Define terms that describe the morphology, shape, and pattern of skin lesions.

Define the terms used to describe morphology and shape of lesions.

Skin lesions can be described in a variety of ways. The most common are:

1. The macule is a flattened, colorless lesion less than one centimeter wide.
2. Patch: A colorless, flat lesion larger than one centimeter.
3. Papules: Solid, raised lesions that are less than 1 cm in diameter.
4. Plaque: A large, raised solid lession with a diameter greater than 1 cm.
5. Vesicle : Small, liquid-filled blister that measures less than one centimeter.
6. Bulla: A large blister with fluid inside that measures more than 1 centimeter.
7. Pustule : A pus-filled raised lesion.
8. Nodule: Solid, raised lesions larger than one centimeter.
9. The term Wheal is used to describe a raised and itchy skin lesion, which can be caused by allergies.
10. The scale is a dry flaky skin patch that can be gray or white.
11. The crust is a scab, or exudate that has dried on the skin.
12. The term erosion is used to describe a shallow and open wound on the skin.
13. The deeper the ulcer, the more it will spread.
14. Fissure (also called a fissure): A small crack or groove on the surface of the skin.
15. Linear: a lesion in which the path is straight.
16. Annular lesion: An oval-shaped lesion.
17. Serpiginous : a lesion with a serpentine or wavy shape.
18. Reticular lesion: A pattern that looks like a net or laces.
19. Targetoid: Lesion with a dark central spot, surrounded by lighter rings and outer dark rings.
20. Morbilliform is a rash similar to measles.