Skin is a mirror of systemic disease. Examination of skin will reveal specific sign of systemic disease.
Skin lesions can be classified as
Primary skin lesions
Skin lesions can be classified as
Primary skin lesions
- Macules are flat lesions < 1cm circumscribed alteration of color of skin <1cm
- Papules are palpable solid elevation < 1cm .Maculopapular rash include both macule and papule
- Plaque are papular lesions of size > 1cm
- Patch is a circumscribed alteration of color of > 1cm.
- Vesicles are lesions < 1 cm these are fluid filled epidermal elevations.
- Bullae are > 1cm fluid filled elevation
- Pustules are epidermal elevations < 1cm containing pus
- Nodule areSolid palpable lesion ->0.5 cm
- Papilloma - Pedunculated projecting lesion
- Wheal - Elevated central white lesion with red margin
- Telangiectasia - Dilated small cutaneous blood vessel
- Petechiae - Pinhead size macule of blood into the skin.
- Purpura -Larger petechiae which do not blanch on pressure
- Ecchymosis -Large extravasation of blood into resulting in haematoma
- Erythema - Redness of the skin.
- Scales—Desquamated epithelium
- Ulcers—Loss of epidermis, dermis and often with loss of underlying tissue
- Crust are dried up exudates
- Scar are replacement by fibrous tissue
- Excoriation are Loss of skin substance produced by scratching
- Fissure—Any linear slit or discontinuity of skin.
