Pathology

Pathology is the study of disease. The word pathology also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in the context of modern medical treatment, the term is often used in a narrower fashion to refer to processes and tests that fall within the contemporary medical field of "general pathology", an area that includes a number of distinct but inter-related medical specialties that diagnose disease, mostly through analysis of tissue and human cell samples. Pathology is a significant field in modern medi

a magnifying system capable of showing the interior or surface of a microscopic object by means of directed electron beams

right|thumb|250px|Adult black fly (Simulium yahense) with [[Onchocerca volvulus emerging from the insect's antenna. The parasite is responsible for the disease known as river blindness in Africa. Sample was chemically fixed and critical point dried, then observed using conventional scanning electron microscopy. Magnified 100×.]] Parasitology is the study of parasites, their hosts, and the relationship between them. As a biological discipline, the scope of parasitology is not determined by the organism or environment in question but by their way of life. This means it forms a synthesis of other

Psychopathology is the study of mental illness. It includes the signs and symptoms of all mental disorders. The field includes abnormal cognition, maladaptive behavior, and experiences which differ according to social norms. This discipline is an in-depth look into symptoms, behaviors, causes, course, development, categorization, treatments, strategies, and more.

Pathophysiology (or physiopathology) is a branch of study, at the intersection of pathology and physiology, concerning disordered physiological processes that cause, result from, or are otherwise associated with a disease or injury. Pathology is the medical discipline that describes conditions typically observed during a disease state, whereas physiology is the biological discipline that describes processes or mechanisms operating within an organism. Pathology describes the abnormal or undesired condition (symptoms of a disease), whereas pathophysiology seeks to explain the functional changes

In pathology, pathogenesis is the process by which a disease or disorder develops. It can include factors which contribute not only to the onset of the disease or disorder, but also to its progression and maintenance. The word comes .

medical procedure performed to detect, diagnose, or monitor diseases, disease processes, susceptibility, or to determine a course of treatment

resting or dormant stage of a microorganism

thumb|230px|Main staining patterns on chromogenic immunohistochemistry. thumb|right|Immunofluorescence of human skin using an anti-IgA antibody. The skin is from a patient with [[Henoch–Schönlein purpura: IgA deposits are found in the walls of small superficial capillaries (yellow arrows). The pale wavy green area on top is the epidermis, the bottom fibrous area is the dermis.]] thumb|"Block" staining: strong nuclear and cytoplasmic expression in a continuous segment of cells. Immunohistochemistry is a form of immunostaining. It involves the process of selectively identifying antigens in cells

thumb|right|350px|Micrograph|Microscope image showing [[contraction band necrosis, a histopathologic finding of myocardial infarction (heart attack).]] Histopathology (compound of three Greek words: 'tissue', 'suffering', and -logia 'study of') is the microscopic examination of tissue in order to study the manifestations of disease. Specifically, in clinical medicine, histopathology refers to the examination of a biopsy or surgical specimen by a pathologist, after the specimen has been processed and histological sections have been placed onto glass slides. In contrast, cytopathology examines f

genetic testing technique

thumb|278x278px|Vasculature of porcine skin under fluorescence ([[Smooth muscle actin with AlexaFluor 488). Green = smooth muscle actin (SMA) with Alexa 488 fluorophore. Blue = DAPI counterstain. Red = auto-fluorescence. ]]

area of clinical pathology that is generally concerned with analysis of bodily fluids

reason or origination of some disease

thumb|MRI of man with pituitary apoplexy Apoplexy () refers to the rupture of an internal organ and the associated symptoms. Informally or metaphorically, the term apoplexy is associated with being furious, especially as "apoplectic". Historically, it described what is now known as a hemorrhagic stroke, typically involving a ruptured blood vessel in the brain; modern medicine typically specifies the anatomical location of the bleeding, such as cerebral apoplexy, ovarian apoplexy, or pituitary apoplexy.

stained blood on microscope slide

medical specialty that is concerned with the diagnosis of disease based on the laboratory analysis of bodily fluids

preservation of biological tissue

person medically trained working with investigating deaths and injuries that occur under unusual or suspicious circumstances

type of necrosis which results in a transformation of the tissue into a liquid viscous mass

Enzootic describes the situation where a disease or pathogen is continuously present in at least one species of non-human animal in a particular region. It is the non-human equivalent of endemic.

