Keratoacanthoma

From dermoscopedia

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 Authored by: Florentia Dimitriou     ·  Teresa Deinlein     ·  Iris Zalaudek

 Keywords:   keratoacanthoma · squamous cell carcinoma
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Description This chapter describes the dermoscopyDermoscopy is a non invasive diagnostic method. criteriameasure of how well one variable or set of variables predicts an outcome of KeratoacanthomaThis glossary term has not yet been described.
Author(s) Florentia Dimitriou · Teresa Deinlein · Iris Zalaudek
Owner Iris Zalaudek→ send e-mail
Status released
Status update June 19, 2017
Status by Ralph P. Braun
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Keratoacanthoma is a well-differentiated variant of Squamous cell carcinomaThis glossary term has not yet been described.. Clinically, it is distinguished by its initial rapid growth followed by spontaneous involutionThis glossary term has not yet been described. over a period of a few months.

DermoscopyDermoscopy is a non invasive diagnostic method. criteria:

  • White circles: White ring-like structures within the hair follicle
  • Keratin mass: Centrally located, amorphous, yellow-white to light brown areas without any recognizable structure
  • White structureless areas: Absence of any structure; they may be associated with large targetoid hair follicles

The central keratin plug is an architectural criterion for the diagnosisis the identification of the nature and cause of a certain phenomenon. Diagnosis is used in many different disciplines with variations in the use of logic, analytics, and experience to determine "cause and effect". In systems engineering and computer science, it is typically used to determine the causes of symptoms, mitigations, and solutions of keratoacanthomaThis glossary term has not yet been described. also on the histopathological analysis and may be typically surrounded by elongated and sometimes thick telangiectasias.


Keratoacanthoma schematic.jpg

Vascular architecture of Keratoacanthoma

  • Hairpin vesselsThis glossary term has not yet been described.: Vascular Loops frequently twisted and bending, usually surrounded by whitish halo
  • Linear-irregular vessels: Serpentine or branched Serpentine; irregularly shaped, sized and distributed red structures
  • Glomerular (coiled) vessels: Larger than dotted vesselstiny pinpoint vessels flat melanocytic lesions inflammatory diseases Bowen disease with convoluted morphologyThis glossary term has not yet been described. and often distributed in clusters




References

  1. An Atlas of Dermoscopy, Second Edition. Marghoob A. et al. CRC Press; 2012.
  2. Argenziano, G., Zalaudek, I., Corona, R., et al., 2004, Vascular structuresThis glossary term has not yet been described. in skin tumors: a dermoscopy study. Arch Dermatol, 140, 1485–9.
  3. Kittler, H., Riedl, E., Rosendahl, C. & Cameron, A., 2008, Dermatoscopys the examination of [skin lesions] with a 'dermatoscope'. This traditionally consists of a magnifier (typically x10), a non-polarised light source, a transparent plate and a liquid medium between the instrument and the skin, and allows inspection of skin lesions unobstructed by skin surface reflections. Modern dermatoscopes dispense with the use of liquid medium and instead use polarised light to cancel out skin surface reflections. of unpigmented lesions of the skinThis glossary term has not yet been described.: a new classificationis a general process related to categorization, the process in which ideas and objects are recognized, differentiated, and understood. of vessel morphology based on pattern analysisThis glossary term has not yet been described.. Dermatopathol Pract Conc, 14, 4.
  4. Kreusch, J. & Koch, F., 1996, Auflichtmikroskopische Charakterisierung von Gefassmustern in Hauttumoren. Hautarzt, 47, 264–72.
  5. Kreusch, J.F., 2002, Vascular patterns in skin tumors. Clin Dermatol, 20, 248–54.
  6. Mogensen, M. & Jemec, G.B., 2007, Diagnosisis the identification of the nature and cause of a certain phenomenon. Diagnosis is used in many different disciplines with variations in the use of logic, analytics, and experience to determine "cause and effect". In systems engineering and computer science, it is typically used to determine the causes of symptoms, mitigations, and solutions of nonmelanoma skin cancer/ keratinocyte carcinoma: a review of diagnostic accuracy of nonmelanoma skin cancer diagnostic tests and technologies. Dermatol Surg, 33, 1158–74.