Actinic keratosis / Bowen's disease / keratoacanthoma / squamous cell carcinoma

From dermoscopedia

Main PageNon melanocytic lesionsActinic keratosis / Bowen's disease / keratoacanthoma / squamous cell carcinomaActinic keratosis
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 Editor: Iris Zalaudek

 Author(s): Teresa Deinlein     ·  Iris Zalaudek
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Description This chapter covers keratinocytic tumors
Author(s) Teresa Deinlein · Iris Zalaudek
Responsible author Iris Zalaudek→ send e-mail
Status released
Status update June 19, 2019
Status by Ralph P. Braun


This chapter covers keratinocytic tumors

It has the following subchapters:

Actinic keratosis Florentia Dimitriou, Teresa Deinlein, Iris Zalaudek
Squamous cell carcinoma in situ / Bowens disease Florentia Dimitriou, Teresa Deinlein, Iris Zalaudek
Keratoacanthoma Florentia Dimitriou, Teresa Deinlein, Iris Zalaudek
Squamous cell carcinoma Florentia Dimitriou, Teresa Deinlein, Iris Zalaudek


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Actinic (solar) keratosis (AKThis glossary term has not yet been described.), Bowenalso known as squamous cell carcinoma in situ[1] is a neoplastic skin disease. It can be considered as an early stage or intraepidermal form of squamous cell carcinoma. It was named after John T. Bowen’s diseaseThis glossary term has not yet been described. (BD), keratoacanthomaThis glossary term has not yet been described. (KA), and squamous cell carcinomaThis glossary term has not yet been described. (SCCSquamous cell carcinoma) comprise the spectrum of premalignant and malignant keratinizing tumors. In contrast to the well-defined dermoscopic criteriameasure of how well one variable or set of variables predicts an outcome of pigmented tumors, the dermoscopic features of these, mostly non-pigmentedThis glossary term has not yet been described. keratinizing tumors, are less well established. Most of the described dermoscopic patternsThis glossary term has not yet been described. are based on case series. The dermoscopic 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 these tumors is mainly based on the assessment of vascular patterns. The architectural arrangementThis glossary term has not yet been described. and distribution of the vesselsThis glossary term has not yet been described. within the lesion and the correlation with the clinical assessment (e.g. texture, firmness) may provide improved specificityThis glossary term has not yet been described.. Other associated, but nonspecific features are erythema, scale, erosionThis glossary term has not yet been described. or keratin. Since their diagnosis is mostly based on the ability to visualize blood vesselsare the part of the circulatory system, and microcirculation, that transports blood throughout the human bodyThis glossary term has not yet been described. under dermoscopyThe 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., the use of polarized lightThis glossary term has not yet been described. dermoscopy instruments is preferred as it seems to provide the best method to visualize vascular structuresThis glossary term has not yet been described.. In addition, using a viscous immersionThis glossary term has not yet been described. medium, such as ultrasound gel, when applying contact dermoscopy, will allow for better visualization of the vascular structures as it eliminates the effect of pressure-induced compression of blood vessels.



ReferencesThis is material contained in a footnote or bibliography holding further information.

  1. An Atlas of DermoscopyThe 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., Second Edition. Marghoob A. et al. CRC Press; 2012.
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  12. 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 cancerThis glossary term has not yet been described./ keratinocyte carcinoma: a review of diagnostic accuracyThis glossary term has not yet been described. of nonmelanoma skin cancer diagnostic tests and technologies. Dermatol Surg, 33, 1158–74.
  13. Pan Y., Chamberlain AJ., Bailey M., et al., 2008, Dermatoscopy aids in the diagnosis of the solitary red scaly patch or plaque-features distinguishing superficial basal cell carcinoma, intraepidermal carcinoma, and psoriasisThis glossary term has not yet been described.. J Am Acad Dermatol,59, 268–274.
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