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35 Cards in this Set

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Macule

A flat, non-palpable spot on the skin, up to 
1 cm in diameter, of different color than the 
normal skin.

A flat, non-palpable spot on the skin, up to
1 cm in diameter, of different color than the
normal skin.


Macule example

Freckle, labial macule

Freckle, labial macule

Patch

A flat, non-palpable spot on the skin, more 
than 1 cm in diameter, of different color 
than the normal skin - a large macule.

A flat, non-palpable spot on the skin, more
than 1 cm in diameter, of different color
than the normal skin - a large macule.


Patch example

Birthmarks

Birthmarks

Papule

Elevated solid area up to 1 cm in diameter.

Elevated solid area up to 1 cm in diameter.

Papule example

Mole -nevus (pic), acne

Mole -nevus (pic), acne

Nodule

Elevated solid area up to 1 cm in diameter - a large papule.

Elevated solid area larger than 1 cm in diameter - a large papule.

Plaque

Elevated flat-topped area more than 1 cm in 
diameter.

Elevated flat-topped area more than 1 cm in
diameter.


Plaque example

Psoriasis

Psoriasis

Blister

General term for a vesicle or bulla.

General term for a vesicle or bulla.

Vesicle

A fluid filled raised area less than 1 cm.

A fluid filled raised area less than 1 cm.

Vesicle example

Chickenpox - vericella and shingles - zoster (pic)

Chickenpox - vericella and shingles - zoster (pic)

Bulla

A fluid filled raised area more than 1 cm - a large vesicle.

A fluid filled raised area more than 1 cm - a large vesicle.

Bulla example

Bullous pemphigoid

Bullous pemphigoid

Pustule

A discrete, puss filled raised area.

A discrete, puss filled raised area.

Pustule example

Pustular psoriasis

Pustular psoriasis

Scale

Dry, plate-like flaking off of stratum corneum due to abnormal cornification.

Dry, plate-like flaking off of stratum corneum due to abnormal cornification.

Scale example

Eczema, psoriasis, and squamous cell carcinoma (pic)

Eczema, psoriasis, and squamous cell carcinoma (pic)

Crust

Dried serum, blood or exudate overlying areas of lost or damaged epidermis.

Dried serum, blood or exudate overlying areas of lost or damaged epidermis.

Crust example

Impentigo

Impentigo

Lichenification

Thickened, rough skin with prominent markings, usually from rubbing.

Thickened, rough skin with prominent markings, usually from rubbing.

Lichenification example

Atopic dermatitis

Atopic dermatitis

Excoriation

Superficial loss of skin due to trauma.

Traumatic lesion breaking the epidermis causing a red linear mark i.e a deep scratch, often self inflicted.

Erosion

Depressed lesion due to loss of all or part of the epidermis.

Depressed lesion due to loss of all or part of the epidermis.

Ulcer

Loss of the epidermis, and all or part of the dermis and/or the subcutaneous tissue - a deep erosion.

Loss of the epidermis, and all or part of the dermis and/or the subcutaneous tissue - a deep erosion.

Wheal

Elevated, compressible and often transient lesion caused by edema in the dermis.

Elevated, compressible and often transient lesion caused by edema in the dermis.

Wheal example

Hives (urticaria)

Hives (urticaria)

Hyperkeratosis

Increase in thickness of the cornified (keratinized) layer of the epidermis, or the startum corneum. Ex; psoriasis, calluses

Increase in thickness of the cornified (keratinized) layer of the epidermis, or the startum corneum. Ex; psoriasis, calluses

Parakeratosis

Abnormal keratinization characterized by retention of nuclei in the stratum corneum. Ex; psoriasis

Abnormal keratinization characterized by retention of nuclei in the stratum corneum. Ex; psoriasis

Dyskeratosis

Premature keratinization of individual cells or groups of cells in the epidermis.

Premature keratinization of individual cells or groups of cells in the epidermis.

Papillomatosis

Thickening of the epidermis and dermis resulting in the formation of finger like processes (papillae), as seen in warts.

Thickening of the epidermis and dermis resulting in the formation of finger like processes (papillae), as seen in warts.

Acanthosis

Epidermal hyperplasia resulting in a thickened epidermis, specifically in the stratum spinosum. Ex; acanthosis nigricans

Epidermal hyperplasia resulting in a thickened epidermis, specifically in the stratum spinosum. Ex; acanthosis nigricans

Acantholysis

Loss of intercellular connections, resulting in a loss of cohesion between keratinocytes in the epidermis. Ex; pemphigus vulgaris

Loss of intercellular connections, resulting in a loss of cohesion between keratinocytes in the epidermis. Ex; pemphigus vulgaris

Spongiosis

Intercellular edema of the epidermis. Ex; eczematous dermatitis

Intercellular edema of the epidermis. Ex; eczematous dermatitis

Lentiginous

A linear pattern of melanocytic proliferation in the basal later of the epidermis.

A linear pattern of melanocytic proliferation in the basal later of the epidermis.