Steatosis, also called fatty change, is abnormal retention of fat (lipids) within a cell or organ. Steatosis most often affects the liver – the primary organ of lipid metabolism – where the condition is commonly referred to as fatty liver disease. Steatosis can also occur in other organs, including the kidneys, heart, and muscle. When the term is not further specified (as, for example, in 'cardiac steatosis'), it is assumed to refer to the liver.

gastrointestinal system disease that is located in the mouth

laboratory method for measuring enzymatic activity

form of necrosis characterized by the action upon fat by digestive enzymes

In medicine, proteinopathy ([pref. protein]; -pathy [suff. disease]; proteinopathies pl.; proteinopathic adj), or proteopathy, protein conformational disorder, or protein misfolding disease, is a class of diseases in which certain proteins become structurally abnormal, and thereby disrupt the function of cells, tissues and organs of the body.

Polymelia is a birth defect in which an affected individual has more than the usual number of limbs. It is a type of dysmelia. In humans and most land-dwelling vertebrates, this means having five or more limbs. The extra limb is most commonly shrunken or deformed. The term is from Greek πολυ- "many", μέλεα "limbs".

Immunopathology is a branch of medicine that deals with immune responses associated with disease. It includes the study of the pathology of an organism, organ system, or disease with respect to the immune system, immunity, and immune responses. In biology, it refers to damage caused to an organism by its own immune response, as a result of an infection. It could be due to mismatch between pathogen and host species, and often occurs when an animal pathogen infects a human (e.g. avian flu leads to a cytokine storm which contributes to the increased mortality rate).

Genetic heart condition

genetic changes leading to uncontrolled cell growth and tumor formation

classification system for cervical neoplasia, named after the town in Maryland

Pannus is an abnormal layer of fibrovascular tissue or granulation tissue. Common sites for pannus formation include over the cornea, over a joint surface (as seen in rheumatoid arthritis), or on a prosthetic heart valve. Pannus may grow in a tumor-like fashion, as in joints where it may erode articular cartilage and bone.

thumb|right|Micrograph showing emperipolesis in a case of [[Rosai-Dorfman disease. H&E stain.]] Emperipolesis is the presence of an intact cell within the cytoplasm of another cell. It is derived from Greek (en is inside, peripoleomai is go round). Emperipolesis is an uncommon biological process, and can be physiological or pathological.

Aphasiology is the study of language impairment usually resulting from brain damage, due to neurovascular accident—hemorrhage, stroke—or associated with a variety of neurodegenerative diseases, including different types of dementia. These specific language deficits, termed aphasias, may be defined as impairments of language production or comprehension that cannot be attributed to trivial causes such as deafness or oral paralysis. A number of aphasias have been described, but two are best known: expressive aphasia (Broca's aphasia) and receptive aphasia (Wernicke's or sensory aphasia).

Variability in the size and shape of a cell or nucleus

Normopathy is the pathological pursuit of conformity and societal acceptance at the expense of individuality. In her book, Plea for a Measure of Abnormality, psychoanalyst Joyce McDougall coined the term normopathy to describe fear of individuality. Normopathy is difficult to diagnose because normopaths are integrated in society. Normopaths depend on social approval and validation.

thumb|Major topics of pathology Health informatics|informatics, including some that underlie telepathology: slide scanning, digital imaging and networks. Telepathology is the practice of pathology at a distance. It uses telecommunications technology to facilitate the transfer of image-rich pathology data between distant locations for the purposes of diagnosis, education, and research. Performance of telepathology requires that a pathologist selects the video images for analysis and the rendering of diagnoses. The use of "television microscopy", the forerunner of telepathology, did not require

aspect of history

sub-field of pathology

test to look for Tzanck cells

microscopic crystals composed of eosinophil protein galectin-10

chemical compound

Medical procedure

abnormal appearance of cell nuclei

immune system disease that is located in the lymphatic system

type of injury

discipline combining epidemiology and pathology

Medical condition

scientific study of disease

loss of genetic information due to mutation rates