Primary Lesions
      -macule
      -patch
      -papule
      -plaque
      -nodule
      -tumor
      -vesicle
      -bulla
      -pustule
      -cyst
 Secondary Lesions
      -scale       
      -crust
      -excoriation
      -lichenification
      -maceration
      -fissure
      -erosion
      -ulcer
 Distinct Lesions
      -wheal/hive
      -burrow
      -comedone
      -atrophy
      -keloid
      -fibrosis
      -petechiae
      -telangiectasis
      -milium

Scale is the accumulation or excess shedding of the stratum corneum
Scale is very important in the differential diagnosis since its presence indicates that the epidermis is involved
Scale is typically present where there is epidermal inflammation, ie. psoriasis, tinea, eczema