case_images: PMC6537059_01
case_images: Violaceous exophytic mass arising within the surgical wound.
case_images: 10.1177_2050313X19847359-fig1.jpg
case_images: PMC6537059_01_10.1177_2050313X19847359-fig1.jpg
case_images: fig1-2050313X19847359
case_images: The tumor proved to be highly aggressive as within 2  months a new violaceous necrotic mass had rapidly emerged within the surgical wound (Figure 1).
case_images: Surgical resection extending to the level of the deep fascia.
case_images: 10.1177_2050313X19847359-fig2.jpg
case_images: PMC6537059_01_10.1177_2050313X19847359-fig2.jpg
case_images: fig2-2050313X19847359
case_images: This time, an extensive surgical resection extending to the deep fascia was performed (Figure 2).
case_images: Sheets of poorly differentiated pleomorphic neoplastic cells invading the
  dermis, with numerous mitoses (hematoxylin and eosin, original magnification
  x 40).
case_images: 10.1177_2050313X19847359-fig3.jpg
case_images: PMC6537059_01_10.1177_2050313X19847359-fig3.jpg
case_images: fig3-2050313X19847359
case_images: Indeed, microscopy now showed an infiltrating poorly differentiated SCC composed of islands of atypical sarcomatoid spindle cells (Figure 3), staining positive for CK5/6, CKAE1/AE3, p63, and vimentin.