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57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine Houston Society of Clinical Pathologists Symposium Clinical Presentation 66 y.o woman with hypothyroidism (s/p thyroidectomy), obesity, depression Screening mammogram new 1.6cm mass at left 1 o’clock Add mammo, u/s, MRI circumscribed, lobulated mass suspicious with no other lesions No nipple inversion, discharge or skin involvement, pain Prominent LN’s in the left axilla Clinical Presentation No sig PMH PSxH Thyroidectomy (80’s), hernia repair, Csection (remote) Gen Ros: No fever, chills, sweats, no back pain, bone pain, headaches, dizziness, weakness, or fatigue HEENT: Negative CV: Negative Resp: Negative GI: Negative GU: Negative Muscloskeletal: Negative

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Page 1: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 1

Case Discussion

Chandandeep Nagi, MDAssociate Professor

Baylor College of Medicine

Houston Society of Clinical Pathologists Symposium

Clinical Presentation

• 66 y.o woman with hypothyroidism (s/p thyroidectomy), obesity, depression

• Screening mammogram– new 1.6cm mass at left 1 o’clock

• Add mammo, u/s, MRI– circumscribed, lobulated mass– suspicious with no other lesions 

• No nipple inversion, discharge or skin involvement, pain

• Prominent LN’s in the left axilla

Clinical Presentation

• No sig PMH• PSxH

– Thyroidectomy (80’s), hernia repair, C‐section (remote)

• Gen Ros:– No fever, chills, sweats, no back pain, bone pain, headaches, 

dizziness, weakness, or fatigue 

• HEENT: Negative• CV: Negative• Resp: Negative• GI: Negative • GU: Negative• Muscloskeletal: Negative

Page 2: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 2

10/20/15 Screening mammogram 

There is a new 1.7 cm mass with an indistinct margin and a few associated calcifications in the left breast at 1 o'clock middle depth. 

10/30/15 Left Breast Diagnostic Mammogram

There is a new 1.7 cm oval mass with a circumscribed margin in the left breast at 1 o'clock middle depth. An ultrasound is recommended. 

10/30/15 Left Breast Ultrasound

There is a 1.6 cm x 1.5 cm x 1.1 cm hypoechoic lobulated mass with a microlobulated margin in the left breast at 1 o'clock middle depth. 

Color flow imaging demonstrates that there is vascularity present. 

Page 3: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 3

U/S guided core biopsy

U/S guided core biopsy

U/S guided core biopsy

Page 4: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 4

U/S guided core biopsy

CK 5/6 CK 17

U/S guided core biopsy

ER CD117CD117

Lumpectomy

Page 5: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 5

Lumpectomy

Lumpectomy

Diagnosis

• Infiltrating Adenoid Cystic Carcinoma

– Solid type

– 2.0cm

– High mitotic rate

– No LVI

– Triple Negative with basal CK and CD117 positivity

• Negative Margins

• Negative Nodes

Page 6: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 6

ACC ‐ Epidemiology

Lakhani SR, Ellis IO, Schnitt SJ, Tan PH, van de Vijver MJ. WHO Classification of Tumors of the Breast. Vol. 4. France: IARC; 2012SEER Stat Fact Sheets: Breast. Bethesda: National Cancer Institute. 

ACC ‐ Epidemiology

SEER Stat Fact Sheets: Breast. Bethesda: National Cancer Institute.Ghabach B. et al. Breast Cancer Research 2010 12:R54 

ACC ‐ Epidemiology

• Uncommon, less than 0.1%– Most small, recent larger cohorts

• Geschickter et al, 1945

• Age– 33 to 97 with mean of 60/63

• No change in incidence rate– Lower in African‐Americans

• Mostly solitary lesions

• Occasional cases in males

Page 7: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 7

Clinical Presentation

• Most often palpable– Circumscribed and/or lobulated– Below nipple (up to 50%)– May be painful

• Unlike salivary not correlated with perineural

• Mammographic– Irregular or lobular mass– Subtle architectural distortion

• U/S– Irregular shaped– Hypoechoic or heterogeneous– Parallel to skin lines, no halo or posterior shadowing

