What is the cause of skin cancer?

Skin cancer has a very low incidence in my country, but it is one of the most common malignant tumors in the white race. Today we will analyze the knowledge about skin cancer and understand what causes it.

According to the statistics of local malignant tumor incidence rate from Feihua Health Network, the incidence rate of skin malignant tumors other than malignant melanoma is 1.53/100,000. Boring et al. reported that there were 600,000 new cases of skin cancer other than malignant melanoma in the United States in 1991. According to Giles et al., the incidence rate of skin cancer in southern Australia is at least 650/100,000, which is 100 times the incidence rate in my country. It is estimated that among all white Americans who can live to 65 years old, 40% to 50% have suffered from skin cancer at least once, which may be related to the geographical location and people's lifestyle.

Symptoms 1. Squamous cell carcinoma is often transformed from keratosis, leukoplakia and other precancerous diseases. It grows quickly and forms ulcers in the early stage. Some are nodular or cauliflower-shaped, with less invasion into the deep part and a movable base; some are butterfly-shaped, with more obvious infiltration into the deep part, great destructiveness, and often involving bones. Squamous cell carcinoma is often accompanied by purulent infection, accompanied by malodor and pain. Regional lymph node metastasis is common. The author encountered a huge squamous cell carcinoma in the head, which had an extremely bad odor, more purulent secretions, and was prone to bleeding; when cervical lymph node metastasis occurred, the site of the disease was the junction of the mucosa and skin. Squamous cell carcinoma develops fastest, and patients with mucosal disease are more likely to metastasize.

2. Basal cell carcinoma is often asymptomatic at the onset. In the early stage, it is mostly plaque-like papules with hard bases, and some are wart-like protrusions, which then break down into ulcers. They are irregular, with raised edges, like craters, and uneven bottoms, and grow slowly. Metastasis is rare, and the ulcers are shallowly ulcerated with translucent nodules on the edges, which then gradually expand and can erode surrounding tissues and organs, becoming erosive ulcers.

3. Squamous cell carcinoma is more common in people aged 30 to 50, while basal cell carcinoma is more common in people over 50. The former develops quickly and often grows rapidly in a short period of time; the latter is slow. Squamous cell carcinoma is more common in the lower lip, tongue, nose, vulva, and at the junction of the skin and mucous membranes. The ulcer has a high edge, is red and hard, and is ring-shaped and cauliflower-like in appearance. The surrounding inflammatory reaction is significant, and there are often regional lymphadenopathy. Basal cell carcinoma is more common in the eye socket, inner canthus, nose, cheek, forehead, and back of the hand; the ulcer has a waxy, nodular, and rolled edge, and some are black. The inflammatory reaction is mild or absent, and metastasis is very rare. It mainly infiltrates into deep tissues.

The above is the knowledge about skin cancer that we have told you today. I hope it can be helpful to you. If you have any other needs, you can also consult our online consulting experts of Feihua Health Network. We are always here to answer your questions. Feihua Health Network is always by your side and cares about your health issues! Feihua Health Network wishes you good health!

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