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Basal-cell carcinoma (BCC), also known as basal-cell cancer, basalioma [7] or rodent ulcer, [8] is the most common type of skin cancer. [2] It often appears as a painless raised area of skin, which may be shiny with small blood vessels running over it. [1] It may also present as a raised area with ulceration. [1]
Among the others, insect bites (fleas), fungi infections and viruses (Feline leukemia virus, feline immunodeficiency virus) may be responsible. [8] Three primary clinical lesions of EGC include indolent (also referred to as eosinophilic or rodent) ulcer, eosinophilic plaque and eosinophilic granuloma. [9]
An ulcer is a sore on the skin or a mucous membrane, accompanied by the disintegration of tissue. Ulcers can result in complete loss of the epidermis and often portions of the dermis and even subcutaneous fat. Ulcers are most common on the skin of the lower extremities and in the gastrointestinal tract. An ulcer that appears on the skin is ...
SCC of the skin begins as a small nodule and as it enlarges the center becomes necrotic and sloughs and the nodule turns into an ulcer, and generally are developed from an actinic keratosis. Once keratinocytes begin to grow uncontrollably, they have the potential to become cancerous and produce cutaneous squamous-cell carcinoma.
Ticks and lice form another large group of invertebrate vectors. The bacterium Borrelia burgdorferi, which causes Lyme Disease, is transmitted by ticks and members of the bacterial genus Rickettsia are transmitted by lice. For example, the human body louse transmits the bacterium Rickettsia prowazekii which causes epidemic typhus.
Bleeding from the nose, also called epistaxis, may occur when the dried discharge (crusts) are removed. Septal perforation and dermatitis of nasal vestibule can occur. The nose may show a saddle-nose deformity. Atrophic rhinitis is also associated with similar atrophic changes in the pharynx or larynx, producing symptoms pertaining to these ...
Unknown cause: Vasomotor rhinitis and nonallergic rhinitis with eosinophilia: Occupational: Caused by work: Inflammatory disease of the nose causing intermittent and persistent symptoms arising out of causes and conditions attributable to a particular work environment; can be elicited by single or multiple exposures. Corrosive rhinitis is the ...
It occurs in the late stages of yaws, usually 5 to 10 years after the first symptoms of infection. This is now rare. [2] Very rarely, [2] yaws may cause bone spurs in the upper jaw near the nose (gondou); gondou was rare even when yaws was a common disease. [12]