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63. Melanocytic lesions (+ introduction to skin lesions): Difference between revisions

63. Melanocytic lesions (+ introduction to skin lesions) (view source)

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(Created page with "== Introduction == Before we begin, we need to know some macroscopic skin lesions. Excoriation is a traumatic skin lesion often caused by scratching its own skin. A red linear mark forms as the epidermis is broken. Lichenification is a thickened and rough skin characterised by prominent skin markings. It’s characteristic for lichen simplex chronicus. It can occur in response to of repeated rubbing or itching of the skin. A macule is a flat, circumscribed lesion less...")
 
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A papule is a circumscribed, solid elevation of the skin less than 5 mm in diameter. If it is greater than 5 mm it’s called a nodule.
A papule is a circumscribed, solid elevation of the skin less than 5 mm in diameter. If it is greater than 5 mm it’s called a nodule.
[[File:Papule.jpg|thumb|Papule. From <nowiki>https://en.wikipedia.org/wiki/Papule</nowiki>]]
 
[[File:Plaque in psoriasis.jpg|thumb|Plaques of psoriasis. From <nowiki>https://fineartamerica.com/featured/5-plaque-psoriasis-on-the-skin-dr-p-marazziscience-photo-library.html</nowiki>]]
A plaque is a flat-topped elevation of the skin, usually greater than 5 mm in diameter.
A plaque is a flat-topped elevation of the skin, usually greater than 5 mm in diameter.
[[File:Purulent-pustule-on-the-skin.jpg|thumb|A pustule. From <nowiki>https://www.shutterstock.com/image-photo/purulent-pustule-on-skin-1126098869?src=okW2hsBN1AkZoZtsYKTGPQ-1-2</nowiki>]]
 
A pustule is a discrete, pus-filled raised lesion.
A pustule is a discrete, pus-filled raised lesion.
[[File:Scaly skin.jpg|thumb|Scaly skin. From <nowiki>https://healthh.com/scaly-skin/</nowiki>]]
 
A scale is a dry, horny, plate-like morphology of the skin.
A scale is a dry, horny, plate-like morphology of the skin.
[[File:Vesicles.jpg|thumb|Vesicles. From <nowiki>https://ufhealth.org/vesicles</nowiki>]]
 
A vesicle is a fluid-filled raised area 5 mm in diameter or less. If greater than 5 mm it’s a blister.<gallery>
 
A vesicle is a fluid-filled raised area 5 mm in diameter or less. If greater than 5 mm it’s a blister.<gallery mode="slideshow">
File:Lichenification.jpg|Lichenification. From <nowiki>https://www.healthline.com/health/lichenification</nowiki>
File:Lichenification.jpg|Lichenification. From <nowiki>https://www.healthline.com/health/lichenification</nowiki>
File:Macule.jpg|Macule. From <nowiki>https://medical-dictionary.thefreedictionary.com/macule</nowiki>
File:Macule.jpg|Macule. From <nowiki>https://medical-dictionary.thefreedictionary.com/macule</nowiki>
File:Papule.jpg|Papule. From <nowiki>https://en.wikipedia.org/wiki/Papule</nowiki>
File:Plaque in psoriasis.jpg|Plaques of psoriasis. From <nowiki>https://fineartamerica.com/featured/5-plaque-psoriasis-on-the-skin-dr-p-marazziscience-photo-library.html</nowiki>
File:Purulent-pustule-on-the-skin.jpg|A pustule. From <nowiki>https://www.shutterstock.com/image-photo/purulent-pustule-on-skin-1126098869?src=okW2hsBN1AkZoZtsYKTGPQ-1-2</nowiki>
File:Scaly skin.jpg|Scaly skin. From <nowiki>https://healthh.com/scaly-skin/</nowiki>
File:Vesicles.jpg|Vesicles. From <nowiki>https://ufhealth.org/vesicles</nowiki>
</gallery>We also need to know some histological terms:
</gallery>We also need to know some histological terms: