SECONDARY (modified) LESIONS
ðSCALE
ðVisible thickened stratum cornium.
ðScales are dry and whitish in color.
ðExample: icthyosis, seborrheic dermatitis and psoriasis.
ðCRUST
ðLiquid debris (serum or pus) that has dried on the surface of the skin.
ðMost frequently crust results from breakage of vesicles, pustule or bullae.
ðExample: impetigo.
ðErosion
ðAn area of skin from which total or part of the epidermis has been lost.
ðExample: aphthous stomatitis, secondary lesions of herpes simplex and herpes zoster.
ðErosions are nonscaring.
ðExcoriation
ðLinear erosion induced by scratching.
ðExample: insect bites and eczema.
ðFissure
ðA slit in the skin.
ð Example: eczema of fingers and intertrigo.
SECONDARY (modified) LESIONS
ðUlcer
ðAn area of skin from which the whole of the epidermis and at least the upper part of the dermis have been lost.
ðExamples: Venous stasis ulcer, pyoderma gangrenosum and the chancare of primary syphilis.
STRIA
►A streak-like linear, atrophic, pink, purple or white lesion of the skin due to changes in the connective tissue.
►Example: Corticosteroid therapy.
Scar
►The result of healing. In which normal structures are permanently replaced by fibrous tissue.
►Example: In course of acne, H. zoster and following burn.
Atrophy
►Thinning of skin due to diminution of the epidermis,
dermis and subcutaneous fat.
