Polymorphous vessels

From dermoscopedia

Main PageVascular structuresPolymorphous vessels
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 Authored by: Ralph P. Braun

 Keywords:   polymorphous vessels · melanoma
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Description Describes dermoscopyDermoscopy is a non invasive diagnostic method. of polymorphous vesselsmultiple types of vessels are present may indicate malignancy in appropriate context for example in flat melanocytic lesions
Author(s) Ralph P. Braun
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Status released
Status update June 29, 2017
Status by Ralph P. Braun
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Polymorphous VesselsThis glossary term has not yet been described.[1]

Polymorphous vesselsmultiple types of vessels are present may indicate malignancy in appropriate context for example in flat melanocytic lesions are used to describe the vasculature of lesions in which two or more types of vessel morphologies are detected. The presence of polymorphous vessels may suggest a diagnosisThis glossary term has not yet been described. of melanomaThis glossary term has not yet been described.. The most common combination of vessel types seen in melanoma is the presence of both dotted vesselstiny pinpoint vessels flat melanocytic lesions inflammatory diseases Bowen disease and linear–irregular vesselsThis glossary term has not yet been described.. In a study of lesions with vascular features seen on dermoscopy, only 20% of the lesions contained polymorphous structures, which correlated with a PPV of 52.6% for melanoma. More specifically, the combination of dotted and linear–irregular vessels was found in 18% of AHM but only extremely rarely in other nonmelanoma amelanotic/hypomelanotic lesions (1.8% of AHNML and 0% of AHBML). Polymorphous vessels in combinations other than dotted vessels and linear–irregular vessels may be observed in cutaneous melanoma metastases. They can also be seen in papillomatous melanocyticThis glossary term has not yet been described. neviThis glossary term has not yet been described. and other tumors, such as eccrine poromas.

Polymorphous vessels schematics.jpg

References:
  1. An Atlas of Dermoscopy, Second Edition. Marghoob A. et al. CRC Press; 2012.