Hairpin vessels

From dermoscopedia

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Hairpin VesselsThis glossary term has not yet been described.[1]

Hairpin (looped) vesselsThis glossary term has not yet been described. are characterized by vessels that resemble hairpins, consisting of a U-shape with a sharp bend at one end. These looped hairpin vessels can appear distorted when the hairpin configuration twists around its own axis.
Hairpin vessels schematics.jpg

Differential 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

Hairpin vessels are found in melanocyticThis glossary term has not yet been described. and nonmelanocyticThis glossary term has not yet been described. tumors. Relatively thin, uniform hairpin vessels are often seen in keratinizing tumors, such as seborrheic keratosesThis glossary term has not yet been described. (SKs). In these benignis any condition that is harmless in the long run keratinizing tumors, a whitish halo often surrounds the vessels. This whitish halo probably represents viable tumor keratinocytes surrounding the dermal papilla, which contains the hairpin vessel. In a study of pigmented SKs, hairpin vessels were seen in 63% of lesions; more specifically, these vessels were seen in 50% of plaque-type SKs and 43% of papular/nodular SKs but were only seen in 6% of patch type SKs[2]. In another study looking at lesions with vascular dermoscopic structuresThis glossary term has not yet been described., 51.2% of SKs contained hairpin vessels, conferring a PPV of 70%[3]. In keratoacanthomas, hairpin vessels are located peripherally, with a yellow keratotic center. In contrast, hairpin vessels in melanomas are often surrounded by a pink halo. Hairpin vessels may also be observed in wartsThis glossary term has not yet been described., SCCs, BCCs, dermal neviThis glossary term has not yet been described., and Spitz neviThis glossary term has not yet been described..



Hairpin vessels.JPG


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.
  2. Braun et al.: Dermoscopy of pigmented seborrheic keratosisThis glossary term has not yet been described.: a morphological study. Arch Dermatol 2002;138:1556-60. PMID: 12472342.
  3. Argenziano et al.: Vascular structuresThis glossary term has not yet been described. in skin tumors: a 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. study. Arch Dermatol 2004;140:1485-9. PMID: 15611426. DOI.