skin neoplasms

• callus

  hardening of collagen on high friction areas
• keloid

  swelling and pigmentation scar
• keratosis

  thickened area of the epidermis
• leukoplakia

  white, thickened patches on tongue or cheek
• nevus (plural nevi)

  pigmented lesion
• verruca

  warts caused by virus
• basal cell carcinoma

  malignant tumor of the basal cell layer of the epidermis
• squamous cell carcinoma

  malignant tumor of the squamous epithelial cells of the epidermis
• ABCD's of malignant melanoma

  A = Asymmetry

  B = Border (irregular or circumscribed)

  C = Color variation

  D = diameter (usually larger than 6mm)
• kaposi sarcoma

  malignant, vascular, neoplastic growth characterized by cutaneous nodule