Term
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Definition
- Physical changes in the skin considered to be caused directly by the disease process
- Types of primary lesions are rarely specific to a single disease entity |
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Term
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Definition
- May evolve from primary lesions or may be caused by external forces such as scratching, trauma, infection, or the healing process
- Distinction between a primary and secondary lesion is not always clear. |
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Term
- Solid raised lesion that has distinct borders and is less than 1 cm in diameter
- May have a variety of shapes in profile (domed, flat-topped, umbilicated) and may be associated with secondary features such as crusts or scales |
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Definition
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Term
| A raised solid lesion more than 1 cm. and may be in the epidermis, dermis, or subcutaneous tissue. |
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Definition
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Term
- A change in the color of the skin
- It is flat, if you were to close your eyes and run your fingers over the surface of a purely macular lesion, you could not detect it
- Greater than 1 cm
- May be referred to as a patch |
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Definition
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Term
| A solid mass of the skin or subcutaneous tissue; it is larger than a nodule. |
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Definition
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Term
- A solid, raised, flat-topped lesion greater than 1 cm. in diameter
- It is analogous to the geological formation, the plateau. |
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Definition
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Term
| - Raised lesions less than 1 cm. in diameter that are filled with clear fluid |
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Definition
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Term
| - Circumscribed fluid-filled lesions that are greater than 1 cm. in diamete |
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Definition
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Term
- Circumscribed elevated lesions that contain pus
- They are most commonly infected (as in folliculitis) but may be sterile (as in pustular psoriasis). |
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Definition
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Term
| - An area of edema in the upper epidermis |
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Definition
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Term
- Linear lesions produced by infestation of the skin and formation of tunnels |
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Definition
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Term
| - permanent dilatation of superficial blood vessels in the skin and may occur as isolated phenomena or as part of a generalized disorder |
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Definition
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Term
- Flakes or plates that represent compacted desquamated layers of stratum corneum
- Desquamation occurs when there are peeling sheets following acute injury to the skin |
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Definition
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Term
- Result of the drying of plasma or exudate on the skin
- Different than scaling (can be distinguished from the other by appearance alone) |
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Definition
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Term
| - Thinning or absence of the epidermis or subcutaneous fat. |
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Definition
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Term
- Thickening of the epidermis seen with exaggeration of normal skin lines
- It is usually due to chronic rubbing or scratching of an area |
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Definition
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Term
| - Slightly depressed areas of skin in which part or all of the epidermis has been lost |
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Definition
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Term
| - Traumatized or abraded skin caused by scratching or rubbing |
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Definition
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Term
| - Linear cleavage of skin which extends into the dermis |
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Definition
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Term
| - Necrosis of the epidermis and dermis and sometimes of the underlying subcutaneous tissue. |
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Definition
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Term
- Permanent fibrotic changes that occur on the skin following damage to the dermis
- May have secondary pigment characteristics |
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Definition
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Term
| - A hard plaque covering an ulcer implying extensive tissue necrosis, infarcts, deep burns, or gangrene |
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Definition
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Term
| - An exaggerated connective tissue response of injured skin that extend beyond the edges of the original wound |
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Definition
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Term
- Refer to bleeding that occurs in the skin
- Do not blanch when pressed
- If there is any quesiton, press on the lesions carefully with a glas slide |
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Definition
| Petechiae, Purpura, Ecchymoses |
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