Dermatology. Basic skin leisons ( primary and secondary)pptx

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1. BASIC SKIN LESIONS AND THEIR MORPHOLOGY -IDA PEARLINE.P 2 nd YEAR M.B.B.S

2. OBJECTIVES TYPES OF LESONS PRIMARY LESIONS SECONDARY LESIONS SPECIAL LESIONS SUMMARY

3. TYPES OF SKIN LESIONS PRIMARY LEISONS: INITIAL LESION OF A DISEASE SECORDARY LESIONS: PROGRESSION OF PRIMARY LESIONS SPECIAL LESIONS: LESIONS SPECIFIC TO A PARTICULAR DISEASE

4. MACULE IT IS CIRCUMSCRIBED FLAT LEISON OF SKIN IT IS VISIBLE BUT CAN’T BE FELT MAY BE HYPO OR HYPERPIGMENTED Becker’s nevus Mongolian spots secondary syphilis Tinea versicolor

5. PATCH MACULE GREATER THAN 1CM Melasma Vitiligo

6. PAPULES SMALL SOLID ELEVATION <1CM IN DIAMETER MAY BE OF VARIOUS COLOURS Molluscum contagiosum Acne

7. PLAQUE Psoriasis Tinea corporis SOLID ELEVATION GREATER THAN 1CM IN DIAMETER

8. NODULES GROWTH OF ABNORMAL TISSUES DEVELOP 1CM BELOW THE SKIN SOLID ELEVATION THAT IS MORE FELT THAN SEEN VESICLES FLUID FILLED ELEVATION <1CM Hemangioma

9. BULLA FLUID FILLED ELEVATED LESION GREATER THAN 1CM PUSTULES BULLA CONTAINING PUS Bullous pemphigoid Pustular psoriasis

10. PINPOINT,UNRAISED ROUND RED SPOTS DUE TO EXTRAVASATION OF RBCs INTO DERMIS < 4MM IN DIAMETER 4MM-10MM IN DIAMETER Rocky Mountain spotted fever PETECHIAE PURPURA ECCHYMOSIS >1CM IN DIAMTER

11. WHEAL A SAC LIKE CONTAIN LIQUID OR SEMISOLID MATERIAL CYST TRANSIENT SWELLING OF SKIN DISAPPEARING AFTER 24 -48hrs LINEAR DERMOGRAPHISM URTICARIA

12. SECONDARY LESIONS EXCESS DEAD EPIDERMAL CELLS THAT ARE PRODUCED BY ABNORMAL KERATINIZATION AND SHEDDING REMOVAL OF SCALES REVEALS DRY SURFACE PSORIASIS SCALING

13. EROSION DUE TO COMPLETE OR PARTIAL LOSS OF VIABLE EPIDERMIS WITH NO (MINIMAL) LOSS OF DERMIS Tinea pedis

14. fissure Cracks in feet IT IS A LINEAR LOSS OF CONTINUITY OF SKIN DUE TO EXCESSIVE TENSION

15. ULCER A FOCAL LOSS OF EPIDERMIS AND / OR DERMIS SCARRING DEPENDS ON THE DEPTH OF ULCER CHANCROID PYRODERMA

16. CRUST DRIED EXUDATE OF BODY FLUIDS ( BLOOD / SEROUS FLUIDS ) YELLOW / RED TENIA CAPITIS IMPETIGO

17. LICHENIFICATION RESPONSE OF THE SKIN TO REPEATED SCRATCHING. IT IS TYPICALLY SEEN IN LICHEN SIMPLEX CHRONICUS AND ATOPIC DERMATITIS LICHEN SIMPLEX CHRONICUS ATOPIC DERMATITIS

18. SCAR REPLACEMENT OF NORMAL SKIN BY FIBROUS TISSUE IN THE PROCESS OF HEALING OF DAMAGED SKIN ACNE SCAR BURN SCAR KELOIDS

19. SPECIAL LESIONS BURROW: SERPENTINE TUNNEL FORMED BY FEMALE SARCOPTES SCABIEI FOR LAYING EGGS MALE DIES AFTER COPULATION

20. COMEDONES TINY PLUG PRESENT AT THE OPENING OF HAIR FOLLICLE FORMED BY KERATIN AND SEBUM TWO TYPES : OPEN (BLACK HEAD), CLOSED (WHITE HEAD)

21. MILIUM TINY SUPERFICIAL CYST WITH EPIDERMAL LINING MILIA ARE SEEN ON FACE AT PERIORBITAL REGION.

22. SUMMARY CAN YOU GUESS?