Saturday, December 26, 2015

Unilateral, Linear, Painful Vesicles: ShinglesDermatology, the study of the skin in health and disease, has a unique language of its own. Dermatologists use certain descriptive terms while explaining skin rashes. Learning about these terms could be beneficial when you are afflicted with a skin disease. You will save a lot of time during consultation when you accurately describe the initial appearance of a rash and how it has evolved over the time. It will also help you when you have to describe your skin condition over the phone and while browsing the web.How to Describe a Skin Rash

To accurately describe a skin rash/lesion you need to know the primary, secondary and special skin lesions and then follow this template:

size, number and shape of the skin rashcolor of the rash. hypopigmented (reduced color), depigmented (complete loss of skin color), hyperpigmented (dark color), erythematous (red), pink, skin colored etc.type of the skin lesion: primary, secondary or special typearrangement: Is it annular, linear, grouped, sparse, dense or scattered?distribution: Is it facial, truncal, generalized, asymmetrical or bilaterally symmetrical?Is the skin rash itchy, non-itchy, painful or asymptomatic?The description of a skin rash should preferably contain all the above characteristics. These need not be in the same order, though.What is a Primary Skin Lesion?

Primary skin lesions are the initial lesions which are unaltered by scratching, rubbing and application of creams or those which have not undergone natural regression over a period. Examples of primary skin lesions are: macule, patch, papule, plaque, vesicle, bulla, pustule, nodule, cyst, comedo and wheal.

What is a Secondary Skin Lesion?

Scratching, scrubbing or superadded infection to a primary lesion or normal Meet Positives skin results in secondary skin lesions. Following are the main secondary skin lesions: crust, erosion, ulcer, fissure, excoriation, scar and scale.

What are Special Skin Lesions?

These are special primary lesions seen in a few diseases. A few examples are:

telangiectasia: dilated, superficial blood vessels; seen on chronically sun exposed areas, misuse of topical corticosteroids and also in certain autoimmune disorders like the dermatomyositis, lupus erythematosus, and systemic sclerosisburrows: tunnels in the epidermis created by the scabies mitepetechia: small, punctate bleeding into the dermis, less than 5 mm in diameterpurpura: petechia larger than 5 mm are called purpura. Petechia and purpura are commonly seen in drug reactions and blood disorders where the clotting mechanism is lesions: typical rashes seen in erythema multiforme; the target lesions have three zones: a central dark pigmented area or vesicle, a mid pale area and an outer erythematous zoneLearning the above skin terminology makes the description and understanding of a skin rash easy and facilitates faster diagnosis of skin diseases.

A generalized, itchy or non-itchy, bilaterally symmetrical, well-demarcated, multiple, red plaques with micaceous and silvery white scales would immediately point towards a diagnosis of psoriasis. Lichen planus lesions are described as multiple, purple, polygonal, flat, itchy papules which are distributed mainly on the flexural surfaces. Grouped, painful, vesicles and bullae on an erythematous (pink/red) base appearing in a linear fashion along a dermatomal (skin area supplied by a specific nerve) distribution on one side of the body will denote the appearance of herpes zoster or shingles.

How to Describe a Skin Rash: Related Article What are the Primary and Secondary Skin Rashes?Source:Fitzpatrick JE & Aeling JL. Dermatology Secrets. Mosby Publishers, 1996.

Publicado por gordonhansen06 @ 8:01 AM
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