Christina P. Linton, PhD, FNP-BC, department of Dermatology, main Utah Clinic Provo, UT.

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Correspondence concerning this write-up should be handle to Christina P. Linton, PhD, FNP-BC, department of Dermatology, central Utah Clinic, 1055 north 500 West, Suite 111, Provo, UT 84604. E-mail:


MORPHOLOGY TERMINOLOGY

MORPHOLOGY - The form or framework of an individual skin lesion.

LESION - Any solitary area of altered skin. Lesions might be solitary or multiple.

PRIMARY LESION - A lesion directly linked with the disease process that is described with developed dermatological terminology.

Example: Macule, papule, patch, plaque, vesicle, bulla, and others

SECONDARY LESION - alteration of a major lesion that results from development of the main lesion, traumatic injury, or other external factors.

Example: Erosion, fissure, ulceration, excoriation, and also others

FLAT LESIONS

MACULE - A circumscribed, flat area of discoloration that is less than 10 mm* in diameter.

Example: Freckle

PATCH - A circumscribed, flat area that discoloration the is better than 10 mm* in diameter. Slight scale might or might not it is in present.

Example: Vitiligo

RAISED LESIONS

PAPULE - A circumscribed, elevated, hard lesion the is much less than 10 mm* in diameter.

Example: Wart

PLAQUE - A circumscribed, elevated, heavy lesion that is better than 10 mm* in diameter and is usually wider than it is thick.

Example: Psoriasis

NODULE - A palpable, heavy lesion that is better than 10 mm* in diameter. Nodules space usually uncovered in the dermal or subcutaneous tissue, and the lesion might be above, level with, or listed below the skin surface.

Example: Dermatofibroma

TUMOR - A solid, certain lesion that is generally greater than 20 mm in diameter. Tumors can be above, level with, or beneath the skin surface. Likewise known together a mass.

Example: Metastatic carcinoma

WEAL - Transient, circumscribed, edematous papules or plaques resulted in by swelling in the dermis. Wheals might manifest through erythematous borders and pale centers and/or a small peripheral zone that pallor or vasoconstriction.

Example: Urticaria

DEPRESSED LESIONS

BURROW - A thread-like straight or serpiginous (wavy, serpent-like) tunnel in the epidermis generally made by a parasite.

Example: Scabies

EROSION - A shallow, moist, or crusted lesion resulting from the lose of the superficial great of the top epidermis only, together from friction or pressure.

Example: Ruptured varicella vesicles

EXCORIATION - A skin abrasion that is typically superficial and also due come scratching the the skin. Excoriations might be direct or focal.

Example: Neurotic excoriations native habitual picking

FISSURE - Sharply defined linear or wedge-shaped tears in the epidermis through abrupt walls.

Example: Interdigital tinea pedis

PITS - Small, high solution demarcated depressions in the skin or pond surface.

Example: Pitted keratolysis

ULCER - A circumscribed ns of the epidermis and also at the very least upper dermis. Ulcers are further classified by your depth, border, shape, edge, and also the organization at that base.

Example: Venous stasis ulcer

FLUID-FILLED LESIONS

ABSCESS - A localized accumulation of pus in the dermis or subcutaneous organization that is frequently red, warm, and tender.

Example: Methicillin-resistant Staphylococcus aureus (MRSA) infection

BULLA (PLURAL = BULLAE) - A large, raised, circumscribed blister the is greater than 10 mm* in diameter and also is liquid filled. The fluid can be clear, serous, hemorrhagic, or purulent.

Example: Pemphigus vulgaris

CARBUNCLE - An inflammation nodule composed of 2 or an ext confluent furuncles with separate heads.

Example:Staphylococcus aureus infection

CYST - A closed cavity or sac containing liquid or semisolid material. A cyst may have actually an epithelial or endothelial lining.

Example: Epidermal consist of cyst

FURUNCLE - an acute, round, firm, circumscribed, follicle-centered nodule brought about by epidemic that is usually higher than 10 mm in diameter. Defined by pain, redness, and also potentially clearly shows pus.

Example:Staphylococcus aureus infection

PUSTULE - A purulent (pus filled) vesicle. Pustules room filled v neutrophils and may it is in white or yellow. Not all pustules are infected.

Example: bacterial folliculitis

VESICLE - A small, superficial, circumscribed blister that is much less than 10 mm* in diameter and also is liquid filled. The liquid may be clear, serous, hemorrhagic, or purulent.

Example: Herpes zoster

VASCULAR LESIONS

ECCHYMOSIS (PLURAL = ECCHYMOSES) - Nonblanching, purpuric macules or patches higher than 3 mm in diameter because of extravasated blood in the skin. Color transforms over time may go native blue-black to brown-yellow, or green prior to fading away.

Example: Bruise from dull trauma

HEMATOMA - A arsenal of extravasated blood the is relatively or fully confined within a space. The blood is commonly clotted (or partially clotted) and, relying on time, might manifest various levels of organization and color.

Example: Postsurgical bleeding

PURPURA - Bleeding into the skin that outcomes in violaceous (violet or purple) discoloration the varies follow to its duration and does not blanch with pressure. Purpura includes petechiae and also ecchymoses. When purpuric lesions are palpable, they represent vasculitis (vascular inflammation).

Example: Henoch-Schönlein purpura

PETECHIAE - Tiny, 1- come 2-mm (pinpoint come pinhead size) nonblanchable purpuric macules result from the rupture of little blood vessels. Shade may it is in red, purple, or brown.

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Example: Rocky mountain spotted fever

TELANGIECTASIA - Small, superficial cutaneous blood ship that end up being persistently visible because they room dilated.