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DIAGNOSIS OF SKIN DISEASE Dr. HADAF A. HASAN
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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.
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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.
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Diagnosis of Skin Disease Careful history & accurate physical examination Keen eyes ± magnifying lens Skin diseases have specific morphologies –Primary lesions –Secondary lesions
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PRIMARY LESIONS MACULE & PATCH PAPULE, PLAQUE & NODULE BLISTERS & PUSTULES WHEAL PURPURA ABCESS TELANGECTASIA & COMEDO
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SECONDARY LESIONS SCALE & CRUST EROSION, FISSURE & ULCER SINUS EXCORIATIONS ATROPHY & SCARRING LICHENIFICATION
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SPECIAL PHENOMENA KOEBNER’S PHENOMENON NIKOLISKY’S SIGN AUSPITZ’S SIGN
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PATHOLOGICAL TERMS HYPERKERATOSIS &PARAKERATOSIS ACANTHOSIS & ACANTHOLYSIS SPONGIOSIS DYSKERATOSIS
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Other aids to diagnosis Visual recognition is the best tool. Diascopy Dermatoscopy Wood’s lamp Mycological examination Lab investigations Bacterial examination
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Other aids to diagnosis Direct examination for sabies & lice Cytology( tzank’s smear) Patch test Prick test Histology & immunofluorescence Electrone microscopy
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Bye bye Next lecture is bacterial infections
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