1. DIAGNOSIS OF SKIN DISEASE Dr. HADAF A. HASAN

2. Diagnosis of Skin Diseases Functions of the skin: Protection: Against chemicals, microbes, ultraviolet light. Temperature regulation. Shock absorber. Sensory organ. Psychosocial as a beauty organ. Heat insulation.

3. Functions of the skin Calorie reserve. Vitamin D synthesis. Immune organ Body odor. Sebum production. Preservation of a balanced internal environment. Prevents loss of water & electrolytes.

4. Diagnosis of Skin Disease Careful history & accurate physical examination Keen eyes ± magnifying lens Skin diseases have specific morphologies –Primary lesions –Secondary lesions

5. PRIMARY LESIONS MACULE & PATCH PAPULE, PLAQUE & NODULE BLISTERS & PUSTULES WHEAL PURPURA ABCESS TELANGECTASIA & COMEDO

6. SECONDARY LESIONS SCALE & CRUST EROSION, FISSURE & ULCER SINUS EXCORIATIONS ATROPHY & SCARRING LICHENIFICATION

7. SPECIAL PHENOMENA KOEBNER’S PHENOMENON NIKOLISKY’S SIGN AUSPITZ’S SIGN

8. PATHOLOGICAL TERMS HYPERKERATOSIS &PARAKERATOSIS ACANTHOSIS & ACANTHOLYSIS SPONGIOSIS DYSKERATOSIS

9. Other aids to diagnosis Visual recognition is the best tool. Diascopy Dermatoscopy Wood’s lamp Mycological examination Lab investigations Bacterial examination

10. Other aids to diagnosis Direct examination for sabies & lice Cytology( tzank’s smear) Patch test Prick test Histology & immunofluorescence Electrone microscopy

11. Bye bye Next lecture is bacterial infections