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Porphyrias are diseases that occur when the body has problems making heme. Acute porphyrias affect the nervous system; cutaneous porphyrias affect the skin.

Find out what biotin is and what it does in your body, what foods provide it, and about biotin supplements.

Find out what biotin is and what it does in your body, what foods provide it, and about biotin supplements.

A fact sheet about moles and how some moles may be related to melanoma, the most serious type of skin cancer. Includes photos of differences between moles and cancer.

A fact sheet that summarizes the results of studies on vitamin D and cancer prevention. It includes information about dietary recommendations for vitamin D.

Having a skin exam to screen for skin cancer has not been shown to decrease your chance of dying from skin cancer. Learn about this and other tests that have been studied to detect or screen for skin cancer in this expert reviewed summary.

Basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) are the most common types of skin cancer. Find out about risk factors, symptoms, tests to diagnose, prognosis, staging, and treatment for skin cancer.

Skin cancer treatment options for nonmelanoma skin cancers include surgery, radiation therapy, chemotherapy, targeted therapy, and immunotherapy. Treatment choice depends on the cell type and extent of disease. Get detailed treatment information in this summary for clinicians.

Skin cancer prevention approaches include avoiding risk factors like ultraviolet radiation that comes from the sun, sun lamps, and tanning beds. Learn more about the risks and possible protective factors for skin cancer in this expert-reviewed summary.

Skin cancer prevention strategies include avoiding risk factors such as ultraviolet radiation, and increasing protective factors. Get detailed information about factors that influence the risk of skin cancer and interventions aimed at preventing it in this summary for clinicians.