About Breast Cancers

Overview

Breast cancer is a type of cancer that occurs when the cells in a person's breast start growing uncontrollably. It is the most common type of cancer that develops in females. Breast cancer can also occur in men. The breast consists of three main parts: the lobules, which are glands that produce milk; the ducts, which are the tubes that carry the milk to the nipple; and the connective tissue, which is the surrounding fatty and fibrous tissue. Most breast cancers begin in the lobules or ducts.

Breast cancer can occur due to genetic mutations and DNA damage in the breast. Exposure to estrogen can also influence its development. It is important to note that breast cancer is often silent, meaning that many people do not realize they have symptoms until a routine breast cancer screening. Some common signs include noticing a lump on the breasts during self-examination.

It's crucial to detect breast cancer early as it allows for better treatment options and outcomes. Breast cancer cells can spread outside the breast through blood vessels and lymph vessels, so early detection of circulating cancer cells in the blood is important for understanding disease status and molecular features.

There are different types of breast cancer based on which cells become cancerous. The most common type is invasive ductal carcinoma, which starts in the cells of the ducts. Other types include lobular carcinoma, which starts in the lobules, and inflammatory breast cancer, where cancer cells block lymph vessels in the skin of the breast.

If you want to learn more about breast cancer, you can visit reputable sources such as the National Cancer Institute's breast cancer home page.

Types

Breast cancer is a complex disease with various types and subtypes. Here are some conditions and diseases that are considered types of breast cancer:

Invasive Ductal Carcinoma (IDC): This is the most common type of breast cancer. It starts in the milk ducts of the breast and can spread to other parts of the body if not treated.
Invasive Lobular Carcinoma (ILC): This type of breast cancer begins in the lobules, which are the milk-producing glands of the breast. It can also spread to other areas.
Ductal Carcinoma In Situ (DCIS): DCIS is a non-invasive or pre-cancerous condition where abnormal cells are found in the lining of the milk ducts. It has not spread outside the ducts to invade nearby tissue.
Lobular Carcinoma In Situ (LCIS): LCIS is also a non-invasive condition where abnormal cells are found in the lobules. It is not considered a true cancer but increases the risk of developing invasive breast cancer.
Paget's Disease of the Nipple: This rare form of breast cancer starts in the nipple and may extend to the areola (the darker area surrounding the nipple). It can cause changes in the skin, such as redness, itching, or flaking.
Phyllodes Tumor: Phyllodes tumors develop in the connective tissues of the breast and can be either benign or malignant. Surgical removal is often recommended for treatment.
Metaplastic Breast Cancer: This is a rare form of breast cancer where cancer cells have characteristics of both epithelial (glandular) and mesenchymal (connective tissue) cells.

Causes and Risk Factors

The cause of breast cancer is genetic mutation in certain genes that affect the growth of cells in breast tissue. There are multiple factors that increase a person’s chances of developing breast cancer.

Non-modifiable risk factors of breast cancer are those that cannot be changed or controlled. These include:

Age: Breast cancer risk increases with age
Reproductive parameters: Early menarche (start of menstrual periods) before age 12, delayed menopause after age 55, or delayed childbearing (first full-term pregnancy after age 30)
Genetics: Inherited changes in certain genes and family history of breast cancer
Exposure to radiation
High breast density

Modifiable risk factors are those that possibly can be changed or controlled through lifestyle or behavior choices. These include:

Excess body weight or high body mass index (BMI)
Low physical activity or sedentary lifestyle. Physical activity is considered one of the most important modifiable risk factors for breast cancer. Studies have shown that exercise performed in both adolescence and adulthood can help reduce the risk of developing invasive breast cancer.
Excessive alcohol consumption
Smoking, including second-hand smoking
Unhealthy diets
Use of oral contraceptive pills (OCP)

It's important to note that while these risk factors may increase the likelihood of developing breast cancer, they do not guarantee that someone will develop the disease. Regular screenings and early detection are crucial for identifying breast cancer at an early stage when treatment is most effective.

