Dermatology Final Exam – Flashcards
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Damages valves in the deep veins of the calf are incompetent at restricting backflow of blood Damage communicating veins connecting deep and superficial calf veins also cause CVI in that blood flows from deep veins to superficial venous plexus -Fibrin is deposited in the extravascular space and undergoes organization, resulting in sclerosis and obliteration of lymphatics and microvasculature
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Venous Stasis Dermatitis Pathophysiology
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Discrete, round to oval, scaly, elevated erythematous papules and plaques, covered with silvery scales Scraping off the scales shows pinpoint bleeding AUSPITZ SIGN
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Characteristics of Psoriasis Vulgaris
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Viral-HHV 7 & 6 Usually resolves between 6 -14 weeks-not contagious Herald patch found anywhere on the body, Christmas tree pattern
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Characteristics of Pityriasis Rosea
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These should be removed, skin grafting for large lesions, use of skin expanders or other technique such as electrosurgery, curttage, laser.
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Congenital Nevomelanocytic Nevi treatment
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Risk factors: light skinned and those with decreased tanning ability or if you've had previous x-ray therapy. Pigmented, sclerosing, superficial, ulcerating, nodular May have smaller telangiectasias, especially check nasolabial folds, inner and outer corners of the eyes Locally invasive, aggressive, and destructive, but rarely metastasizes
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Characteristics of Basal Cell Carcinoma
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Higher risk of conversion to squamous cell carcinoma, usually in mouth Combined effects of tobacco use and alcohol consumption are found to be multiplicative
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Erythroplakia risk factors and characteristics
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Usually seen in the mouth but may be seen in the vaginal/vulvar area, white elevated firm plaque, margin often irregular, surface is rough. Cannot be rubbed off. Usually from chronic irritation -smoking, rubbing against dentures or retainers, chewing tobacco, HPV leukoplakia-persistent adherent white patch with no histologic connotation and no implied premalignant potential keratosis-term used when precancerous
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Leukoplakia risk factors and characteristics
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Asymmetry of lesion Borders are irregular Color is multiple or molded Diameter ;5-6mm Evolving/changing, elevating, enlarging SUPERFICIAL SPREADING MOST COMMON
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ABCDEs of malignant melanoma
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Precursor lesion freckling previous nonmelanoma skin cancer history of actinic keratosis previous melanoma family hisoty light skin/red/blond hair blue/green eyes chronic tanning beds immunosuppression
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Risk factors for malignant melanoma
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thickness of the lesion through lymph node involvement Depth of the lesion and analysis of sentinel lymph nodes
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Most significant prognostic factor of malignant melanoma
