Category: Diseases

Leg ulcers occur relatively commonly in late middle and old age, arising in association with chronic venous insufficiency, chronic arterial insufficiency, or peripheral sensory neuropathy; in some patients, a combination

Langerhans cell histiocytosis (LCH) is an idiopathic group of disorders characterized histologically by proliferation and infiltration of tissue by Langerhans cell-type histiocytes that fuse into multinucleated giant cells and form

Keratoacanthoma (KA) is a special lesion, a pseudocancer, occurring as an isolated nodule usually on the face. It presents as a dome-shaped nodule with a central keratinous plug that mimics

Kawasaki’s disease (KD) is an acute febrile illness of infants and children, characterized by cutaneous and mucosal erythema and edema with subsequent desquamation, cervical lymphadenitis, and complicated by coronary artery

Kaposi’s sarcoma (KS) is a multisystem vascular neoplasia characterized by mucocutaneous violaceous lesions and edema as well as involvement of nearly any organ. Many individuals with KS are in some

Definition Scabies: Infestation of the epidermis by Sarcoptes scabiei, a microscopic insect like mite that burrows in the skin and reproduces. Pediculosis (lice): Infestation by Pediculus humanus capitis (head louse);

Infective endocarditis (IE) is a microbial infection, implanted on a heart valve or on the mural endocardium after bacteremia or fungemia. It is characterized by fever, valvular destruction, and peripheral

Infectious folliculitis is an infection of the upper portion of the hair follicle, characterized by a follicular papule, pustule, erosion, or crust at the follicular infundibulum; the involvement can extend

An infectious exanthem is a generalized cutaneous eruption associated with a primary systemic infection; it is often accompanied by oral mucosal lesions, i.e., an enanthem. Most often it is of

Impetigo is a common, highly infectious skin disease caused by staphylococcus bacteria or more rarely by the streptococcus bacteria. Impetigo, a contagious skin infection that usually produces blisters or sores