Symptoms

Breast cancer can present with different symptoms depending on the stage and severity of the disease. In the early stages, the most common symptoms of breast cancer include:

New lumps: A new mass or lump in the breast is often the first sign of breast cancer. These lumps may feel hard and have irregular edges. However, it's important to note that not all breast lumps are cancerous.
Changes to skin texture or color: Breast cancer can cause changes in the texture or color of the skin overlying the affected area. This can manifest as dimpling or thickening of the skin.
Swelling: Some people with early-stage breast cancer may experience swelling in the breast or surrounding lymph nodes.

It's important to remember that not all types of breast cancer present with these symptoms, and some forms of breast cancer may not cause any symptoms in the early stages. That's why attending regular screenings and conducting self-exams are crucial for early detection.

As breast cancer progresses or becomes more severe, additional symptoms may develop. These can include:

Breast or nipple pain: Some people may experience pain in the breast or nipple as the disease progresses.
Nipple discharge: Nipple discharge that is not breast milk can be a sign of advanced breast cancer.
Changes in breast size or shape: Breast cancer can cause changes in the overall size, shape, or appearance of the breast or nipple.
Skin changes: Advanced breast cancer can lead to skin changes on the breast, such as redness, scaliness, or skin dimpling.
Inverted nipple: In some cases, a nipple that was previously outward-facing may turn inward (inverted).
Swollen lymph nodes: As breast cancer spreads to nearby lymph nodes, they may become tender, enlarged, or palpable under the arm or in the neck area.

Diagnosis

To diagnose breast cancer, healthcare professionals use a combination of examinations, tests, and procedures. These help to identify any signs of breast cancer and determine the type of cancer present. Here are the commonly performed methods:

Breast examination: A healthcare professional will carefully examine the breasts and underarm area for any lumps, changes in texture, or other irregularities. They may also ask the person to perform self-breast exams at home.
Mammogram: This is a type of X-ray specifically designed for breast tissue. It creates detailed images that can detect any early signs of breast cancer, such as tumors or abnormalities.
Ultrasound: Using sound waves, a handheld device called a sonogram creates images of the inside of the breast. This helps doctors differentiate between solid masses and fluid-filled cysts.
MRI (magnetic resonance imaging): An MRI scan uses strong magnetic fields and radio waves to generate detailed images of the inside of the breast. It provides additional information about the extent and characteristics of any abnormalities.
Biopsy: If initial tests indicate the presence of breast cancer or suspicious findings, a biopsy is performed. During a biopsy, a small sample of breast tissue is removed for further examination under a microscope. This helps determine the type and grade of cancer present.

Additional examinations, tests, and procedures may be performed to determine the specific type of breast cancer:

Pathology evaluation: After a biopsy, pathologists examine the tissue samples under a microscope to identify specific characteristics of the cancer cells. This information helps determine the subtype and grade of breast cancer.
Estrogen Receptor (ER), Progesterone Receptor (PR), and HER2 Testing: These tests analyze the presence or absence of specific receptors on cancer cells that can influence treatment options. They help determine if a tumor is hormone receptor-positive or HER2-positive.
Staging: Once diagnosed with breast cancer, doctors perform various imaging tests like CT scans or bone scans to determine the stage or extent of cancer spread. Staging helps guide treatment decisions.

It's important to note that these examinations, tests, and procedures are performed by healthcare professionals who specialize in diagnosing and treating breast cancer. If you have any concerns or notice changes in your breasts, it's essential to seek medical attention promptly for proper evaluation and diagnosis.

Treatment Options

When it comes to treating breast cancer, the goals of treatment may vary depending on the specific type and stage of the cancer, as well as the individual's overall health. However, the general goals of treatment for breast cancer are:

Remove or destroy cancer cells: The primary goal of treatment is to remove or destroy the cancer cells in the breast. This can be achieved through various methods, including surgery and radiation therapy.
Surgery: Depending on the type, size, and location of the breast cancer tumor(s), a surgeon may perform a lumpectomy (removing only the tumor and a small margin of surrounding tissue) or a mastectomy (removing the entire breast). In some cases, nearby lymph nodes may also be removed.
Radiation therapy: This involves using high-energy beams to target and kill cancer cells. It is often used after surgery to destroy any remaining cancer cells in the breast area.

