What Is The Difference Between Primary And Secondary Skin Lesions?

How do you describe skin lesions?

Primary Morphology Macule – flat lesion less than 1 cm, without elevation or depression.

Patch – flat lesion greater than 1 cm, without elevation or depression.

Plaque – flat, elevated lesion, usually greater than 1 cm.

Papule – elevated, solid lesion less than 1 cm.

Nodule – elevated, solid lesion greater than 1 cm..

What are primary and secondary skin lesions?

Identifying Primary and Secondary Skin Lesions Primary skin lesions are present at the onset of a disease. In contrast, secondary skin lesions result from changes over time caused by disease progression, manipulation (scratching, picking, rubbing), or treatment.

Is an ulcer a primary or secondary lesion?

Skin lesions may be primary or secondary. Primary lesions (e.g., macules or papules) appear as a direct result of a disease process. Secondary lesions such as scales or ulcers may develop from primary lesions or result from external trauma (e.g., infections, scratching).

Is a Wheal a secondary lesion?

“Wheal” and “urticaria” are often use syn- onymously, although the former is the name of an eruption and the latter is a condition presenting these eruptions. A secondary lesion is an eruption that occurs secondarily after a primary or other skin lesion.

What do precancerous skin lesions look like?

This nonmelanoma skin cancer may appear as a firm red nodule, a scaly growth that bleeds or develops a crust, or a sore that doesn’t heal. It most often occurs on the nose, forehead, ears, lower lip, hands, and other sun-exposed areas of the body.

What do lesions on the skin look like?

Skin lesions are areas of skin that look different from the surrounding area. They are often bumps or patches, and many issues can cause them. The American Society for Dermatologic Surgery describe a skin lesion as an abnormal lump, bump, ulcer, sore, or colored area of the skin.

What are secondary skin lesions?

Secondary lesions are those lesions that are characteristically brought about by modification of the primary lesion either by the individual with the lesion or through the natural evolution of the lesion in the environment.

What are the 3 types of lesions?

Types of primary skin lesionsBlisters. Small blisters are also called vesicles. … Macule. Examples of macules are freckles and flat moles. … Nodule. This is a solid, raised skin lesion. … Papule. A papule is a raised lesion, and most papules develop with many other papules. … Pustule. … Rash. … Wheals.

What are the characteristics of secondary skin lesions?

* Scale-heaped-up keratinized cells; flakey exfoliation; irregular; thick or thin; dry or oily; variable size; can be white or tan.

What are primary lesions?

Primary lesions, which are associated with specific causes on previously unaltered skin, occur as initial reactions to the internal or external environment. Vesicles, bullae, and pustules are formed by fluid within skin layers. Nodules, tumors, papules, wheals, and plaques are palpable, elevated, solid masses.

What is a tertiary lesion?

Tertiary (ie, late) lesions are caused by obliterative small vessel endarteritis, which usually involves the vasa vasorum of the CNS. Factors that determine the development and progression of tertiary disease are not known.

What are examples of primary lesions?

Primary LesionsVesicle: a fluid-filled blister which is less than 5mm in diameter, elevated above the level of the skin with well demarcated borders.Bulla: a large vesicle (greater than 5 mm in diameter)Pustule: a pustule is similar in appearance to a vesicle or bulla, but contains purulent material.More items…•

What do benign skin lesions look like?

It typically presents as asymptomatic, slowly enlarging, well-demarcated, irregular, skin colored to pink or brown, patches or scaly plaques. Lesions often reach several centimeters in diameter and may occur on any mucocutaneous surface, favoring the head, neck, and extremities.

What is a crust lesion?

Crust. A dried exudate on the skin surface, either serum, blood or pus or a combination. Crusts are commonly seen in diseases with a pustular component (eg canine pyoderma, pemphigus foliaceus), and where the exudate from erosions and ulcers dries on the surface of the lesion.

Is erosion a primary lesion?

Primary lesions Epidermal collarette, scar, excoriation, erosion, ulcer, fissure, lichenification, hyperpigmentation, callus.