Dark skin focalities: Difference between revisions
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[[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)]] | [[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)]] | ||
==Fixation== | |||
{{Skin fixation, minimal}} | |||
==Dark skin focalities== | ==Dark skin focalities== | ||
Revision as of 03:46, 20 September 2019
Author:
Mikael Häggström [note 1]
Fixation
- Generally: Buffered 4% formaldehyde.[1]
Dark skin focalities
Skin with one or more areas that are darker than the surroundings.
Microscopic evaluation
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
-
Melanocytic nevus
-
Melanoma
-
Blue nevus
-
Seborrheic keratosis
_(2797064219).jpg){kind=link}
Systematic
By their relative incidences, one practical approach is:
- Is it a dysplastic (melanocytic) nevus? If not:
- Is it a Melanoma? If not:
- Compare to patterns of various other possibilities.
Notes
- ↑ 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.
Main page
References
- ↑ Katarzyna Lundmark, Krynitz, Ismini Vassilaki, Lena Mölne, Annika Ternesten Bratel. Handläggning av hudprover – provtagningsanvisningar, utskärningsprinciper och snittning (Handling of skin samples - Instructions for sampling, cutting and incision. KVAST (Swedish Society of Pathology). Retrieved on 2019-09-09.
Image sources