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Integument System Overview - Q – Symptomatic terms & A – Meaning

lesion (Fig. 3-2) an area of pathologically altered tissue; the two types of lesions are primary and secondary
primary lesions lesions arising from previously normal skin
macule or macula (Fig. 3-3, A) a flat, discolored spot on the skin up to 1 cm across (e.g., a freckle)
patch (Fig. 3-3, B) a flat, discolored area on the skin larger than 1 cm (e.g., vitiligo)
papule (Fig. 3-3, C) a solid mass on the skin up to 0.5 cm in diameter (e.g., a nevus [mole])
plaque (Fig. 3-3, D) a solid mass greater than 1 cm in diameter and limited to the surface of the skin
nodule (Fig. 3-3, E) a solid mass greater than 1 cm that extends deeper into the epidermis
tumor (Fig. 3-3, F) a solid mass larger than 1–2 cm
wheal (Fig. 3-3, G) an area of localized skin edema (swelling) (e.g., a hive)
vesicle (Fig. 3-3, H) little bladder; an elevated, fluid-filled sac (blister) within or under the epidermis up to 0.5 cm in diameter (e.g., a fever blister)
bulla (Fig. 3-3, I) a blister larger than 0.5 cm (e.g., a second-degree burn) (bulla = bubble)
pustule (Fig. 3-3, J) a pus-filled sac (e.g., a pimple)
secondary lesions lesions that result in changes in primary lesions
erosion (Fig. 3-4, A) gnawed away; loss of superficial epidermis, leaving an area of moisture but no bleeding (e.g., area of moisture after rupture of a vesicle)
ulcer (Fig. 3-4, B) an open sore on the skin or mucous membrane that can bleed and scar; sometimes accompanied by infection (e.g., decubitus ulcer)
excoriation (Fig. 3-4, C) a scratch mark
fissure (Fig. 3-4, D) a linear crack in the skin
scale (Fig. 3-4, E) a thin flake of exfoliated epidermis (e.g., dandruff)
crust (Fig. 3-4, F) a dried residue of serum (body liquid), pus, or blood on the skin (e.g., as seen in impetigo)
vascular lesions lesions of a blood vessel
cherry angioma (Fig. 3-5, A) a small, round, bright red blood vessel tumor on the skin, often on the trunk of the elderly
telangiectasia (Fig. 3-5, B) a tiny, red blood vessel lesion formed by the dilation of a group of blood vessels radiating from a central arteriole, most commonly on the face, neck, or chest (telos = end)
spider angioma 0
purpuric lesions purpura; lesions resulting from hemorrhages into the skin
petechia (Fig. 3-5, C) spot; reddish-brown, minute hemorrhagic spots on the skin that indicate a bleeding tendency; a small purpura
ecchymosis (Fig. 3-5, D) bruise; a black and blue mark; a large purpura (chymo = juice)
cicatrix of the skin a mark left by the healing of a sore or wound, showing the replacement of destroyed tissue by fibrous tissue (cicatrix = scar)
keloid (Fig. 3-6) an abnormal overgrowth of scar tissue that is thick and irregular (kele = tumor)
epidermal tumors skin tumors arising from the epidermis
nevus (see Fig. 3-1) a congenital malformation on the skin that can be epidermal or vascular; also called a mole
dysplastic nevus a mole with precancerous changes
verruca (Fig. 3-7) an epidermal tumor caused by a papilloma virus, also called a wart
Created by: MT student1