Detectable by 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., Collision tumors/lesions of the skinThis glossary term has not yet been described. can occur in all possible combinations of the different growths of the epidermal and/or dermal cell layers (Table 1 & Figure 1).
- They are associated with advancing ageprocess of becoming older and cumulative UV-exposure.
- Compared with combinations of epidermal-dermal collision tumors, epidermal-epidermal collision tumors are more likely to be found in older patients and on the head and neck areas. In addtion, Collision tumors with a basal cell carcinomais the most common skin cancer, and one of the most common cancers in the United States. While BCC has a very low metastatic risk, this tumor can cause significant disfigurement by invading surrounding tissues component are more common on the head and neck compared to collision tumors with a melanocyticThis glossary term has not yet been described. component that are more common on the trunk.
- Collision tumors pose a diagnostic challenge. To correctly diagnose any possible collision tumorThis glossary term has not yet been described./lesion, the dermoscopic analysis of colorsThis glossary term has not yet been described. and structuresThis glossary term has not yet been described. must be performed in all four "quadrants" of the inspected lesion.
- Using both polarized and non-polarized dermoscopy may be helpful in 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 these lesions.
Table 1 - Skin lesions or tumors with their original cell types of the different skin layers (focused only on skin lesions detectable by dermoscopy).
ReferencesThis is material contained in a footnote or bibliography holding further information.:
- An Atlas of Dermoscopy, Second Edition. Marghoob A. et al. CRC Press; 2012.
- Blum et al.: Collision skin lesions-results of a multicenter study of the International Dermoscopy Society (IDS). Dermatol Pract Concept 2017;7:51-62. PMID: 29230351. DOI.
- Braga et al.: Melanoma mimicking seborrheic keratosis: an error of perception precluding correct dermoscopic diagnosis. J. Am. Acad. Dermatol. 2008;58:875-80. PMID: 18328596. DOI.
- Kittler et al.: Standardization of terminology in dermoscopy/dermatoscopy: Results of the third consensus conference of the International Society of Dermoscopy. J. Am. Acad. Dermatol. 2016;74:1093-106. PMID: 26896294. DOI.
- Wang et al.: Differences in dermoscopic images from nonpolarized dermoscope and polarized dermoscope influence the diagnostic accuracy and confidence level: a pilot study. Dermatol Surg 2008;34:1389-95. PMID: 18637816. DOI.