Eosinophilic cellulitis, also known as Wells' syndrome (not to be confused with
Weil's disease), is a
skin disease
A skin condition, also known as cutaneous condition, is any medical condition that affects the integumentary system—the organ system that encloses the body and includes skin, Nail (anatomy), nails, and related muscle and glands. The major funct ...
that presents with painful, red, raised, and warm patches of skin.
[ The rash comes on suddenly, lasts for a few weeks, and often repeatedly comes back.][ ]Scar
A scar (or scar tissue) is an area of fibrosis, fibrous tissue that replaces normal skin after an injury. Scars result from the biological process of wound repair in the skin, as well as in other Organ (anatomy), organs, and biological tissue, t ...
formation does not typically occur.[
Eosinophilic cellulitis is of unknown cause.][ It is suspected to be an ]autoimmune disorder
An autoimmune disease is a condition that results from an anomalous response of the adaptive immune system, wherein it mistakenly targets and attacks healthy, functioning parts of the body as if they were foreign organisms. It is estimated tha ...
.[ It may be triggered by bites from insects and arachnids such as spiders, fleas, or ]ticks
Ticks are parasitic arachnids of the order Ixodida. They are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, and species, but can become larger when engorged. Ticks a ...
, or from medications or surgery.[ Diagnosis is made after other potential cases are ruled out.] Skin biopsy
Skin biopsy is a biopsy technique in which a skin lesion is removed to be sent to a pathologist to render a microscopic diagnosis. It is usually done under local anesthetic in a physician's office, and results are often available in 4 to 10 day ...
of the affected areas may show an increased number of eosinophils
Eosinophils, sometimes called eosinophiles or, less commonly, acidophils, are a variety of white blood cells and one of the immune system components responsible for combating multicellular parasites and certain infections in vertebrates. Along wi ...
.[ Other conditions that may appear similar include ]cellulitis
Cellulitis is usually a bacterial infection involving the inner layers of the skin. It specifically affects the dermis and subcutaneous fat. Signs and symptoms include an area of redness which increases in size over a few days. The borders of ...
, contact dermatitis
Contact dermatitis is a type of acute or chronic inflammation of the skin caused by exposure to chemical or physical agents. Symptoms of contact dermatitis can include itchy or dry skin, a red rash, bumps, blisters, or swelling. These rashes ...
, and severe allergic reactions such as anaphylaxis
Anaphylaxis (Greek: 'up' + 'guarding') is a serious, potentially fatal allergic reaction and medical emergency that is rapid in onset and requires immediate medical attention regardless of the use of emergency medication on site. It typicall ...
.
Treatment is often with a corticosteroid
Corticosteroids are a class of steroid hormones that are produced in the adrenal cortex of vertebrates, as well as the synthetic analogues of these hormones. Two main classes of corticosteroids, glucocorticoids and mineralocorticoids, are invo ...
s.[ Steroids applied as a cream is generally recommended over the use of steroids by mouth.][ ]Antihistamines
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides r ...
may be used to help with itchiness.[ Many times the condition goes away after a few weeks without treatment.][ The condition is uncommon.][ It affects both sexes with the same frequency.][ It was first described by George Crichton Wells in 1971.]
Cause
Eosinophilic cellulitis is of unknown cause.[ It is suspected to be an ]autoimmune disorder
An autoimmune disease is a condition that results from an anomalous response of the adaptive immune system, wherein it mistakenly targets and attacks healthy, functioning parts of the body as if they were foreign organisms. It is estimated tha ...
.[ It may be triggered by bites from insects such as mosquitos,] spiders, fleas, or ticks
Ticks are parasitic arachnids of the order Ixodida. They are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, and species, but can become larger when engorged. Ticks a ...
, or from medications or surgery.[
]
Diagnosis
Diagnosis requires ruling out other potential causes.[ This includes ruling out ]vasculitis
Vasculitis is a group of disorders that destroy blood vessels by inflammation. Both artery, arteries and veins are affected. Lymphangitis (inflammation of lymphatic vessels) is sometimes considered a type of vasculitis. Vasculitis is primarily c ...
on skin biopsy
Skin biopsy is a biopsy technique in which a skin lesion is removed to be sent to a pathologist to render a microscopic diagnosis. It is usually done under local anesthetic in a physician's office, and results are often available in 4 to 10 day ...
.[
]
Treatment
Treatment is often with a steroid
A steroid is an organic compound with four fused compound, fused rings (designated A, B, C, and D) arranged in a specific molecular configuration.
Steroids have two principal biological functions: as important components of cell membranes t ...
s.[ This can be either applied as a cream or taken by mouth.][ As the condition tends to get better on its own taking steroids by mouth should generally only be tried if the rash covers a large area and it does not get better with other measures.]
References
External links
DermNet NZ
{{Webarchive, url=https://web.archive.org/web/20150822100709/http://dermnetnz.org/reactions/wells.html , date=2015-08-22 entry
Eosinophilic cutaneous conditions
Syndromes affecting the skin
Syndromes of unknown causes