• MRI– Lobulated or irregular masses– Enhancement – rapid and heterogeneous

Mammography

Glazebrook KN et al. AJR:194, May 2010 (1391‐6)

Page 8: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 8

Gross Features

• Firm, white

– Occasional microcysts

• Circumscribed or ill‐defined

• May have minimal stromal response

• Mean size is 3cm (0.5 to 12cm)

Histology

• Similar to counterparts in salivary gland

• Morphologically heterogeneous

• Dual cell population of luminal and myoepithelial/basal cells in 3 patterns

– Cribriform

– Reticular (trabecular)‐tubular

– Solid

• True glandular spaces and pseudolumina

Histology

• Luminal cells form solid nests or small lumens– May be empty or filled with secretions

– Cells are cuboidal to spindle shaped

• Myoepithelial/basal cells can form large cribriform spaces– Lined by myoepithelial type cells

• Scant cytoplasm, round to oval nuclei

– Filled with basement membrane type material

– Collagenous, myxoid, mucinous

• Squamous and/or sebaceous metaplasia

Page 9: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 9

Histology

Histology

Histology

Page 10: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 10

Grading

• Nottingham histologic grading system

• Others

– Proportion of solid growth

• No solid elements (grade I)

• <30% (grade II)

• >30% (grade III)

• Unclear about predicting prognosis

• Possibly helpful in treatment

IHC

• Luminal type cells– Positive for CK7, Cam5.2, C‐Kit (CD117), EMA

– Usually negative for ER, PR, Her2

• Myoepithelial type cells– positive for p63, SMA, CK5/6 (basal), laminin

• Low Ki‐67 rates– Higher in higher grade; unclear if related to outcome

• Triple negative breast cancers with basal like features

IHC

ER CD117

Page 11: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 11

IHC

CD117 CD117

Association / genesis

• Microglandular adenosis• Tubular adenosis• Medullar carcinoma

– Basal like transcriptome– Higher frequency of alterations

• Insitu component• Adenomyoepithelioma• Metaplastic carcinoma / adenosquamous

– Immunohistochemical similarities– Higher frequency of alterations

Molecular / Cytogenetics

• t(6;9)(q22‐23;p23‐24)– Fusion between oncogene MYB and trnascription factor NFIB– In most (>90%)

• Fewer abberations compared to other basal like• Less aneuploidy• Normal BRCA1 gene function• ?stem cell like properties• ERalpha36

– MAPK/ERK– EGFR

• SOX10, IMP3

Page 12: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 12

DDX

• Infiltrating cribriform carcinoma– Empty or filled with secretory material– Almost all positive for ER, PR– No myoepithelial like cells

• DCIS , cribriform type– Myoepithelial cells at periphery– Almost all ER/PR positive

• Collagenous spherulosis– Fenestrated appearance– Eosinophilic fibrillar and/or hyaline spherules of basement membrane 

like material (positive PAS and alcian blue)– Inner myoepithelial outer luminal cells

• Adenomyoepithelial Carcinoma• Cylindroma

Prognosis / Rx

• Excellent prognosis– 90% – 100% survival at 10 yrs

– Local recurrence : 6%

– Axillary LN metastasis : 3%

– Distant metastasis and death : 3%• Lung; bone, liver, brain, kidney 

• Usually breast conservation surgery– Chemo controversial

– Radiotherapy may help

– LN +/‐

Page 13: Nagi - Nagi ACC - HSCP 2016.pdf57th Annual HSCP Spring Symposium 4/16/16 Chandandeep Nagi, MD 1 Case Discussion Chandandeep Nagi, MD Associate Professor Baylor College of Medicine

57th Annual HSCP Spring Symposium 4/16/16

Chandandeep Nagi, MD 13

Summary

• Triple negative with good prognosis

• Score as poor prognosis using 21 gene recurrence score or 70 gene profile score

– Histology more important than Molecular

• Important not to miss

THAT’S ALL FOLKS

ANY QUESTIONS ?