Term
| Name some benign skin lesions of the pidermis? |
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Definition
| seborrheic keratosis, dermatosis papulosa nigra, cysts |
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Term
| T/F Seborrheic keratosis is a premalignant lesion. |
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Definition
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Term
| What percent of black adults have dermatosis papulosa nigra? |
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Definition
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Term
| Dermatosis papulosa nigra is a variant of what type of benign skin lesion? |
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Definition
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Term
| Morgan Freeman's skin lesion= |
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Definition
| dermatosis papulosa nigra |
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Term
| What are the different types of cysts? |
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Definition
| epidermal, pilar, digital mucous |
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Term
| Where are epidermal and pilar cysts typically seen? |
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Definition
| head, neck, and trunk in solitary or multiple lesions |
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Term
| What do epidermal/pilar cysts look like? |
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Definition
| round, slightly elevated nodulocystic lesions with a central puncta; may have associated discharge or become inflammed |
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Term
| What are the differences between epidermal and pilar cysts? |
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Definition
epidermal= mostly on face and trunk, true epidermal lining with granular cell layer and contents are thick and cheesy
pilar= firm cysts almost exclusively on scalp, epidermal lining that lacks a granular cell layer, contents are oily and keratinous, may have calcifications, often dominant inherited |
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Term
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Definition
| tiny epidermal cysts that occur most commonly on the facial area |
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Term
| What is a digital mucous cyst? |
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Definition
| translucent cyst on a terminal digit; has no epidermal lining and may connect to the DIP joint |
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Term
| Name some benign skin lesions of epidermal appendages? |
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Definition
| sebaceous hyperplasia, trichoepithelioma, syringoma |
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Term
| What is the appearance of sebaceous hyperplasia? |
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Definition
| mutliple flat-topped papules with central umbilication that are yellow in color. Usually on the face of middle-aged adults |
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Term
| What age group is affected by trichoepitheliomas most commonly? |
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Definition
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Term
| What is a trichoepithelioma? |
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Definition
| tumor of hair follicle origin or differentiation |
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Term
| How are trichoepitheliomas inherited? |
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Definition
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Term
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Definition
| tumor of eccrine sweat duct |
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Term
| In what patient population are syringomas most common? |
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Definition
| asian women during puberty |
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Term
| Where do syringomas occur? |
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Definition
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Term
| What do syringomas look like? |
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Definition
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Term
| From what structures do cutaneous leiomyomas arise from? |
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Definition
| arrector pili muscles or venous musculature |
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Term
| Patients with cutaneous leiomyoma complain of... |
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Definition
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Term
| What's the difference and similarities between nevus cells and melanocytes? |
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Definition
| both originate from the neural crest and produce melanin pigment; melanocytes occur singularly and have dendrites; nevus cells occur in nests and have no dendrites |
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Term
| Describe a junctional nevus. |
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Definition
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Term
| Describe a compound nevus. |
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Definition
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Term
| Describe a intradermal nevus. |
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Definition
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Term
| Is a nevocellular nevi a premalignant lesion? |
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Definition
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Term
| When should you biopsy a nevocellular nevi? |
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Definition
| changes color/shape/size, bleeding or ulceration, development of satellite lesions |
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Term
| What is the definition of a nevus? |
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Definition
| nondendritic pigment cell; OR an increase or decrease in normal cellular constituents in a normal location |
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Term
| What does a linear epidermal nevus look like? |
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Definition
| verrucous, dirty-gray papules which coalesce in to a serpiginous plaque |
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Term
| What determines where linear epidermal nevus occur? |
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Definition
| they follow the lines of blaschko from embryological development |
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Term
| What is the medical term for "liver spots"? |
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Definition
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Term
| What are becker's nevus made up of? |
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Definition
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Term
| What cells make up solar lentigo? |
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Definition
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Term
| What cells make up cafe au lait spots? |
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Definition
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Term
| What is the medical term for freckle? |
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Definition
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Term
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Definition
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Term
| What is Richard Gere's skin lesion? |
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Definition
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Term
| What is the tyndall effect? |
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Definition
| the way light is scattered by dermal melanocytes to give the lesion a blue color |
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Term
| Which lesions exhibit the tyndall effect? |
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Definition
| blue nevus, mongolian spot, nevus of ota, nevus of ito |
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Term
| A blue lesion on the eye due to a collection of dermal melanocytes is called a... |
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Definition
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Term
| What is the medical term for port wine stain? |
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Definition
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Term
| What causes a nevus flammeus? |
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Definition
| dilatation of capillaries |
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Term
| What is the prognosis of nevus flammeus? |
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Definition
| does NOT resolve, may become nodular over time |
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Term
| What infantile or strawberry hemangioma? |
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Definition
| a benign tumor of endothelial cells causing a proliferation of capillaries |
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Term
| What is the prognosis of infantile hemangioma? |
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Definition
| 75-95% regress by 5-7 years of age |
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Term
| What is a cavernous hemangioma? (appearance, prognosis, etc.) |
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Definition
| a congenital lesion involving larger vessels and deeper structures that is usually blue in color and a compressible mass |
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Term
| What are the components of sturge weber syndrome? |
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Definition
| V1 port wine stain, seizures, glaucoma |
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Term
| What are the features of Klippel Trenaunay syndrome? |
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Definition
| limb hypertrophy + capillary, lymphatic or venous malformation |
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Term
| What are the features of Kassabach Merritt? |
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Definition
| consumptive coagulopathy + hemangioma |
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Term
| What is Maffuci's syndrome? |
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Definition
| dyschondroplasia (fragile bones) and enchondromas |
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Term
| What is Blue rubber Bleb syndrome? |
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Definition
| vascular proliferations of skin and GI tract with GI bleeding |
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Term
| Name some acquired benign skin lesions of blood vessels. |
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Definition
| cherry angioma and venous lake, nevus vasculosis ("spider hemangioma"), pyogenic granuloma |
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Term
| What causes pyogenic granuloma? |
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Definition
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Term
| Whatis the medical term for "spider hemangioma"? |
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Definition
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Term
| In what patient population are cherry angiomas/venous lakes most common? |
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Definition
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Term
| What is the apperance of cherry angiomas? venous lakes? |
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Definition
| cherry angiomas are multiple small red papules; venous lakes are soft blue papules |
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Term
| What is a nevus vasculosis? |
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Definition
| dilated arteriole connecting with a network of dilated superficial capillaries |
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Term
| "cluster of grapes" or "frog spawn" is a common name for what condition? |
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Definition
| lymphangioma; localized dilated lymph vessels |
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Term
| Name some benign skin lesions made up of dermal connective tissue? |
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Definition
| acrochordon, dermatofibroma, keloid |
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Term
| What is another name for acrochordon? |
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Definition
| fibroepithelial polyp (or skin tag) |
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Term
| Describe fibroepithelial polyps? |
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Definition
| small fleshy pedunculated papules in clusters in intertriginous areas |
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Term
| What is the "dimpling sign"? |
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Definition
| dimpling upon squeezing of a dermatofibroma |
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Term
| What causes dermatofibromas? |
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Definition
| usually secondary to trauma |
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Term
| What ethnic groups are at highest risk for keloids? |
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Definition
| african and mediterranean ancestry |
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Term
| T/F Keloids can form spontaneously, i.e. without any previous trauma. |
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Definition
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Term
| What benign skin lesion exhibits the "button-hole" sign? |
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Definition
| neurofibroma of von recklinghausen's disease |
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Term
| What is another name for neurofibromatosis type I? |
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Definition
| von recklinghausen's disease |
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