2 derm pattern recognition 1

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  • 1. CASE STUDIES IN DERMATOLOGIC PATTERN RECOGNITION Part 1

2. PATTERN RECOGNITION IS THE CAPACITY TO DESCRIBE A RASH OR LESION USING A VARIETY OF PHYSICAL CHACTERISTICS IN ORDER TO LIMIT THE DIFFERENTIAL DIAGNOSIS 3. PHYSICAL CHARACTERISTICS OF ALL RASHES AND LESIONS 1.BASIC MORPHOLOGY 2.SIZE 3.SHAPE 4.COLOR 5.PATTERN 6.DISTRIBUTION 4. EXAMLPES OF BASIC MORPHOLOGY 1.MACULE AND PATCH 2.PAPULE AND NODULE 3.PUSTULE 4.WHEAL 5.VESICLE AND BULLA 6.PLAQUE 5. MACULES AND PATCHES MACULES ARE FLAT AND THEREFORE NOT RECOGNIZED BY TOUCH BUT RATHER A CHANGE IN COLOR FROM YHE SURROUNDING SKIN. PATCHES ARE LARGER MACULES 6. MONGOLIAN SPOTS 7. PAPULES AND NODULES PAPULES ARE ELEVATED SOLID LESIONS UP TO.5 CM IN DIAMETER. NODULES ARE LARGER THAN PAPULES 8. NEUROFIBROMA 9. PUSTULES PUSTULES ARE EPIDERMAL OR UPPER DERMAL COLLECTIONS OF PUS. ABSCESSES ARE DEEPER PUSTULES 10. BULLOUS IMPETGO 11. ABSCESSES 12. WHEALS WHEALS ARE ROUNDED PALE RED PAPULES OR PLAQUES CAUSED BY THE EXTRAVASATION OF FLUID 13. URTICARIA 14. VESICLES AND BULLAE VESICLES ARE LESIONS FORMED BY FLUID CREATING A CLEAVAGE PLANE BENEATH THE STRATUM CORNEUM. BULLAE ARE LARGER VESICLES 15. IMPETIGO 16. PLAQUES PLAQUES ARE RAISED LESIONS WITH A FLAT TOP. THE RISE IN ELEVATION IS MUCH LESS THAN YHR WIDTH OF THE LESION 17. PSORIASIS 18. EXAMLPLES OF LESION SHAPE 1.ANNULAR.. Like a ring 2.NUMMULAR like a coin 3.LINEAR 4.OVAL 5.TARGET 6.SERPIGENOUS 7.RETICULATE .. Forming a network 8.STELLATE star like 19. ANNULAR ANNULAR LESIONS ARE CIRCULAR AND HAVE A CENTER WITH AN APPEARANCE DIFFERENT FROM THEIR EDGE OR BORDER 20. KERATOACANTHOMA 21. NUMMULAR NUMMULAR LESIONS TAKE ON THE APPEARANCE OF A FILLED CIRCLE OR COIN 22. NUMMULAR ECZEMA 23. LINEAR LINEAR LESIONS ARE LONG RELATIVE TO THEIR WIDTH AND GENERALLY STRAIGHT 24. KELOID 25. OVAL THE WORD IS SELF EXPLANATORY 26. FIXED DRUG ERUPTION 27. TARGET TARGET LESIONS ARE MADE UP OF CONCENTRIC CIRCLES OF WHITE AND RED FORMING A BULLSEYE APPEARANCE 28. ERYTHEMA MULTIFORME 29. SERPIGENOUS LESIONS THAT ARE LONG AND WAVEY WITH A SNAKE-LIKE APPEARANCE 30. LARVA MIGRANS 31. RETICULATE LESIONS WITH AN INTERCONNECTED OR LACE- LIKE APPEARANCE 32. STRETCH MARKS 33. STELLATE LESIONS WITH A STAR-LIKE APPEARANCE USUALLY FROM A RADIAL SPREAD FROM A CENTRAL FOCUS 34. SUPERFICIAL VARICOSITIES 35. EXAMPLES OF LESION PATTERN 1.GROUPED 2.DISSEMINATED 3.DERMATOMAL 4.SYMMETRIC 5.PHOTOSENSITIVE 6. CONFLUENT 7.INTERTRIGENOUS 36. GROUPED MULTIPLE SIMILAR LESIONS ORGANIZED IN CLOSE PROXIMITY 37. GENITAL WARTS 38. DISSEMINATED LESIONS WHICH ARE SCATTERED RANDOMLY OVER ALL OR MOST OF THE BODY 39. GENERALIZED DRUG REACTION 40. DERMATOMAL LESIONS THAT FOLLOW THE PATH OF A PERIPHERAL SENSORY NERVE 41. HERPES ZOSTER 42. SYMMETRIC LESIONS THAT ARE MIRROR IMAGES OF EACHOTHER FROM ONE SIDE OF THE BODY TO THE OTHER 43. ONYCHOMYCOSIS 44. PHOTOSENSITIVE LESIONS LIMITED TO THE SUN EXPOSED PARTS OF THE BODY 45. PHOTOSENSITIVE DRUG ERUPTION 46. CONFLUENT THE PROCESS OF SMALLER LESIONS COMING TOGETHER UNTIL THEY FORM A LARGE LESION BY MERGING 47. TINEA CORPORIS 48. INTERTRIGENOUS LESIONS THAT ARE LOCATED BETWEEN SKIN FOLDS SUCH AS THE AXILLA, GROIN OR BETWEEN FINGERS OR TOES 49. LESION SIZE USUALLY DESCRIBED IN MILLIMETERS OR CENTIMETERS 50. EXAMPLES OF LESION OR RASH COLOR 1.HYOPIGMENTED 2.HYPERPIGMENTED 3.WHITE 4.BLACK 5.BLUE 6.YELLOW 7.VIOLACEOUS 8.VARIEGATED 51. EXAMPLES OF LESION DISTRIBUTION 1.HEAD 2.ORAL 3.AXILLARY 4.TRUNCAL 5.ANOGENITAL 6.INGUINAL 7.DEPENDENT 8.PEDAL