Clinical pathology (US, UK, Ireland, Commonwealth, Portugal, Brazil, Italy), Laboratory Medicine (Germany, Romania, Poland, Eastern Europe), Clinical analysis (Spain) or Clinical/Medical Biology (France, Belgium, Netherlands, Austria, North and West Africa...), is a medical specialty that is concerned with the diagnosis of disease based on the laboratory analysis of bodily fluids, such as blood, urine, and tissues using the tools of chemistry, microbiology, hematology and molecular pathology. This specialty requires a medical residency and should not be confused with Biomedical science, which is not necessarily related to medicine.
Licensing and subspecialties 
The American Board of Pathology certifies clinical pathologists, and recognizes the following secondary specialties of clinical pathology:
- Chemical pathology, also called clinical chemistry
- Blood banking - Transfusion medicine
- Clinical microbiology
- Molecular genetics pathology.
Clinical pathologists are often medical doctors. In some countries in South-America, Europe, Africa or Asia, this specialty can be practiced by non-physicians, such as Ph.D or Pharm.D after a variable number of years of residency.
In United States of America 
Clinical pathologists work in close collaboration with clinical scientists (clinical biochemists, clinical microbiologists, etc.), medical technologists, hospital administrators, and referring physicians to ensure the accuracy and optimal utilization of laboratory testing.
Clinical pathology is one of the two major divisions of pathology, the other being anatomical pathology. Often, pathologists practice both anatomical and clinical pathology, a combination sometimes known as general pathology. Similar specialties exist in veterinary pathology.
Clinical pathology is itself divided in to subspecialties, the main ones being clinical chemistry, clinical hematology/blood banking, hematopathology and clinical microbiology and emerging subspecialities such as molecular diagnostics and proteomics. Many areas of clinical pathology overlap with anatomic pathology. Both can serve as medical directors of CLIA certified laboratories. This overlap includes immunoassays, flow cytometry, microbiology and cytogenetics and any assay done on tissue. Overlap between anatomic and clinical pathology is expanding to molecular diagnostics and proteomics as we move towards making the best use of new technologies for personalized medicine.
In Europe 
In France, Clinical Pathology is called Medical Biology ("Biologie médicale") and is practiced by both M.D.s and Pharm.Ds. The residency lasts four years. Specialists in this discipline are called "Biologiste médical" which can be translate byClinical Biologist rather than "Clinical pathologist".
Place of work 
See Medical laboratory.
Tools of Clinical Pathology 
Microscopes, analysers, strips, centrifugal machines...
Macroscopic examination 
The visual examination of the taken liquid is a first main indication for the pathologist or the physician. The aspect of the liquid, in addition, conditions the analytical assumption of responsibility that follow and the validity of the end-results.
Microscopical examination 
Microscopic analysis is an important activity of the pathologist and the laboratory assistant. They have many different colourings at their disposal (GRAM, MGG, Grocott, Ziehl-Neelsen, …). Immunofluorescence, cytochemistry, the immunocytochemistry and FISH are also used in order make a correct diagnosis.
This stage allows the pathologist to determine the character of the liquid: “normal”, tumoral, inflammatory even infectious. Indeed, microscopic examination can often determine the causal infectious agent, in general a bacterium, a mould, a yeast, or a parasite, more rarely a virus.
See Automated analyser.
The analysers, by the association of robotics and spectrophotometry, allowed these last decades a better reproducibility of the results of proportionings, in particular in medical biochemistry and hematology.
The companies of in vitro diagnosis henceforth try to sell chains of automats, i.e. a system allowing the automatic transfer of the tubes towards the various types of automats of the same mark. These systems can include the computer-assisted management of a serum library.
These analysers must undergo daily controls to guarantee a result just possible, one speaks about quality control. These analysers must also undergo daily, weekly and monthly maintenances.
A big part of the examinations of clinical pathology, primarily in medical microbiology, use culture media. Those allow, for example, the description of one or several infectious agents responsible of the clinical signs.
Values known as “normal” or reference values 
Detailed article: Reference range.
See also 
- Medical laboratory
- Anatomic pathology
- Medical technologist
- Veterinary pathology
- Clinical Biologist
- Name of specialization in clinical pathology in different European countries
- Sub-specialties and Curriculum content of Clinical pathology specialization in France
- Description of Pathology in USA
- "Laboratory medicine specialist in EFCC newsletter may 2011 (page 5)
- Reglementation for French Residency in Clinical Pathology
- American Society for Clinical Pathology
- American Board of Pathology
- College of American Pathologists