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Items: 4

1.

Anaphylactic shock

An acute hypersensitivity reaction due to exposure to a previously encountered ANTIGEN. The reaction may include rapidly progressing URTICARIA, respiratory distress, vascular collapse, systemic SHOCK, and death. [from MeSH]

MedGen UID:
1902
Concept ID:
C0002792
Pathologic Function
2.

Anaphylaxis

An acute hypersensitive immune response that occurs from exposure to an allergen. It results from the release of histamine and histamine-like substances from mast cells, and can present with breathing difficulty due to narrowed airways, dizziness and hypotension, skin rash, weak pulse, nausea and vomiting. [from NCI]

MedGen UID:
810685
Concept ID:
C0850803
Disease or Syndrome
3.

Allergy

A pathological immune process generally directed towards a foreign antigen, which results in tissue injury, which is usually transient. It is the realization of the allergic disposition. It is most often applied to type I hypersensitivity but other hypersensitivity types especially type IV (e.g. allergic contact dermatitis) may be involved. [from SNOMEDCT_US]

MedGen UID:
287129
Concept ID:
C1527304
Pathologic Function
4.

Allergy

A pathological process initiated by exposure to a defined stimulus at a dose tolerated by normal persons. It may be the manifestation of a disposition to hypersensitivity. [from SNOMEDCT_US]

MedGen UID:
9370
Concept ID:
C0020517
Pathologic Function
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