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1. By :- Ram Chandra Group :- 318 Skin Pathology

2. Some T cells selectively home to skin by virtue of homing receptors called Cutaneous Lymphocyte Antigen (CLA) Epidermis contains intra epithelial lymphocytes including Gamma / Delta cells

3. Macule

4. Papule

5. Nodule

6. Plaque

7. Vesicle

8. Bulla

9. Pustule

10. Scale

11. Lichenification

12. Excoriation

13. Hyperkeratosis

14. Parakeratosis

15. Acanthosis

16. Dyskeratosis

17. Acantholysis

18. Papillomatosis

19. Lentiginous

20. Spongiosis

21. Acute inflammatory Dermatoses In Acute – mononuclear cells than neutrophils due to their limited course of their natural history Urticaria – more common between 20 – 40 yrs Lesions usually exists for less than 24 hrs Pruritc papule to large edematous plaques

22. Acute Eczematous dermatitis Eczema – red , papulo vesicular oozing crested lesion Later they can develop into raised scaling plaques Most common form is contact dematitis Spongiosis ossurs So called spongiotic dermatitis

23. Erythema multiforme ■ ■ ■ ■ ■ ■ Self limited Hypersensitivity to drugs / infections Drubs – sulphonamides , penicillins , salycylates Infection – HSV , mycoplasma , Fungal infections – Histoplasma Capsulatum and Coccidiodes imitis Multiform lesions – Targetoid lesion – Red papule or macule with a pale vesicular or eroded centre Papules , macules ,vesicles ,bullae

24. Chronic inflammatory Dermatoses Psoriasis Lichen Planus Lichen simplex Chronicus

25. Tumors of skin epithelium Benign and Premalignant Seborrhic keratitis Sebaceous adenoma Actinic keratitis ■ ■ Malignant Squamous cell carcinoma Basal cell carcinoma

26. Tumors of melanocytes 1. Melanocytic nevi ■ ■ Benign Malignant 1. Melanoma

27. Malignant Melanoma