principles in exams and case analyses.
- ClinicalUnderstandsUnderstands the pathology behind common clinical conditions.
- HousemanshipUnderstandsUnderstands and acts on laboratory results such as blood counts and liver tests.
- Medical officerUnderstandsUnderstands pathology relevant to the posting.
- Psych traineeUnderstandsUnderstands neuropathology of dementia, brain injury and other organic conditions for exams and practice.
- Specialist / consultantUnderstandsUnderstands enough to work with neurologists and physicians on organic presentations.
What are the key topics?
General pathology
- Cell injury, adaptation and death
- Acute and chronic inflammation
- Healing and repair
- Thrombosis, embolism and infarction
- Neoplasia: benign versus malignant growth
Systemic pathology
- Cardiovascular disease and atherosclerosis
- Liver disease, including alcohol-related damage
- Endocrine disease (thyroid, adrenal)
- Infectious disease pathology
Neuropathology
- Stroke and vascular brain damage
- Neurodegeneration: Alzheimer's, Parkinson's, Lewy body, frontotemporal
- Brain tumours
- Infections of the nervous system
- Traumatic brain injury
Haematology and chemical pathology
- Anaemia and its causes
- White cell disorders, including drug-induced neutropenia
- Bleeding and clotting disorders
- Interpreting common blood tests
How is it learned and assessed?
- Lectures, PBL and laboratory sessions with specimens
- Clinicopathological case discussions
- MCQ, short-answer and practical examinations
- Neuropathology revisited in psychiatry basic sciences exams
Typical textbooks and resources
- Robbins and Cotran Pathologic Basis of Disease — Elsevier
- Robbins Basic Pathology — Elsevier
- Underwood's Pathology: A Clinical Approach — Elsevier
- Muir's Textbook of Pathology — CRC Press
Titles are widely used examples; editions change. Use university libraries or legitimate purchases.
Common questions
Why do psychiatrists study disease of the body?
Because physical illness can cause mental symptoms and mental illness can damage physical health. Recognising a physical cause, such as a brain tumour or thyroid disease, prevents misdiagnosis.
What is neuropathology?
It is the study of disease in the brain and nerves, such as the protein deposits seen in Alzheimer's disease. Psychiatrists learn it particularly for dementia and brain injury.