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The study of the cause of a disease, disorder or condition.
Etiology
Formations resulting from a lesion, which extend into the dermal layer or deeper, as part of the normal healing process
Scars
Like a papule, but larger with dermal penetration.
Nodule
Cracks in the skin; often occur when skin loses its flexibility due to exposure to wind, cold, water, etc.
Fissures
Soft, Pedunculated skin growth
Skin Tags
Flat discoloration appearing on the skin’s surface; light brown or red in color
Macule
Abnormal membranous sac containing a gaseous, liquid or semi-solid substance.
Cyst
Dried masses that are the remains of an oozing sore
Crust
Hardened red elevations of the skin in which no fluid is present
Papule
Fluid-filled elevations in the skin caused by localized accumulation of fluids or blood just below the epidermis.
Vesicle
Small elevations of skin similar to vesicles in size and shape but containing pus
Pustule
A skin classification that identifies common skin conditions that involve an overgrowth or excess of skin (new growth).
Hypertrophy
Round, dry patches of skin, covered with rough, silvery scales surrounded by red inflammation; condition is chronic and not contagious
Psoriasis
Larger vesicle that contains a clear, watery fluid
Bulla
Mechanical abrasions or injuries to the epidermis, e.g., scratches to the surface of the skin.
Excoriation
Shedding dead cells of the uppermost layer of the epidermis.
Scales
Well-defined, elevated cluster of flat, scaly skin.
Plaque
Solid masses in the skin; may be soft or hard; may be fixed or freely movable
Tumor
Small dark bumps that usually appear on the face and neck; harmless condition that tends to affect people with darker skin
Dermatosis Papulosa Nigra (DPN)
Open lesions visible on the skin surface that may result in the loss of portions of the dermal layer and be accompanied by pus.
Ulcer