Pathology concepts Flashcards
Bulla
Blister or large skin vesicle, bigger than 1 cm
Excoriation
Superficial skin defect caused by scratching
Fissure
Sharp-edged defect of epidermis that extends into deeper layers of the skin
Macule
Flat lesion, less than 2 cm (freckle)
Papule
Slightly elevated, small induration of the skin, less than 1 cm, eczema
Nodule
Similar to papule but larger (1-5 cm), moles or
Petechia
Pinpoint intradermal or subcutaneous skin hemorrhage
Patch
Similar to macule but larger than 2 cm
Pustule
Vesicle filled with pus
Scale
Keratin layers that cover the skin in flakes or sheets and can be easily scraped away
Scar
Formation of fibrous tissue following healing of inflammation or injury
Tumor
Nodule exceeding 5cm
Ulcer
Defect of epidermis
Vesicle
Fluid-filled elevation of the epidermis measuring less than 1 cm
Crust
Skin defect that is covered with coagulated plasma or blood (scab)
Urticaria
Pruritic skin eruption characterized by transient lesions (wheals) of varying shapes and sizes with well defined erythematous margins and pale centres (hives)
Cyst
Closed sac in or under the skin lined with epithelium and containing fluid or semisolid material
Plaque
Flat often raised patch on the skin or any other organ of the body
Nail clubbing
“upside down spoons”
Lice
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