The term hyaline denotes a substance with a glass-like appearance.


In histopathological
Histopathology refers to the microscopic examination of tissue in order to study the manifestations of disease...

 medical usage, a hyaline substance appears glassy and pink after being stained with haematoxylin
Haematoxylin, hematoxylin, Natural Black 1, or C.I. 75290 is extracted from the heartwood of the logwood tree. When oxidized it forms haematein, a compound that forms strongly coloured complexes with certain metal ions, the most notable ones being Fe and Al salts. Metal-haematein complexes are used...

 and eosin
Eosin is a fluorescent red dye resulting from the action of bromine on fluorescein. It can be used to stain cytoplasm, collagen and muscle fibers for examination under the microscope. Structures that stain readily with eosin are termed eosinophilic....

 — usually it is an acellular, proteinaceous
Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of...

 material. An example is hyaline cartilage
Hyaline cartilage
Hyaline cartilage consists of a slimy mass, pearly bluish in colour with firm consistency and considerable collagen. It contains no nerves or blood vessels, and its structure is relatively simple....

, a transparent, glossy articular joint cartilage.

Some mistakenly refer to all hyaline as hyaline cartilage, however hyaline is a descriptive term that applies to other material besides the cartilage itself.

Arterial hyaline is seen in aging, high blood pressure, diabetes mellitus
Diabetes mellitus
Diabetes mellitus, often simply referred to as diabetes, is a group of metabolic diseases in which a person has high blood sugar, either because the body does not produce enough insulin, or because cells do not respond to the insulin that is produced...

 and in association with some drugs (e.g. calcineurin inhibitors). It is bright pink with PAS
-Automotive:* Power-assisted steering, or power steering, in automobiles* Progressive Activity Sedan, a vehicle category/development idea by BMW-Companies:* PanAmSat, a defunct satellite service provider...


Ichthyology and entomology

In ichthyology
Ichthyology is the branch of zoology devoted to the study of fish. This includes skeletal fish , cartilaginous fish , and jawless fish...

 and entomology
Entomology is the scientific study of insects, a branch of arthropodology...

, the hyaline term usage denotes a type of colorless, transparent substance.

See also

  • Infant respiratory distress syndrome
    Infant respiratory distress syndrome
    Infant respiratory distress syndrome , also called neonatal respiratory distress syndrome or respiratory distress syndrome of newborn, previously called hyaline membrane disease, is a syndrome in premature infants caused by developmental insufficiency of surfactant production and structural...

    , previously known as hyaline membrane disease.
  • Hyaloserositis
    In pathology, hyaloserositis is the coating of an organ with a fibrous hyaline, resulting from inflammation of the serous membrane covering the organ.The spleen is commonly affected and often referred to as sugar-coated spleen...

  • Hyaline arteriolosclerosis
    Hyaline arteriolosclerosis
    Hyaline arteriolosclerosis, also arterial hyalinosis and arteriolar hyalinosis, refers to thickening of the walls of arterioles by the deposition of homogeneous pink hyaline material...

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