What is a skin macule?
Macules are flat, nonpalpable lesions usually < 10 mm in diameter. Macules represent a change in color and are not raised or depressed compared to the skin surface. A patch is a large macule. Examples include freckles, flat moles, tattoos, and port-wine stains.
What is an example of macule?
Macules: Macules are flat skin lesions. They are small (less than one centimeter in diameter) and may be brownish or reddish. Freckles and flat moles are examples of macules. A macular rash is commonly seen in measles.
What is a papule vs macule?
Macule — a small patch of skin that is altered in colour, but is not elevated. Patch — a large area of colour change, with a smooth surface. Papule — elevated, solid, palpable lesion that is ≤ 1 cm in diameter. They may be solitary or multiple.
Are macules harmful?
Macules: Macules are smaller skin lesions, mostly in brown, white and red. Common examples of macules are moles and freckles. These skin lesions are not dangerous by themselves but can pose a threat when evolving over time.
What is Alesion?
A lesion is any damage or abnormal change in the tissue of an organism, usually caused by disease or trauma.
What is the difference between excoriation and erosion?
EROSION – A shallow, moist, or crusted lesion resulting from the loss of the superficial layers of the upper epidermis only, as from friction or pressure. EXCORIATION – A skin abrasion that is usually superficial and due to scratching of the skin.
What is a wheal skin eruption?
Wheal: A wheal is an evanescent rounded or flat-topped elevation in the skin that is edematous, and often erythematous. They may vary in size from a few mm. to many cm. The shape may change and these lesions are usually pruritic (itchy). These are really variations of papules, nodules or plaques that are evanescent.
Is a macule a mole?
A macule can be a variety of colors based on the cause. For example, macules can be moles (which are hyperpigmented, or darker, relative to the skin) or vitiligo lesions (which are hypopigmented or depigmented, or lighter, relative to the skin).
How are macules caused?
Macules can be caused by various conditions that affect the appearance of your skin, resulting in areas of discoloration. Conditions that are likely to cause macules are: vitiligo. moles.
Where do macules occur?
Macules can be seen on any part of the body, but are most frequently found on the chest, back, face, and arms. They may be hypopigmented (lighter than the surrounding skin), hyperpigmented (darker than the surrounding skins), or appear pink or red.
What is the difference between a compound and a molecule?
Compositions. The composition of a molecule takes place by a combination of one or more atoms and molecules can exist in a solid,liquid or gaseous state while compounds are
What are two examples of molecules?
Examples of Molecules. Molecules may be simple or complex. Here are examples of common molecules: H 2O (water) N 2 (nitrogen) O 3 (ozone) CaO (calcium oxide)
Which substances are molecules?
Molecules are substances that are comprised of more than one atom. These atoms may be joined by ionic bonds or covalent bonds. Compounds, specifically, are molecules that combine more than one element; this excludes substances such as oxygen, hydrogen, and nitrogen, all of which naturally exist in a molecular form: O 2, H 2, and N 2.
Are molecules and compounds the same thing?
Molecules and compounds are basically the same thing. The only difference is while every compound is a molecule, not every molecule is a compound. This is why, all molecules have to be two or more atoms, but can be of the same element.