Sandbox/00026

• Cellulitis

• Cellulitis is an acute, subacute, or chronic infection of the dermis and subcutaneous tissue.

• Erysipelas

• Erysipelas is a bacterial infection of the dermis and upper subcutaneous tissue hallmarked by a well-defined, raised edge reflecting the more superficial (dermal) involvement.

• Impetigo

• Impetigo is a contagious superficial pyogenic infection of the skin, that usually begins as vesicles with a very thin, fragile roof consisting only of stratum corneum.

• Non-bullous impetigo (or impetigo contagiosa of Tilbury Fox):
• Bullous impetigo

• Ecthyma

• Ecthyma is a pyogenic infection of the skin characterized by the formation of adherent crusts, beneath which ulceration occurs.

• Furuncle (boil)

• Furuncle is an acute, usually necrotic, infection of a hair follicle with Staphylococcus aureus.

• Sycosis

• Sycosis is a subacute or chronic pyogenic infection involving the whole depth of the follicle.

• Lupoid sycosis (ulerythema sycosiforme): sycosis in which the follicles are destroyed with clinically evident scarring.
• Folliculitis decalvans: sycosis involving the scalp.

• Erythrasma

• Erythrasma is a mild, chronic, localized superficial infection of the skin caused by a group of closely related aerobic coryneform bacteria, usually known as Corynebacterium minutissimum.

• Dermatitis vegetans (pyoderma vegetans)

• Dermatitis vegetans is a condition of uncertain etiology characterized by the development of epithelial hyperplasia and chronic granulomatous changes.

• Perifolliculitis capitis (abscedens et suffodiens; dissecting cellulitis of the scalp)

• Perifolliculitis capitis is a rare, chronic, suppurative disease of the scalp.

• Suppurative hidradenitis (apocrinitis; hidradenitis suppurativa)

• Suppurative hidradenitis is a chronic relapsing inflammatory disease originating in apocrine gland follicles, which may become chronic and often indolent due to subcutaneous extension with induration, scarring, destruction of skin appendages and sinus formation.

• Erysipeloid

• Erysipeloid is an acute, rarely chronic, infection with Erysipelothrix rusiopathiae.