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Lab 7: Handling and Evaluation of Breast Cancer Biopsy. Objectives:. To evaluate the clinical and histopathologic features of our patients registered into the program . 2. To understand methods for diagnosis of the breast cancer biopsy .
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Lab 7: Handling and Evaluation of Breast Cancer Biopsy
Objectives: • To evaluate the clinical and histopathologic features of our patients registered into the program. 2. To understand methods for diagnosis of the breast cancer biopsy. 3. To learn the current guidelines for breast cancer screening.
CANCER • Cancer starts when cells begin to grow out of control. • Cells in nearly any part of the body can become cancer, and can spread to other areas of the body.
Breast Cancer • Breast cancer is a disease in which malignant (cancer) cells form in the tissues of the breast. • Metastatic breast cancer occurs in one third of patients affecting bone, liver and lung, ultimatelyleading to death. • More than 70%ofhuman breast cancers (BCs) are hormone-dependentand approximately 15%arehormone-receptor-negativewhich includes BCs lacking estrogens receptor expression.
Breast Cancer • Breast cancer is a heterogeneous disease with varied morphological appearances, molecular features, behavior, and response to therapy. • Current routine clinical management of breast cancer relies on the availability of robust clinical and pathological prognostic and predictive factors to support clinical and patient decision making in which potentially suitable treatment options are increasingly available.
Types of breast cancers Most breast cancers are carcinomas, a type of cancer that starts in the cells (epithelial cells) that line organs and tissues like the breast.
Other types of cancers can occur in the breast, too, such as sarcomas, which start in the cells of muscle, fat, or connective tissue.
Cont. • One of the best-established prognostic factors in breast cancer ishistological grade, which represents the morphological assessment of tumor biological characteristics and has been shown to be able to generate important information related to the clinical behavior of breast cancers.
Cont. • In early-stage breast cancer, where the use of systemic therapy has to be determined for every patient, the three main prognostic determinants used in routine practice are : • lymph node (LN) status, • tumor size • and histological grade.
Cont. • Although the current well-established clinical and histological factors and some well-defined biological factors (that is, hormone receptors and HER2 expression) show strong association with prognosis and outcome, there are increasing concerns that these variables are limited in their ability to capture the diversity of clinical behaviors of breast cancer and that they would not be sufficient to tailor the therapy to individual patients.
Cont. • Tumor grade has increased these concerns. • The introduction of high-throughput technologies that survey thousands of genes and their products in a single assay, coupled with powerful analytical tools, has opened up new avenues for classifying breast cancer into biologically and clinically distinct groupsbased on gene expression patterns and DNA copy number alterations.
Cont. • To evaluation of Histological tumor grade it is prepared hematoxylin-eosin-stained tumor tissue sections to be assessed by an appropriately trained pathologist using a standard protocol. • Histology Grade based on the evaluation of three morphological features: (a) degree of tubule or gland formation, (b) nuclear pleomorphism, and (c) mitotic count.
Cont. • The same line of therapy however had little or no effect on patients with estrogen receptor negative (ER-) breast cancer. • Another important progress in breast cancer therapy was identifying and targeting the Her2 subtype of epidermal growth factor receptors (EGFR) which improved the outcome of Her2 positive patients. • Triple negative breast cancers (TNBCs) are called such because they lack receptors for estrogen, progesterone and Her2.
Anybreast abnormality is a cancer? • A lump or spot in the breast can be made of normal cells or cancer cells. Cancer cells are cells that grow in an uncontrolled way. • They may stay in the place where they started to grow, or they may grow into the normal tissue around them. Cancer cells may also spread beyond the breast. The abnormal lump or spot may be found using mammography or other testing methods. • A procedure called a biopsy removes a piece of tissue from the lump or spot to find out if cancer cells are present.
Is breast cancer invasive? • If breast cancer is found, it’s important to know whether the cancer has spread outside the milk ducts or lobules of the breast where it started. • Non-invasive cancers stay within the milk ducts or milk lobules in the breast. They do not grow into or invade normal tissues within or beyond the breast.
Cont. • Non-invasive cancers are sometimes called in situ or pre-cancers. If the cancer has grown into normal tissues, it is calledinvasive. • Most breast cancers are invasive. Sometimes cancer cells spread to other parts of the body through the blood or lymph system. • When cancer cells spread to other parts of the body, it is called metastatic breast cancer. In some cases, a breast cancer may be both invasive and non-invasive.
There are four types of biopsy used to check for breast cancer: • Excisional biopsy : The removal of an entire lump of tissue. • Incisional biopsy : The removal of part of a lump or a sample of tissue. • Core biopsy : The removal of tissue using a wide needle. • Fine-needle aspiration (FNA) biopsy : The removal of tissue or fluid, using a thin needle.
Types of treatment 1. Surgeryis the primary method of treatment and few patients elect to bypass this option as it is considered necessary to stop cancer progression. 2. Radiation therapy is the next step, which uses x-rays and other radioactive materialsto damage DNAandcell membranes of cancer cells. 3. Chemotherapyis the third step, which is the use of chemical agents that destroy dividing cells or stop their division. One of the most popularly used chemotherapeutic agents is cisplatin, which in general is a systemic treatment.
Inflammatory Breast Cancer • Inflammatory breast cancer is a rare and very aggressive disease in which cancer cells block lymph vessels in the skin of the breast. This type of breast cancer is called “inflammatory” because the breast often looks swollen and red, or inflamed. • Inflammatory breast cancer is rare, accounting for 1 to 5 percent of all breast cancers diagnosed in the United States. Most inflammatory breast cancers are invasive ductal carcinomas, which means they developed from cells that line the milk ducts of the breast and then spread beyond the ducts. • Compared with other types of breast cancer, inflammatory breast cancer tends to be diagnosed at younger ages. • Inflammatory breast tumors are frequently hormone receptor negative, which means they cannot be treated with hormone therapies, such as tamoxifen, that interfere with the growth of cancer cells fueled by estrogen.
