case_images: PMC5726668_01
case_images: Violaceous nodule of 2cm in diameter, with based ulceration, located on
  the left forearm
case_images: abd-92-05-s1-0024-g01.jpg
case_images: PMC5726668_01_abd-92-05-s1-0024-g01.jpg
case_images: f1
case_images: A 52-year-old man was admitted to our clinic, complaining of a violaceous nodule of about 2 cm in diameter located on the left forearm (Figure 1).
case_images: A - Violaceous nodule of 0.7x 0.8cm in diameter, located on
  the right forearm. B - Violaceous nodule of 1x1.5cm in
  diameter with eroded surface, located on the inside portion of the left
  foot.
case_images: abd-92-05-s1-0024-g02.jpg
case_images: PMC5726668_01_abd-92-05-s1-0024-g02.jpg
case_images: f2
case_images: He also presented erythematous-violaceous nodular lesions, some of which were ulcerated, located on the right arm, the back of his right hand, and his left leg and foot (Figure 2).
case_images: A - Histo-pathological evaluation revealed proliferation of
  spindle-shaped cells with cytological atypia, outlining a broad network
  of vascular spaces similar to slits, with some mitotic figures,
  consistent with KS in the nodular phase. Hyaline globules, which are a
  characteristic but not absolutely specific finding of Kaposi's sarcoma,
  are also observed (Hematoxylin, original magnification, X200).
  B - Immunohistochemical analysis for human herpesvirus
  8 (HHV-8) in Kaposi sarcoma revealed a strong immunoreactivity of HHV-8
  (Hematoxylin, original magnification, X200)
case_images: abd-92-05-s1-0024-g03.jpg
case_images: PMC5726668_01_abd-92-05-s1-0024-g03.jpg
case_images: f3
case_images: Histopathological evaluation of the forearm lesion revealed a strong proliferation of spindle-shaped cells with cytological atypia, outlining irregular slits and clefts, which is consistent with the diagnosis of KS (Figure 3).