What is breast cancer?
Breast cancer starts when cells in the breast usually form a tumorthat is malignant and can invade surrounding tissues or spread to distant areas of the body.
Breast Cancer is the most widely recognized tumour among ladies, after skin cancer. It is additionally the second driving reason for malignancy demise in ladies after lung tumour. Reassuringly, the passing rate from Breast Cancer has declined a bit as of late, maybe because of more noteworthy mindfulness and screening for this sort of disease, and also better medications.
Breast Cancer is an ailment that happens when cells in bosom tissue change (or transform) and continue recreating. These anomalous cells for the most part group together to shape a tumour. A tumour is destructive (or threatening) when these anomalous cells attack different parts of the breast or when they spread (or metastasize) to different zones of the body through the circulatory system or lymphatic framework, a system of vessels and hubs in the body that assumes a part in battling a disease.
Breast Cancer generally begins in the drain creating organs of the breast (called lobules) or the tube-formed channels that convey drain from the lobules to the areola. Less regularly, the disease starts in the greasy and stringy connective tissue of the breast.

How to diagnose breast Cancer?

• Clinical Breast Exam
  Amid a clinical breast exam, your social insurance supplier examines your breast, underarms, and collarbone territory. On the off chance that there is a protuberance, your medicinal services supplier will feel its size, shape, and surface. She will likewise check whether it moves effectively. Bumps that are delicate, smooth, round, and versatile are probably going to be generous. Hard, strangely formed ones that vibe solidly connected inside the bosom will probably be disease, however you will require additionally tests to analyse the issue.
• Mammogram
  Mammograms are x-rayed pictures of breast tissue. They can regularly demonstrate an irregularity before it can be felt. They additionally can uncover bunches of modest bits of calcium. Bumps or spots can be from disease, precancerous cells, or different conditions. On the off chance that you have a bump or calcium stores, you may require additionally tests to recognize the nearness of strange cells. You ought to get consistent screening mammograms to identify breast malignancy early.
• Other Imaging Tests
  Ultrasound gadgets utilize indistinct sound waves to make pictures that show whether a breast knot is strong, loaded with liquid (a pimple), or a blend of both. Blisters more often than not will be not disease. Strong protuberances might be. Attractive reverberation imaging (MRI) gadgets detail the distinction amongst ordinary and ailing breast tissue.
• Biopsy
  Biopsies evacuate little measures of breast tissue for investigation. They are the main beyond any doubt approach to tell in the event that you have disease. A pathologist breaks down the tissue or liquid to decide the sort of malignancy.
• Testing Breast Tissue
  Unique tests on the sick tissue may help decide treatment.
  Hormone receptor tests: Some breast tumours require the hormones estrogen, progesterone, or both, to develop. In the event that they are discovered, your social insurance supplier may suggest hormone treatment.
  HER2/neu test: HER2/neu is a protein found on a few sorts of growth cells. This test demonstrates whether the tissue either has excessively HER2/neu protein or an excessive number of duplicates of its quality. In the event that the breast tumour has excessively HER2/neu, at that point focused on treatment, which utilizes medications to obstruct the development of breast disease cells, might be a choice.

Symptoms and Risk
Signs and symptoms of breast cancer may include:

• A breast lump or thickening that feels different from the surrounding tissue
• Change in the size, shape or appearance of a breast
• Changes to the skin over the breast, such as dimpling
• A newly inverted nipple
• Peeling, scaling, crusting or flaking of the pigmented area of skin surrounding the nipple (areola) or breast skin
• Redness or pitting of the skin over your breast, like the skin of an orange

What are the types of breast cancer?
There are two types of breast cancer tumors: those that are non-cancerous, or ‘benign’, and those that are cancerous, which are ‘malignant’.

• Benign Tumour

When a tumor is diagnosed as benign, doctors usually don’t remove it. Even though these tumors are not generally aggressive toward surrounding tissue, occasionally they may continue to grow, pressing on organs and causing pain or other problems. In these situations, the tumor is removed, allowing pain or complications to subside.

• Malignant Tumour

Malignant tumors are cancerous and aggressive because they invade and damage surrounding tissue. When a tumor is suspected to be malignant, the doctor will perform a biopsy to determine the severity or aggressiveness of the tumor.

• Metastatic Cancer
• Metastatic Cancer is when cancer cells of a malignant tumor spread to other parts of the body, usually through the lymph system, and form a secondary tumor.

