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Skin cancer

Skin cancer is skin malignant tumor, according to the source of tumor cells and have different names, including epidermis, skin appendages, skin soft tissue, peripheral nerve, melanocyte, skin lymphoid network and hematopoietic tissue. There are also metastatic tumors that have spread to the skin from other tissues.
The cause of
The cause of the disease is not clear, its occurrence may be related to the following factors: (2) chemical carcinogens, such as asphalt, tar derivatives, benzopyrene and other long-term stimulation; (3) radiation, ionizing radiation; (4) chronic stimulation and inflammation, such as chronic ulcer, prolonged unhealed fistula, discoid lupus, radial dermatitis, etc.; (5) other: such as immunosuppressive stage, virus carcinogenic substances.

Skin malignant tumors include squamous cell carcinoma, basal cell carcinoma, malignant melanoma, malignant lymphoma, idiopathic hemorrhagic sarcoma, sweat adenocarcinoma, protuberant dermatofibrosarcoma, angiosarcoma, etc. Skin cancer includes primary and secondary cancers that spread from other sites to the skin. Primary skin cancers include basal cell carcinoma, squamous cell carcinoma in situ (bowen's disease), squamous cell carcinoma, eczematoid carcinoma, and malignant melanoma.

Clinical manifestations of
Cutaneous malignancies are characterized by a relatively high rate of bleeding, with basal cell carcinoma and squamous cell carcinoma being the most common.
Squamous cell carcinoma
It can be transformed from keratosis, leukoplakia and other precancerous diseases. It grows quickly and forms ulcers early on. Some are nodular, milky or cauliflower, less invasive to the deep, basement mobile, some are butterfly, to the deep infiltration is more obvious, destructive, often involving bones. Squamous cell carcinoma (SCC) is associated with infection with a thick purulent fluid that is fetid and painful. Squamous cell carcinoma is more malignant and metastatic, with regional lymph node metastasis.
Basal cell carcinoma
Early onset often asymptomatic, mostly basal hard plaques shape papula, some is verrucous uplift, and then burst as a focal change, irregular, edge uplift, the bottom is uneven, slow growth, more than a single, good hair at cheek, nose, and nose on both sides, the tumor often no malaise, although basal cell carcinoma is a malignant, but the transfer is few, edge translucent nodules uplift happen first shallow ulcer, then gradually expand, to invade surrounding tissues and organs, become invasive ulcer. Basal cell carcinoma can be divided into four types according to its morphology and pathological changes, namely, nodular ulcer type, pigment type, epulosis or fibrosis type and superficial type.
Malignant melanoma
It is the skin cancer with high grade of malignancy and quick metastasis. The pigment in Chinese skin is more, have better protective effect to ultraviolet ray. At the same time pay attention to sunscreen, so malignant melanoma is rare in China. Because melanoma is a black color is relatively easy to find, so if the nail, nail bed, foot, palm or other parts of the body found in the black spots, in the near future significantly expanded, and easy to break, or half of the nail black, should be timely to the hospital.
Eczematoid carcinoma
It usually occurs in the unilateral breast of a woman. The symptom is similar with eczema, show gules or the skin change with dark red, the surface is easy to have ooze fluid or ooze blood, when first hair more be in ministry of unilateral areola, later slow development, some tit can have excessive fluid. It is easily misdiagnosed as eczema. The unilateral sex breast eczema of middleaged female, long cure does not heal should go to a hospital in time examination.



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