Article in English: This type of cancer is very rare. It occurs in only 1% to 4% of all types of breast cancer, and often presents with itchy breasts.  Inflammatory breast cancer involves a tumor in the breast and is often accompanied by changes in the skin and breast tissue surrounding the tumor. The changes in the breast tissue appear suddenly. The skin changes that occur include itching accompanied by pain, swelling, and redness of a specific area of the breast, located just above and surrounding the location of the tumor. The breast tissue becomes dimpled, resembling the skin of an orange.  Watch for other warning signs of inflammatory breast cancer including feeling a firm or hardened area under the skin, a feeling of warmth or heat to the touch, and a discharge from the nipple. The nipple may also be inverted, or pulled inward. Paget's disease is very rare, developing in 1% to 4% of all breast cancers. Paget's disease is a condition that looks very similar to psoriasis or eczema of the nipple and may be itchy.  The disease begins in the nipple or areola part of the breast, and often appears as a red, scaly, and sometimes itchy, rash. The nipple may also look flat or produce discharge.  Most people with Paget's disease of the breast have at least one tumor in the breast, and about half of them have a lump that can be physically felt during a breast exam. In 90% of women that have the tumor beneath the nipple area, the cancer has spread and is considered to be invasive. Paget's disease is diagnosed by tissue biopsy. It is sometimes diagnosed late since the symptoms present like common skin conditions. Keep in mind that both Paget's disease and inflammatory breast cancer are very rare, developing in less than 4% of all breast cancers.  Seek medical attention as soon as possible if you have symptoms that may indicate the presence of either disease. Most breast conditions that cause itching do not involve serious medical conditions.

Summary in Chinese:
注意炎性乳腺癌的症状。 排除佩吉特氏病。 记住这些疾病是非常罕见地。