What are the grades of tumour?
The tumor cells are graded based on a scale of one to three which represents how aggressive the cancerous cells are:

• Low grade - Well-differentiated
• Intermediate grade - Moderately differentiated
• High grade - Poorly differentiated

Low grade tumors look like normal tissue and high grade tumors look abnormal under the microscope and tend to be aggressive.

Treatment Method
Local treatments: Some treatments are called local therapies. In this, they treat the tumour without affecting the rest of the body. Types of local therapy used for breast cancer include:

• Surgery
• Radiation therapy

They are more useful for earlier stage cancers. These treatments are more likely to be useful for earlier stage (less advanced) cancers, although they might also be used in some other situations.
Fundamental medicines: Breast malignancy can likewise be dealt with utilizing drugs, which can be given by mouth or specifically into the circulatory system. They can achieve tumor cells anyplace in the body, purported as fundamental treatments. Contingent upon the kind of breast growth, a few unique sorts of medications may be utilized, including:
The main breast cancer treatment options may include:

• Radiation therapy (radiotherapy)
• Surgery
• Biological therapy (targeted drug therapy)
• Hormone therapy
• Chemotherapy

SURGERY

• Lumpectomy- Removal of tumour and a small margin of healthy tissue around it surgically. It is often known as breast sparing surgery in breast cancer.
• Mastectomy- surgically removing the breast. Simple mastectomy involves removing the lobules, ducts, fatty tissue, nipple, areola, and some skin. Radical mastectomy means also removing muscle of the chest wall and the lymph nodes in the armpit.
• Sentinel node biopsy- one lymph node is surgically removed.
• Axillary lymph node dissection- if the sentinel node was found to have cancer cells, the surgeon may recommend removing several nymph nodes in the armpit.
• Breast reconstruction surgery- a series of surgical procedures aimed at recreating a breast so that it looks as much as possible like the other breast. This procedure may be carried out at the same time as a mastectomy. The surgeon may use a breast implant, or tissue from another part of the patient's body.

RADIATION THERAPY (RADIOTHERAPY)
After one month of surgery or chemotherapy, radiotherapy occurs. The patient may require three to five sessions per week for three to five sessions per week for three to six weeks.
The type of breast cancer the woman has will decide what type of radiation therapy she may have to undergo. In some cases, radiotherapy is not needed.
Radiation therapy types include:

• Breast Radiation Therapy - after a lumpectomy, radiation is administered to the remaining breast tissue
• Chest Wall Radiation Therapy - this is applied after a mastectomy
• Breast Boost - a high-dose of radiation therapy is applied to where the tumour was surgically removed.
• Lymph Nodes Radiation Therapy - the radiation is aimed at the axilla (armpit) and surrounding area to destroy cancer cells that have reached the lymph nodes
• Breast Brachytherapy - patients with early-stage breast cancer in the milk ducts which has not spread, seem to benefit from undergoing breast brachytherapy with a strut-based applicator.

Chemotherapy
Medications are used to kill the cancer cells - these are called cytotoxic drugs. The oncologist may recommend chemotherapy if there is a high risk of cancer recurrence, or the cancer spreading elsewhere in the body. This is called adjuvant chemotherapy. If the tumours are large, chemotherapy may be administered before surgery. The aim is to shrink the tumour, making its removal easier. This is called neo-adjuvant chemotherapy.
Chemotherapy may also be administered if the cancer has metastasized. It is also useful in reducing some of the symptoms caused by cancer.
Chemotherapy may help stop estrogen production. It encourages the growth of breast cancers.
Protecting Female Fertility – An arsenic-based chemo medication, which is very gentle on the ovaries are used for attacking cancer.

Hormone Therapy (Hormone Blocking Therapy)
Hormone therapy is used for breast cancers that are sensitive to hormones. These types of cancer are often referred to as ER positive (estrogen receptor positive) and PR positive (progesterone receptor positive) cancers. The aim is to prevent cancer recurrence. This therapy is used after surgery or may be used before to shrink the tumor.
If for health reasons, the patient cannot undergo surgery, chemotherapy or radiotherapy, hormone therapy may be the only treatment she receives.

Biological Treatment (Targeted Drugs)
Some drugs are given to the patient to destroy the cancer cells.

Bone-directed Treatments
When breast cancer spreads, it often goes to the bones. Some drugs can help treat the spread of cancer to the bones and might even help prevent it. Newer drugs are introduced to treat breast cancer that has spread to the bones. They are also looking for ways to identify and target the markers that affect bone turnover.