### medical science | pathology:

Lesion
* Some lesions cause tumorous growths by direct irritation of the tissues
  - have a more pyogenic granuloma-like appearance because of capillary proliferation
* appear on the skin which are due to small clots in the blood vessels under the surface.
* are another term to describe the fatty deposits that block blood vessels
  - most common in the spleen, liver, lymph nodes, and bone marrow
  - organoid, or hamartomatous, adnexal tumors of hair follicle origin
* can also affect the mouth, ear flaps, elbows, and genitalia
  - be difficult to differentiate from blood vessels on a x-ray
* can occur in various parts of the body such as the skin and other organs
  - on the sternum of the birds due to necrosis of the skin
* causing global aphasia affects almost all language areas in the left hemisphere.
* contain balloon cells, with small pyknotic nuclei and granular or vacuolated cytoplasm.
* develop in the organs of the body
  - on the skin, bone, and vital organs
* is composed of numerous oval and polygonal nests molded into a jigsawlike pattern
* nematodes cause reddish brown lesions on the roots that turn black later
  - penetrate roots and cause damage by feeding and migrating through the root tissues
  - primarily feed within newly formed feeder roots of fruit trees
* occur in areas of trauma such as bites, scratches and venipuncture.
* occur in the cerebral hemispheres, the basal ganglia, the brainstem and the cerebellum
  - connective tissues of the gills, mantle, and digestive gland
* result in loss of pain sensation in the ipsilateral face.
* show where the skin has been in contact with the bacteria.
* showing similar signal intensity to the brain include meningeomas, and metastases.
* shows thin capillaries or veins connecting directly to the arteries.
* very nonspecific word meaning any abnormality of structure.

### medical science | pathology | lesion:

Alternaria lesion
* can be irregular in shape and have a distinct greenish tinge.
* cause collapse of the stem.

Cavitary lesion
* are very rare, but children have a greater propensity for extrapulmonary disease.
* can be due to infection, tumor, infarction, trauma, and other entities.

Chronic lesion
* exhibit various degrees of peripheral fibrosis.
* have dermal fibrosis and a predominantly mononuclear inflammatory response.
* show an organizing membrane arising from the dural surface.

Cutaneous lesion
* appear in childhood, often in the first year of life.
* are distinctive and herald a moderately advanced stage of disease
  - important in transmission
* can occur in the setting of disseminated infection.
* develop three days after the onset of the attack.

Depressed lesion
* Some depressed lesions are the result of atrophy or scarring and have an intact epithelial surface.
* can also mean the presence of scar tissue.

Endometriotic lesion
* depend upon stimulation by estrogens.
* synthesize and secrete a haptoglobin-like protein.

Granulomatous lesion
* are often difficult to distinguish from neoplasms in some tissues.
* develop along the lymph channel, ulcerate, and drain.

Hippocampal lesion
* do the following in animals A. disrupt radial arm maze performance.
* interfere with Pavlovian negative occasion setting.

Metastatic lesion
* are less frequently calcified and often enhance.
* can erode the nasal septum or the hard palate or soft palate.
* represent the most common cause of pathology fractures due to a neoplasm.
* respond to chemotherapy or localized radiation therapy.

Ocular lesion
* are common, including mild conjunctivitis, burning and grittiness.
* occur in many inbred strains of laboratory mice.

Oral lesion
* arise over time where the tobacco is held between the cheek and gum.
* develop in almost all patients and can occur on any of the oral mucous membranes.
* occur due to falls, injury with forks, or due to mastication.