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9 types of breast cancer

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Breast cancer has subtypes defined based on the aggressiveness and cause of the tumor.

Breast cancer develops in different ways, which gives rise to several subtypes of the disease. These variations are divided into in situ or invasive. If in situmeans that the picture is still in the beginning, with the tumor concentrated only in the breast, without spreading to other organs.

Now, if it is invasive, it is a sign that it is a metastatic breast cancer, with metastases that spread to bones, lungs, liver or brain. “There are several types, the most important thing is to detect them at the beginning”, warns Carlos Machado, who specializes in preventive medicine.



The following are the main types of breast cancer:

  1. Ductal carcinoma in situ

  2. lobular carcinoma in situ

  3. Invasive ductal carcinoma

  4. Invasive lobular carcinoma

  5. inflammatory breast cancer

  6. Triple negative breast cancer

  7. Paget’s disease

  8. Angiosarcoma

  9. Phylloid Tumor

1. Ductal carcinoma in situ

This is the most common type of non-invasive breast cancer. The ductal carcinoma in situ affects the breast ducts – the channels responsible for carrying milk during breastfeeding – and does not invade other tissues or spread through the bloodstream.

The membrane that covers the tumor also does not break and the cancer cells are concentrated inside that nodule, which facilitates treatment.

This type of cancer, however, can also be multifocal. That is, there may be several foci of this neoplasm in the same breast. It is worth mentioning that all in situ breast cancer has the potential to become an invasive one.



2. Lobular carcinoma in situ

the lobular carcinoma in situ manifests as a non-palpable lesion. It affects the cells of the mammary lobes and does not have the ability to invade adjacent tissues, being more frequent in premenopausal women. According to one study published on Brazilian Journal of Developmentlobular carcinoma in situ represents about 0.30% of breast cancer cases.

3. Invasive ductal carcinoma

This type of breast cancer also affects the breast ducts, but it can invade the tissues that surround them – that’s why it’s called invasive. This ductal carcinoma is the most common among the invasive types, representing approximately 85% of cases.

It can grow locally or metastasize to other organs through veins and lymph vessels. Invasive ductal carcinoma is characterized by the presence of one or more hormone receptors on the surface of cells.

4. Invasive lobular carcinoma

Invasive lobular carcinoma is born in the breast lobes. Because it is invasive, it can still reach other tissues and grow locally or spread. It usually has estrogen and progesterone receptors on the surface of cells, but rarely the HER-2 protein.

This type of breast cancer accounts for approximately 10% of invasive breast cancers, according to a article from the Multidisciplinary Journal of the Faculty of Northwest Minas (FINOM).

5. Inflammatory breast cancer

This type of breast cancer is equivalent to 1% to 5% of cases of the disease. Inflammatory carcinoma presents as an inflammation in the region and often has a large extension. Most of the time, it first affects the glands that produce milk, causing swelling and redness in the breast.

According to the American Cancer Society, inflammatory breast cancer usually does not develop a lump, which impairs its perception in the self-examination or even in the mammogram, making the diagnosis – and, consequently, the treatment difficult. The chances of it spreading to other parts of the body and producing metastases are high.

6. Triple-negative breast cancer

THE Brazilian Society of Clinical Oncology (SBOC) indicates that triple-negative breast cancer is the most aggressive subtype. But, on the other hand, it is relatively rare. “Usually, it is linked to some genetic alteration”, emphasizes Carlos Machado.

Triple-negative breast cancer is also metastatic and grows and spreads faster than other types, in addition to limited treatment options and a high chance of recurrence (coming back even after the tumor is removed).

7. Paget’s Disease

This is yet another rare type of breast cancer, which accounts for 0.5% to 4.3% of all cases. Paget’s disease affects the skin of the areola and/or nipples and can affect both breasts at the same time.

Symptoms depend on the condition, as the disease can be asymptomatic or cause crusts and inflammation on the skin of the breast. It is not possible to define it as an in situ cancer or as a metastasisas it may be associated with ductal carcinoma in situ or invasive ductal carcinoma.

8. Breast Angiosarcoma

Angiosarcoma arises in the cells that line the blood or lymph vessels of the breasts. THE American Cancer Society warns about the risk of this type of breast cancer reappearing eight to ten years after treatment with radiotherapy. Because angiosarcoma tends to grow and spread quickly, its treatment typically involves mastectomy.

9. Phylloid Tumor

This tumor is quite rare, with regular and circumscribed borders. It can be benign or malignant and has a very fast growth. Unlike carcinomas, which usually affect the ducts or lobules, the Phyllodes tumor develops in the cells of the stroma, connective tissue that provides support and connection to the breasts.



Content for educational purposes only. Consult a Doctor.

The translator user relied on the following source:

Minha Vida Website – REF99827

Disclaimer – (English version>) This content has been prepared based on information from research, additional publications, or the translation/verification work of a volunteer editor of this web council. This is a non-profit service. It is strongly recommended that all details and information published be carefully verified. We never allow medication recommendations, medication package inserts or any medication guidance. We never allow partisan politics as information.

Isenção de responsabilidade – (versão em português): Este conteúdo foi preparado com base em informações de pesquisas, publicações adicionais ou no trabalho de tradução/verificação de um editor voluntário deste conselho web. Este é um serviço sem fins lucrativos. É altamente recomendável que todos os detalhes e informações publicadas sejam verificadas cuidadosamente. Nunca permitimos recomendações de medicamentos, bulas ou qualquer orientação sobre medicamentos. Nunca permitimos a política partidária como base para checagem. Para mais informações, leia nossos termos.

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