Download - Pathology Breast Carcinoma
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Pathology of Breast Pathology of Breast CancerCancer
Dr. Venkatesh M. ShashidharDr. Venkatesh M. ShashidharSenior Lecturer in PathologySenior Lecturer in PathologyFiji School of MedicineFiji School of Medicine
IntroductionIntroduction
Modified sweat glands.Modified sweat glands. Lobes and lobules of gland Lobes and lobules of gland in fat tissue stroma.in fat tissue stroma. Ducts emerge from acini of glandsDucts emerge from acini of glands Smaller ducts join to form lactiferous Smaller ducts join to form lactiferous
ductsducts Lactiferous ducts merge just beneath the Lactiferous ducts merge just beneath the
nipple to form a lactiferous sinus.nipple to form a lactiferous sinus. Then individually open on nipple Then individually open on nipple
Normal BreastNormal Breast
Myoepithelial Cells (ipx)Myoepithelial Cells (ipx)
DisordersDisorders CongenitalCongenital
Aplasia – turners, Juvenile hypertrophyAplasia – turners, Juvenile hypertrophy InflammatoryInflammatory
Infections acute/chronic – Trauma Fat necrosisInfections acute/chronic – Trauma Fat necrosis Duct ectasia discharge, sinusDuct ectasia discharge, sinus Fibrocystic disease – common – painful lumpsFibrocystic disease – common – painful lumps
NeoplasticNeoplastic Benign - FibroadenomaBenign - Fibroadenoma Malignant – Ca Malignant – Ca
Fibrocystic DiseaseFibrocystic Disease Fibroadenosis, Fibrocystic change, etc.Fibroadenosis, Fibrocystic change, etc. Commonest lump, 10-50% womenCommonest lump, 10-50% women ? Hormonal? Hormonal Periodic discomfort – pain.Periodic discomfort – pain. Eipethilial hyperplasia – premalignantEipethilial hyperplasia – premalignant Irregular palpable lumps – mimic ca.Irregular palpable lumps – mimic ca.
Adenosis – hyperplasia - cysts – papillomatosis – Adenosis – hyperplasia - cysts – papillomatosis – metaplasia – fibrosis.metaplasia – fibrosis.
Benign Neoplasms:Benign Neoplasms: Fibroadenoma Fibroadenoma Duct PapillomaDuct Papilloma AdenomaAdenoma Connective tissue tumorsConnective tissue tumors
Features (Fibroadenoma)Features (Fibroadenoma) Young age 3Young age 3rdrd decade. decade. Single, rounded, mobile, painless lumps. Single, rounded, mobile, painless lumps. No scarring or calcification.No scarring or calcification. Slit like glands in Fibrous stromaSlit like glands in Fibrous stroma
Breast Carcinoma Breast Carcinoma
20% of all cancers in 20% of all cancers in womenwomen
Commonest cause of death - Commonest cause of death - 35-55y35-55y
In UK 1 in 10-12 chancesIn UK 1 in 10-12 chances 1 in 8 women in US1 in 8 women in US Less incidence in AsiaLess incidence in Asia Majority of cancers arise in Majority of cancers arise in
the ducts.the ducts. Very rare before age 25Very rare before age 25
Risk Factors:Risk Factors:
Female sex..!, Age, Obesity, high fat diet Female sex..!, Age, Obesity, high fat diet Maternal relative with breast cancer. Maternal relative with breast cancer. Longer reproductive span. Longer reproductive span. Nulliparity, Oral contraceptivesNulliparity, Oral contraceptives Later age at first pregnancy. Later age at first pregnancy. Atypical epithelial hyperplasia. Atypical epithelial hyperplasia. Previous breast cancer/Endometrial Ca. Previous breast cancer/Endometrial Ca. Geographic factors - countryGeographic factors - country BRCA1 and BRCA2BRCA1 and BRCA2 genes genes
Etiology of Breast Carcinoma:Etiology of Breast Carcinoma:
Clinical Features:Clinical Features: Physiologic vs Pathologic changesPhysiologic vs Pathologic changes Lump / lumpsLump / lumps Lumps are much more common than CaLumps are much more common than Ca Characters of Characters of lumplump* and * and ageage** Discharge in many conditions.Discharge in many conditions. Hard, soft, inflammationHard, soft, inflammation Skin fixation / Skin fixation / SkinSkin retractionretraction * *
Diagnosis:Diagnosis: MammorgraphyMammorgraphy UltrasoundUltrasound Fine Needle Aspiration BiopsyFine Needle Aspiration Biopsy Core BiopsyCore Biopsy Excision BiopsyExcision Biopsy Frozen sectionFrozen section Immunoperoxidase,Immunoperoxidase, Molecular techniques – Gene detection.Molecular techniques – Gene detection.
