Kaposi’s sarcoma

From dermoscopedia
(1 vote)
Description Dermoscopy of Kaposi sarcoma
Author(s) Pedro Zaballos · Ignacio Gómez Martín
Responsible author Pedro Zaballos→ send e-mail
Status unknown
Status update August 15, 2017
Status by Ralph P. Braun

Vascular proliferation caused by human herpesvirus-8 (HHV-8). It is considered a low-grade malignant vascular tumor. There are four recognized clinical subsets of Kaposi’s sarcoma: classic, endemic, iatrogenic, and HIV related. Clinically the cutaneous lesions begin as reddish-blue macules or plaques that gradually enlarge and become nodular.


  • Homogeneous pattern with differing colors (i.e., whitish, pinkish, reddish, bluish, or violaceous) in different lesions in the same patient.
  • Rainbow-like appearance: multicolored areas showing various colors of the rainbow spectrum. This sign is not pathognomonic of Kaposi’s sarcoma and it is only seen with polarized light dermoscopy.
  • Whitish structureless areas, vascular structures, scale, and a white collarette may also be seen.
Vascular Figure 6.jpg

  1. Cheng et al.: Rainbow pattern in Kaposi's sarcoma under polarized dermoscopy: a dermoscopic pathological study. Br. J. Dermatol. 2009;160:801-9. PMID: 19067686. DOI.
  2. Vázquez-López et al.: Dermoscopic rainbow pattern in non-Kaposi sarcoma lesions. Br. J. Dermatol. 2009;161:474-5. PMID: 19438855. DOI.
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