33 Special Types of Invasive Breast Carcinoma: Diagnostic Criteria ...

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Basal-like Breast Cancers • Often display medullary-like features. • Usually express low levels of ER/PR & lack HER2 over expression or amplification. • Resemble the myoepithelial-cell phenotype. • Mi Minority it hharbor b EGFR gene amplification lifi ti or aneusomy. • p53 expression or TP53 mutations in up to 85%. • ~30% of basal-like cancers are pRB-/p16+/p53+. • Carcinomas in BRCA1 germ-line mutation carriers are basal-like. • Some high-grade DCIS lack ER, PR, HER2. • These DCIS cases express ‘basal’ markers. • Triple-negative and basal-like cancers often lack in situ component. • Less frequently disseminate to LNs & bones. • Favor hematogenous g spread, p with a pproclivity y for metastatic deposits to the brain and lungs. • At present, use of the term “basal-like breast cancer” in diagnostic surgical pathology reports does not appear to be justified, as it does not lead to any direct clinical action. Other basal-like phenotype cancers are… • Medullary & atypical medullary carcinoma. • Metaplastic carcinomas. • Myoepithelial carcinoma (“metaplastic”). • Secretory carcinoma. • Adenoid cystic carcinomas. 10/8/2011 6
Triple-negative Breast Carcinomas • By definition, all lack ER,PR,HER2. • Up to 17% of breast carcinomas. • Lack of tailored therapies (i.e., for now). • Much overlap with “basal-like” cancers. ~75% of triple-negative cancers are basal-like. ~75% of molecular basal-like tumors are triple-negative. • Frequently affect younger patients. • More prevalent in African-Americans. Triple-negative Breast Carcinomas • Often present as interval cancers. • Shorter survival following first metastatic event. • Vast majority moderate to poorly differentiated. • Maybe ~10% of triple negative tumors are grade 1 of f3( 3 (others th di disagree & report tall llas GGr. 2 or 3) 3). • Favor hematogenous spread, with a peculiar proclivity to develop metastatic deposits in the brain and lungs. • Some apocrine & pleomorphic ILCs are triple negative. INTERESTING CASE 10/8/2011 7
Page 1 and 2: 33 Special Types of Invasive Breast
Page 3 and 4: Special Types of Invasive Breast Ca
Page 5 and 6: INVASIVE BREAST CARCINOMAS CONSIDER
Page 7: ER Neg. PR Neg. HER2 Neg. CK 5/6 Po
Page 11 and 12: E-cadherin E-cadherin EGFR ++ ER ne
Page 13 and 14: ER/PR Positive HER2 Negative INVASI
Page 15 and 16: Tubulolobular Signet-ring Histiocyt
Page 17 and 18: Illustrative Example: 61 y/o female
Page 19 and 20: E-Cadherin ER PR 10/8/2011 17
Page 21 and 22: LCIS vs DCIS • Patients with lobu
Page 23 and 24: Examples of E-cadherin staining in
Page 25 and 26: Classic Low-grade DCIS - E-cadherin
Page 27 and 28: E-cadherin IHC CASE D 10/8/2011 25
Page 29 and 30: E-cadherin IHC CASE E 10/8/2011 27
Page 31 and 32: Literature Summary: Correlation of
Page 33 and 34: 10/8/2011 31
Page 35 and 36: CD10 SMA MIB-1 10/8/2011 33
Page 37 and 38: Carter et al. Cancer 1977 & 1983
Page 39 and 40: Differential Diagnosis: 1. Invasive
Page 41 and 42: 10/8/2011 39
Page 43 and 44: SYNAPTOPHYSIN SMA 10/8/2011 41
Page 45 and 46: Nassar et al. (AJSP 2006;30:501-7.)
