Part I. The pathologist's view -- 1. What is Atypical Junctional Melanocytic Hyperplasia? -- 2. What is Dysplastic Nevus? -- 3. What is Hypersensitivity Reaction? -- 4. What is Spongiotic Dermatitis? -- 5. What is Psoriasiform Dermatitis? -- 6. What is Lichenoid Dermatitis? -- 7. What is Granulomatous Dermatitis? -- 8. What is Dermatitis with Epidermotropism? -- 9. What is Drug Eruption? -- 10. What is Pseudolymphoma? -- Part II. The clinician's view -- 11. Reddish Facial Papules -- 12. Face infiltrated Plaques/Nodules -- 13. Patchy Alopecia -- 14. Diffuse Smooth Alopecia -- 15. Follicular Pustules of the Scalp -- 16. Scaly Scalp -- 17. Oral Erosions -- 18. Vulvar Lesions -- 19. Penile Lesions -- 20. Diffuse Leg Induration -- 21. Subcutaneous Leg Nodules -- 22. Leg Ulcers -- 23. Follicular Papules and Pustules - Trunk -- 24. Palmoplantar Red Hyperkeratosis -- 25. Skin Folds Diffuse Rash -- 26. Exfoliative Erythroderma -- 27. Generalized Pruritus -- 28. Photo-Eruptions -- 29. Hypopigmented Patches -- 30. Pigmented Patches -- 31. Red Smooth Patches -- 32. Red Scaly Patches -- 33. Red Sloughing Patches -- 34. Red Scaly Papules -- 35. Red Non-facial Papules -- 36. Papulo-nodular Lesions with Scale and/or Crust -- 37. Edematous Smooth Plaques -- 38. Sclerotic Plaques -- 39. Diffuse Sclerosis -- 40. Purpuric Lesions -- 41. Blisters.