More
    Categories

    Ear Margin Dermatosis

    Related Articles

    What Is Ear Margin Dermatosis?

    Ear margin dermatosis is a common seborrheic disorder that affects the edges of the ears of several breeds, especially the dachshunds. The disorder usually begins in young adults and is characterized by replacement of normal epithelial cells by horny tissue. In severe untreated cases, a progression to ulceration and necrosis may be seen due to thrombosis of the capillaries supplying blood to the ear margins, which may result in severe scarring. Itchiness is usually absent, but alopecia may develop with time.

    Diagnosis

    The diagnosis of ear margin dermatosis is based on the history, breed, and presence of the characteristic ear margin skin damage. Skin scrapings are performed to rule out scabies and demodicosis if severe itchiness is present. Diagnostic procedures to differentiate these diseases may require blood tests, blood chemistry profile, antinuclear antibody (ANA) testing, Coomb’s test, and biopsies. Coomb’s test is a test to detect non-agglutinating antibodies against red blood cells by use of anti-antibodies (the Coombs’ reagent.) The direct test is applied to freshly drawn blood to detect antibody bound to circulating red cells. The indirect test is applied to serum to detect the presence of antibodies that can bind to red blood cells.

    Treatment

    Advanced lesions lead to head shaking and the development of fissures while the mild scaling form of ear margin dermatosis is usually controllable with topical therapy but rarely is curable. In the early marginal lesions, topical treatment with antiseborrheic agents (benzoyl peroxide, tar, sulfur, salicylic acid) will remove the greasy scales. In severe cases, topical glucocorticoid creams and systemic prednisone may be prescribed to reduce inflammation. Although the advanced ulcerative and necrotic stage is resistant to medical therapy, it can be cured by surgical removal of the affected ear margin and laser surgery.

    Video Credits: MercolaHealthyPets

    References:

    1. Karen Moriello – Small Animal Dermatology: Self-Assessment Color Review
    2. K. V.F. Jubb – Pathology of Domestic Animals

    Categories

    Other Topics

    Newfoundland

    History & Overview The Newfoundland belongs to the Molossian type of dog breeds and is named after the...

    Bird Records

    Extreme Facts About Birds Largest recorded nesting bird colony: 136 million passenger pigeons nesting in an area in Wisconsin...

    Carolina Wren

    Overview The loud ringing call of the Carolina Wren (Thryothorus ludovicianus) is one of the commonest sounds of...

    Bush monkey-flower

    The bush monkey-flower (Mimulus aurantiacus), also known as the Sticky monkey-flower, has pale orange flowers and a sprawling habit. Grow it in...

    Pests of Perennials

    Pests build up most quickly when just one or two kinds of plants grow, so a bed of mixed perennials is less...