Dark skin focalities: Difference between revisions

Revision as of 03:45, 20 September 2019

Skin with one or more areas that are darker than the surroundings.

Various diagnoses of pigmented skin lesions, by relative incidence upon biopsy, and malignancy potential.

Evaluation is largely based on the relative incidence and malignancy of various differential diagnoses (see pie chart). Main approaches are:

By their relative incidences, one practical approach is:

↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.

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-#REDIRECT [[Skin]]
+{{Top
+|author1=[[User:Mikael Häggström|Mikael Häggström]]
+|author2=
+}}
+[[File:Dark skin focalities.jpg|thumb|center|Dark skin focalities (in this case, from top left and clockwise: Spitz nevus, seborrheic keratosis, elevated melanocytic nevus and melanoma)]]
+==Dark skin focalities==
+Skin with one or more areas that are darker than the surroundings.
+===Microscopic evaluation===
+[[File:Pie chart of incidence and malignancy of pigmented skin lesions.png|thumb|370px|Various diagnoses of pigmented skin lesions, by relative incidence upon biopsy, and malignancy potential.]]
+Evaluation is largely based on the relative incidence and malignancy of various differential diagnoses (see pie chart). Main approaches are:
+*Direct pattern recognition
+*Systematic
+====Pattern recognition====
+<gallery>
+File:Histopathology of melanocytic nevus.jpg|Melanocytic nevus
+File:Histopathology of melanoma, HE.jpg|Melanoma
+File:Blue nevus (4 of 4) (2797064219).jpg|Blue nevus
+File:Histopathology of seborrheic keratosis.jpg|Seborrheic keratosis
+</gallery>
+====Systematic====
+By their relative incidences, one practical approach is:
+*Is it a '''[[Dysplastic nevus|dysplastic (melanocytic) nevus]]'''? If not:
+*Is it a '''[[Melanoma]]'''? If not:
+*Compare to patterns of various other possibilities.
+{{Bottom}}