Keratoacanthoma - a benign tumor that often recurs after cryoablation and is located on the face, the exposed parts of the body, arms and legs, mainly in the elderly. Rarely a tumor is found in heaven, cheeks, lips, nose, or under the nails.
In 6% of cases if untreated keratoacanthomas flows into squamous cell carcinoma. Keratoacanthoma skin looks exophytic dome assembly from red to gray-blue hue. The central part of the tumor is filled with horny masses, and the edges it rises above the level of the skin. Keratoacanthoma increases rapidly, reaching larger sizes for a few days or weeks.
Keratoacanthomas divided into the following types:
- Giant (reaching a size 10-20 mm);
- Solitary (single);
- Keratoacanthomas with peripheral growth;
- Hyponychial that grow from the nail bed to the nail plate rapidly and gradually become similar to nodes, crusted;
- Multiple combined with immunosuppression and toggo syndrome;
- Mushroom-shaped, having a form of flat or convex tumor with a smooth surface, which is covered ortokeratoznymi masses;
- Multinodulyarnye which is characterized by multiple tumors or merging placed in isolation with the formation of large craters ulcers of irregular shape;
- Tuber-serpiginous, having a form of hemispherical chamber of irregular shape, thinning skin and a little horny mass with central ulceration.
Reasons keratoacanthomas are:
- Tobacco smoking;
- Ultraviolet radiation;
- Impact tar, carcinogens and mineral oils;
- Mutations of the p53 gene;
- Mechanical injury;
- Genetic predisposition;
- Viral infection (papilloma virus, etc.).
Development keratoacanthomas skin
In its development, the tumor passes through several stages:
- In the first stage keratoacanthomas it is under active growth, which begins with the appearance of a small and gradually growing tubercle;
- The second stage in the growth of the tumor stops and stabilizes;
- In the third stage the phase of sudden regression when the swelling disappears, and in its place formed a scar.
The third stage usually occurs after 6-9 months after the onset of, and sometimes without surgery never arrives. That is, either the tumor disappears, leaving a scar, or turn into squamous cell carcinoma.
Diagnosis of skin keratoacanthomas
Diagnosing a tumor occurs on the basis of clinical manifestations by excisional biopsy and biopsy area roller. On the basis of the research is determined by the stage keratoacanthomas and its further treatment.
In many cases, skin keratoacanthomas runs independently, requiring no medical intervention, but the consequences in the form of scars do not disappear on their own. This fact and the ability to develop into a malignant tumor, and are the main causes of surgical treatment of tumors.
Surgical treatment keratoacanthomas skin can occur via:
- Laser therapy, which removes the growths in any areas of the skin;
- Cryosurgery, which is effective in the early stages of tumors and which are used for liquid nitrogen;
- Electrosurgery, which by an electric current;
- Clipping tumor surgical scalpel.