Skin Lesion

A Skin Lesion is a skin condition that ...

• Context:
  • It can range from being a Primary Skin Lesions, Secondary Skin Lesion.
  • It can be classified by a Skin Lesion Classification System (that solves a skin lesion classification task).
  • ...
• Example(s):
  • Telangiectasia.
  • ...
  • …
• Counter-Example(s):
  • a Wound.
• See: Telangiectasia, Trombiculidae, Papule, Nodule (Medicine), Neoplasm, Blister, Serous, Seropurulent, Pus, Cyst, Evanescent (Dermatology), Injection (Medicine).

---

---

References

2022

• (Wikipedia, 2022) ⇒ https://en.wikipedia.org/wiki/Skin_condition#Lesions
  • https://en.wikipedia.org/wiki/Skin_condition#Primary_lesions
    • Macule: A macule is a change in surface color, without elevation or depression, so nonpalpable, well or ill-defined, variously sized, but generally considered less than either 5 or 10 mm in diameter at the widest point.
    • Patch: A patch is a large macule equal to or greater than either 5 or 10 mm across, depending on one's definition of a macule. Patches may have some subtle surface change, such as a fine scale or wrinkling, but although the consistency of the surface is changed, the lesion itself is not palpable.
    • Papule: A papule is a circumscribed, solid elevation of skin with no visible fluid, varying in size from a pinhead to less than either 5 or 10 mm in diameter at the widest point.
    • Plaque: A plaque has been described as a broad papule, or confluence of papules equal to or greater than 10 mm, or alternatively as an elevated, plateau-like lesion that is greater in its diameter than in its depth.
    • Nodule: A nodule is morphologically similar to a papule in that it is also a palpable spherical lesion less than 10 mm in diameter. However, it is differentiated by being centered deeper in the dermis or subcutis.
    • Tumor: Similar to a nodule, but it is larger than 10 mm in diameter.* Vesicle: A vesicle is small blister, a circumscribed, fluid-containing, epidermal elevation generally considered less than either 5 or 10 mm in diameter at the widest point. The fluid is clear serous fluid.* Bulla: A bulla is a large blister, a rounded or irregularly shaped blister containing serous or seropurulent fluid, equal to or greater than either 5 or 10 mm, depending on one's definition of a vesicle.
    • Pustule: A pustule is a small elevation of the skin containing cloudy or purulent material (pus) usually consisting of necrotic inflammatory cells. These can be either white or red.
    • Cyst: A cyst is an epithelial-lined cavity containing liquid or a semisolid or solid material.
    • Wheal: A wheal is a rounded or flat-topped, pale red papule or plaque that is characteristically evanescent, disappearing within 24 to 48 hours. The temporary raised bubble of taut skin on the site of a properly delivered intradermal (ID) injection is also called a welt, with the ID injection process itself frequently referred to as simply "raising a wheal" in medical texts.
    • Telangiectasia: A telangiectasia represents an enlargement of superficial blood vessels to the point of being visible.
    • Burrow: A burrow appears as a slightly elevated, grayish, tortuous line in the skin, and is caused by burrowing organisms.

---