Histological TypesHistological TypesHistologic Type Freq. (UK)
Infiltrating Duct Ca 63.6 (75)
Lobular Carcinoma 5.9 (10)
Infiltrating Ductal & Lobular Ca 1.6
Medullary Carcinoma 2.8 (3)
Mucinous (colloid) Carcinoma 2.1 (3)
Comedocarcinoma 1.4
Carcinoma-In-Situ 5%
Breast Carcinoma Breast Carcinoma
Breast Carcinoma Breast Carcinoma
Breast Carcinoma - SchirrousBreast Carcinoma - Schirrous
Infiltrating Duct Carcinoma: small hardInfiltrating Duct Carcinoma: small hard
Medullary Carcinoma: Large softMedullary Carcinoma: Large soft
Infiltrating Duct CarcinomaInfiltrating Duct Carcinoma
Infiltrating Duct CarcinomaInfiltrating Duct Carcinoma
Medullary Carcinoma: Inflammation.Medullary Carcinoma: Inflammation.
Infiltrating Duct Carcinoma: FibrosisInfiltrating Duct Carcinoma: Fibrosis
Schirrous CarcinomaSchirrous Carcinoma
Medullary CarcinomaMedullary CarcinomaSoft, inflammatory cellsSoft, inflammatory cells
Intraductal in-situ CarcinomaIntraductal in-situ Carcinoma
Lobular CarcinomaLobular Carcinoma
Intraduct Carcinoma-in-situIntraduct Carcinoma-in-situ
Intraduct CarcinomaIntraduct Carcinoma
Lymphatic spread – Peu-de Orange..Lymphatic spread – Peu-de Orange..
Spread of Breast Spread of Breast Carcinoma:Carcinoma:
Pagets DiseasePagets Disease
Pagets Disease (Epidermal invasion)Pagets Disease (Epidermal invasion)
Estrogen Receptor & Prognosis:Estrogen Receptor & Prognosis: Estrogen receptor expression is Estrogen receptor expression is
proportional to differntiation of tumorproportional to differntiation of tumor inversly proportional to prognosis and inversly proportional to prognosis and
response to tamoxifen (receptor antagonist) response to tamoxifen (receptor antagonist) therapy.therapy.
Demonstrated by Immunoperoxidase Demonstrated by Immunoperoxidase special stain.special stain.
HER2HER2 The HER2 proto-oncogene encodes a cell The HER2 proto-oncogene encodes a cell
surface receptor that is overexpressed in surface receptor that is overexpressed in approximately 25%-30% of breast cancers. approximately 25%-30% of breast cancers.
Trastuzumab (Herceptin®) is the first Trastuzumab (Herceptin®) is the first monoclonal antibody that targets the monoclonal antibody that targets the extracelluar domain of the HER2 protein, extracelluar domain of the HER2 protein, and inhibits growth of breast cancer cells and inhibits growth of breast cancer cells that over express this protein. that over express this protein.
Estrogen receptor (ER) in nucleiEstrogen receptor (ER) in nuclei
Immunoperoxidase Positivity Immunoperoxidase Positivity
Neg 1+
2+ 3+
Stag Definition 5-year
Surv (%) 7-year Surv (%)
I Tumor 2 cm or less without spread 96 92
II
Tumor 2-5cm with regional lymph node involvement but without distant metastases, OR > 5 cm in diameter without spread
81 71
III
Any size with skin/chest wall fixation, & axillary or internal mammary nodal involvement, without distant metastases
52 39
IV Tumor of any size with or without regional spread but with evidence of distant metastases
18 11