Page 47 and 48: Special Types of Invasive Breast Ca
Page 49 and 50: Tubular carcinoma • It has been d
Page 51 and 52: Tubular carcinoma Histopathology
Page 53 and 54: Flat Epithelial Atypia When should
Page 55 and 56: Microglandular adenosis + reticulin
Page 57 and 58: mitosis ductal ductal, NST tubular
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Treatment • Breast conservation t
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Cribriform carcinoma Histopathology
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Cribriform carcinoma Prognosis •
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Cribriform Carcinoma Pearls of Path
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Clinicopathological features Mucino
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Case 4 Mucinous carcinoma Mixed muc
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Treatment • Breast conservation a
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Incipient mucocele-like lesion Cyst
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10/8/2011 73
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10/8/2011 75
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SMA Dx: Spindle-cell Breast Carcino
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Dx: Pure Squamous Carcinoma 10/8/20
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Osseous Differentiation (Osteosarco
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Spindle-cell Carcinoma of the Breas
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Phyllodes y Tumors Phyllodes Tumor
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Diagnosis: Benign g (Low-grade) Phy
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Diagnosis: Malignant (High-grade) P
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10/8/2011 91
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10/8/2011 93
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Illustrative Case 10/8/2011 95
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SMA Calponin 10/8/2011 97
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Dx: Mixed Spindle-cell & Cl Classic
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Dx: Adenomyoepithelioma, Epithelioi
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10/8/2011 103
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10/8/2011 105
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Case 1 • 40 year old female • B
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What is your diagnosis? 1. Invasive
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Case 4 • Irregular large breast m
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Case 6 • Needle core biopsy of a
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343 What is your best diagnosis? 1.
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349 Case 9 What is your diagnosis?
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Case 11 Case 11 Case 12 • A 68 ye
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Case 13 • Needle core biopsy of a
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What is your diagnosis? 1. Intracys
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What is your best interpretation? 1
Page 129 and 130:
Case 18 What is your best interpret
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Case 20 • 35 year old female with
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Negative ER stain NEG ER Case 22
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What is your best interpretation? 1
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What is your diagnosis? 1. Secretor
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American Soiety of Clinical Patholo
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SPECIAL TYPES OF INVASIVE BREAST CA
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INVASIVE BREAST CARCINOMAS THAT ARE
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of lymphoid cells between sheets of
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studied, this taxonomy identifies s
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molecular subtypes. Indeed, the pea
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In summary, basal-like breast cance
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Page et al. (15) described a pleomo
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The classical pattern of infiltrati
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pathologic findings indistinguishab
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east carcinomas with overlapping fe
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standard" LCIS (their figure 2), wh
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References (lobular carcinoma): 1.
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25. Richter GO, Dockerty MB, Claget
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Breast Cancer Cooperative Group). L
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invasive micropapillary carcinoma m
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whether these lesions are in situ o
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irregular margin suggests the prese
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ich in elastic fibers. The connecti
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(i.e., much better than an antibody
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outcome of patients with intracysti
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Case 3: History: A 73 year old fema
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cases. In this small tubular carcin
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carcinoma in almost all tubular car
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Sclerosing papillary proliferations
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9. Bondeson L, Lindholm K. Aspirati
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43. Green I, McCormick B, Cranor M,
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mucinous carcinoma (7,11,12,14). In
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mucinous carcinoma. A fine-needle a
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with long-term follow-up [Abstract]
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cystic hypersecretory duct carcinom
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considerable secretion and/or morph
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4. Tavassoli FA, Norris HJ. Secreto
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Case 6: History: 66 year old female
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Adenoid cystic carcinoma (AdCC) is
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Because more than half of adenoid c
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Another family of salivary gland-ty
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Collagenous spherulosis is a recent
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cases: review of the literature and
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Case 7 the breast associated with l
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size (14). Metaplastic breast carci
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adenoma by others who prefer to avo
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survival rate than is usually repor
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it arises in other soft tissue site
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implies a relative risk for develop
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sclerosing adenosis wherein the str
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overgrowth (136). While acknowledgi
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As noted above, any soft-tissue sar
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J Med 73:1078-1082, 1973. 11. Barne
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40. Thorner PS, Kahn HJ, Baumal R,
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75. Fekete P, Petrek J, Majmudar B,
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microscopic, ultrastructural, and i
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2006 Apr;30(4):450-6 143. Liberman
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Case 8 Case history: A 50 year old
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secondary peripheral tumor nodules
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Definitive diagnosis of medullary c
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Pathol 1988;19:1340-6. 12. Rosen PP
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40. Di Bonito; Royen PM, Ziter FMH.
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Am J Clin Pathol 1979;72:383-389. 1
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