Epidermal nevi and basal cell carcinoma

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  • 1. Collision tumor of B asal cell carcinoma with Epidermal nevi . F. Peral Rubio, M.D. Department of Dermatology Hospital Universitario Virgen Macarena Seville, Spain
  • 2. Collision tumor of B asal cell carcinoma with Epidermal nevi
    • A 65-years-old women.
    • The patient was referred to us for the assessment of a congenital lesion on the back.
    • The patient has experienced changes 2 years previously.
  • 3.  
  • 4.  
  • 5. Collision tumor of B asal cell carcinoma with Epidermal nevi
    • These are two different lesions:
      • B asal cell carcinoma
      • Epidermal nevi
  • 6. Collision tumor of B asal cell carcinoma with Epidermal nevi
    • The dermoscopic features of this pigmented basal cell carcinoma include:
    • Absence of pigment network
    • Linear and arborising (branch-like) telangiectasia
    • Leaf-like areas
    • Large blue-grey ovoid nests.
    • Multiple blue-grey globules.
  • 7. Linear and arborising (branch-like) telangiectasia
  • 8. Leaf-like areas
  • 9. Large blue-grey ovoid nests
  • 10. Multiple blue-grey globules.
  • 11. Collision tumor of B asal cell carcinoma with Epidermal nevi
    • An epidermal nevi resembles a seborrhoeic keratosis or viral wart, with fissures, crypts and milia.
  • 12. Collision tumor of B asal cell carcinoma with Epidermal nevi
    • The dermoscopic features of this epidermal nevi include:
      • Milia-like cysts
      • Irregular crypts
      • Fissures/ridges
  • 13. Irregular crypts Fissures/ridges
  • 14. Milia-like cysts
  • 15. Collision tumor
  • 16. Collision tumor of B asal cell carcinoma with Epidermal nevi . F. Peral Rubio, M.D. Department of Dermatology Hospital Universitario Virgen Macarena Seville, Spain