Prevent recurrence: Another important goal of treatment is to prevent the cancer from coming back. This can be achieved through hormone therapy, targeted therapy, and systemic treatments like chemotherapy or immunotherapy.

Hormone therapy: Certain types of breast cancers are hormone receptor-positive, meaning they rely on hormones like estrogen or progesterone to grow. Hormone therapy works by blocking these hormones or reducing their levels in the body, thus inhibiting cancer growth.
Targeted therapy: Some breast cancers have specific genetic mutations that can be targeted with medications. These targeted therapies work by interfering with specific molecules involved in cancer growth and spread.
Chemotherapy: Chemotherapy uses powerful drugs to kill rapidly dividing cells, including cancer cells. It can be administered orally or intravenously and is often used to treat breast cancers that have spread beyond the breast.
Immunotherapy: Immunotherapy helps stimulate the body's immune system to recognize and attack cancer cells. It can be used in certain cases of advanced or metastatic breast cancer.

Improve overall survival and quality of life: Treatment aims to improve overall survival rates while also maintaining or improving quality of life for individuals with breast cancer.

In addition to these treatment options, there are also lifestyle behavior changes that can support treatment goals for breast cancers:

Healthy diet: A balanced diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats can help support overall health during treatment.
Regular exercise: Engaging in regular physical activity can help improve strength, reduce fatigue, and boost overall well-being during and after treatment.
Emotional support: Emotional support from loved ones, support groups, or mental health professionals can play a crucial role in coping with the emotional challenges that come with a breast cancer diagnosis and treatment.

It's important to note that each individual's treatment plan will be personalized based on their specific situation. Therefore, it's essential for individuals diagnosed with breast cancer to consult with their healthcare team to determine the most appropriate treatment options for them.

Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.

Progression or Complications

The natural progression of breast cancer can vary depending on the specific type and stage of the cancer, as well as individual factors such as age and overall health. However, in general, breast cancer can progress through several stages:

Stage 0: This is the earliest stage of breast cancer, also known as ductal carcinoma in situ (DCIS). The cancer cells are confined to the milk ducts and have not spread to surrounding tissues. At this stage, the cancer is considered non-invasive.
Stage 1: At this stage, the cancer is still relatively small and localized to the breast tissue. It may or may not have spread to nearby lymph nodes.
Stage 2: In stage 2, the cancer has grown larger and may have spread to nearby lymph nodes. There are two subcategories within stage 2: 2A and 2B, depending on the size of the tumor and whether or not it has spread to lymph nodes.
Stage 3: At this stage, the cancer is considered locally advanced. It may have spread to nearby lymph nodes and possibly other tissues or organs in the vicinity of the breast.
Stage 4: This is the most advanced stage of breast cancer, also known as metastatic breast cancer. The cancer has spread beyond the breast and nearby lymph nodes to other parts of the body, such as bones, liver, lungs, or brain.

Complications of breast cancer can also vary depending on the specific type and stage of the cancer. Some common complications include:

Metastasis: When breast cancer spreads to other parts of the body, it can cause complications in those organs or tissues. For example, if it spreads to the bones, it can cause bone pain or fractures.
Lymphedema: Surgery or radiation therapy for breast cancer can sometimes damage or block lymph nodes, leading to swelling in the arm or chest area.
Fatigue: Many people with breast cancer experience fatigue, which can be caused by both the disease itself and its treatments.
Emotional and psychological impact: Breast cancer diagnosis and treatment can have a significant emotional and psychological impact on individuals. It can cause anxiety, depression, fear of recurrence, body image issues, and impact overall quality of life.

The impact of treatment on progression or complications of breast cancer depends on several factors including the type and stage of the cancer, as well as individual health factors. It's important to note that each person's treatment plan will be individualized based on their specific situation, so it's essential to consult with a healthcare professional for personalized advice regarding treatment options for breast cancer.