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CYANOSIS: Blueish color in toenails and finernails, can also appear in lips.

ERYTHEMA: Red hue, increased blood flow, "slapped cheeks" look
CAROTENEMIA: Yellowish palm, does not affect the sclera as does Jaundice. Caused by high intake of carrots and other yellow vegatables and fruits.
JAUNDICE: Yellow skin, easily seen in the sclera, also visible in mucous membranes. Caused by liver diseas or hemolysis of red blood cells.
CAFE-AU-LAIT SPOT: Uniformly pigmented macule with a irregular border. Ususally 0.5-1.5 cm in diameter. 6+ > 1.5 cm suggests neurofibromitosis. Flat, nonpalpable lesion with changes in skin color.
VITILIGO: Depigmented macules appear on face, hands, feet. Lack of melanin. Could be hereditary, changes distressing to patient. Flat, nonpalpable lesion with changes in skin color.
TINEA VERSICOLOR: Common superficial fungal infection of the skin. Slightly scaly macules on trunk, neck and upper arms.
ACANTHOSIS NIGRICANS: Sign of Type II diabetes (Insulin resistance). Prevelent in obesity.
PITYRIASIS ROSEA: Reddish oval ringworm-like lesions. Self limiting virus, itchy, erruption of skin.
ATOPIC ECZEMA: Appears most commonly on flexor surfaces. Dry skin, itches. Common on neck, inside elbow, back of knee.
PSORIASIS: Silver scaly lesions, mainly on the extensor surfaces. Circular. Palpable elevations.
HEMANGIOMA: Abnormal buildup of blood vessels in the skin or internal organs. Reddish purple in color. Flat, nonpalpable lesion with changes in skin color.
Papule
Primary Skin Lesion. Circumscribed, solid elevation of skin with no visible fluid, varying in size from a pinhead to 1 cm.
Example: PSORIASIS
Nodule
Primary Skin Lesion. Marble like lesion larger than 0.5 cm, often deeper and firmer than a papule.
Example: DERMATOFIBROMA
Cyst
Primary Skin Lesion. Nodule filled with expressible material, either liquid or semisolid.
Example: EPIDERAL INCLUSION CYST
Wheal
Primary Skin Lesion. Irregular, relatively transient, superficial area of localized skin edema.
Example: URTICARIA
Vesicle
Primary Skin Lesion. Up to 1.0 cm; filled with serous fluid
Example: HERPES SIMPLEX
Bulla
Primary Skin Lesion. 1.0 cm or larger, filled with serous fluid
Example: INSECT BITES

Pustule
Primary Skin Lesion. Filled with pus.
Example: ACNE, SMALL POX
Burrow
Primary Skin Lesion. Slighly raised tunnel in the epidermis, commonly found on the finger webs and on the sides of the fingers.
Example: SCABIES
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