Eugene Oncology Flashcards
increased lifetime estrogen exposure, BRCA, 1st degree relative, increased density, obesity, alcohol
Breast Cancer : Epi/Risk Factors
Most common cancer in women in US (rising), 2nd leading cause of death (falling), 1 in 8
Breast Cancer : Signs/Symptoms/Findings
sporadic>familial>hereditary(BRCA1)>BRCA2
Breast Cancer Etiology
chro 17q OR 13q mutation of dsDNA repair
BRCA 1 and 2
1:400 (1:40 Ash. Jews), 40%-60% breast, 20-40%ovarian, earlier onset, male risk of breast, prostate and pancreative cancer
BRCA cancer prevalence
> 1% of cells are ER+ or PR+ (treat with tamoxifen)
Breast Cancer : Good Prognosis (most have 85-100% 5 year survival
LN mets, more aggressive/less differentiated, HER2 gene
Breast Cancer, poor prognosis
EGFR, chro 17, amplification of cell proliferation and resistance to apoptosis, tx: trastuzumab + chemo
HER2 mutations
don’t treat with doxy. Increased risk of cardiotoxicity
HER2 mutation Breast Cancer (Trastuzumab)
lumpectomy & radiation or total mastectomy
Local therapy for Breast Cancer
antiestrogen therapy: oophorectomy, leuprolide (blocks hypo-pit axis), tamoxiphen. Post-menopuase: anastrole, letrozole, tamoxifen
Er+ breast tumors
cyclophosphamide/cytotoxan, doxorubicin/adriamycin, paclitaxel/taxol
general chemo for breast cancer
paclitaxel/taxol
indicated for breast cancer in young women with poorly differentiated triple negative tumors (ER-,PR-,HER-)
cancerous cells but no invasion
stage 0 breast cancer
tumor <2cm, no LN
stage 1 breast cancer
tumor 2-5 cm or <4 LN
stage 2 breast cancer
tumor >5 cm or >4 LN
stage 3 breast cancer
metastatic
stage 4 breast cancer
25% of breast Ca
Ductal Carcinoma In Situ (DCIS): Epi/Risk Factors
microcalcification on mamm, fills ductal lumen, nuclear atypia, stage 0
Ductal Carcinoma In Situ (DCIS): Signs/Symptoms/Findings
stage 0 neoplastic transformation of E-cadherin+ large ductal epithelial cells (noninvasive)
Ductal Carcinoma In Situ (DCIS): Pathophysiology/Diagnosis
8-10x risk of invasive carcinoma, most don’t progress, worse if younger onset, larger size, high histo grade, small margin width
Ductal Carcinoma In Situ (DCIS): Prognosis
Ipsilateral risk of invasive cancer
Ductal Carcinoma In Situ (DCIS): Treatment/Notes
Often misdiagnosed as inflammatory (e.g. eczema)
Paget’s Disease: Epi/Risk Factors AND Signs/Symptoms/Findings AND Picture
Carcinoma of ducts, nipple
Paget’s Disease: Pathophysiology/Diagnosis
High risk
Paget’s Disease: Prognosis
Ulcerated, scaling nipple lesions
Paget’s Disease: Treatment/Notes
Most common breast Ca
Invasive Ductal Carcinoma: Epi/Risk Factors
Grossly irregular; better prognosis if one of the better differentiated types
Invasive Ductal Carcinoma: Signs/Symptoms/Findings
infiltrative epithelial neoplasm resembing cells lining the ducts/lobules (E-cadherin +)
Invasive Ductal Carcinoma: Pathophysiology/Diagnosis
Prognosis: Medullary, colloid, tubular, mucinous good; inflammatory (erythematous, dermal lymphatics involved) bad
Invasive Ductal Carcinoma: Prognosis AND Treatment/Notes
invasive ductal carcinoma with abundant lyphocytes, mucin, or dilated tubules
medullary, colloid mucinous, or tubular carcinoma; good prognosis
invasive ductal carcinoma with dermal lymphocytic invasion, peau d’orange skin
inflammatory carcinoma; bad prognosis
E-cadherin(-) epithelial cells lining acini and terminal ducts
Lobular Carcinoma In Situ (LCIS): Signs/Symptoms/Findings
bilateral, multifocal small cells in lobules or ducts. Defined by cell type, not location
Lobular Carcinoma In Situ (LCIS): Pathophysiology/Diagnosis
6-9x risk of invasive cancer bilaterally, regardless of original side
Lobular Carcinoma In Situ (LCIS): Prognosis
general risk factor for cancer, but not a precursor, not treated surgically
Lobular Carcinoma In Situ (LCIS): Treatment/Notes
Bulls eye v. Indian file pattern of small cells with scant cytoplasm, decreased E-cadherin expression
Invasive Lobular Carcinoma: Signs/Symptoms/Findings
5-10% of breast cancers, 20% bilateral
Invasive Lobular Carcinoma: Epi
rare, advanced age, BRCA2
male breast cancer
Infiltrating carcinoma resembling cells lining lobules
Invasive Lobular Carcinoma: Pathophysiology/Diagnosis
Tends to be bilateral
Invasive Lobular Carcinoma: Treatment/Notes
40-50% of lumps
Fibrocystic Changes: Epi/Risk Factors
Fibrosis, cysts, apocrine metaplasia, expansion of periductal stroma
Fibrocystic Changes: Signs/Symptoms/Findings AND Picture
Normal part of aging process; increased risk for invasive breast cancer with atypical ductal/lobular hyperplasia, papilloma, adenosis
Fibrocystic Changes: Pathophysiology/Diagnosis AND Prognosis AND Treatment/Notes
Cookie-cutter, spherical appearance of ducts; some but not all features of in situ carcinoma
Atypical Ductal Hyperplasia: Signs/Symptoms/Findings
8-10% risk of progressing t ocarcinoma (ALH>ADH)
Atypical Ductal Hyperplasia: Prognosis
Bimodal: 20s, 40s
Fibroadenoma: Epi/Risk Factors
Lots of stroma, small mobile firm ball-like mass w/sharp edges, increased breast size and tenderness, esp. menses, pregnancy
Fibroadenoma: Signs/Symptoms/Findings
Benign fibroepithelial tumor, most common benign tumor, rarely leads to cancer
Fibroadenoma
Benign papillary neoplasm within duct, bloody discharge
Intraductal Papilloma: Signs/Symptoms/Findings
Can be peripheral or central (nipple), up to 2x risk if peripheral
Intraductal Papilloma: Pathophysiology/Diagnosis
50 yo, cured via excision
Cystosarcoma Phyllodes: Epi/Risk Factors
fibroepithelial neoplasm, Lots of stroma, invaginates into ducts
Cystosarcoma Phyllodes: Signs/Symptoms/Findings AND Picture
p53 inactivating, k-ras activating, EGFR mutation (activates k-ras), chimeric gene of EML4 & ALK
genetic abnormalities in lung cancer
chimeric gene of EML4 and ALK
genetic abnormality in nonsmoking lung cancer
k-ras activating mutation, constituitive activation of a GTPase and all downstream enzymes
genetic abnormality in 25% of adenocarcinoma, often in smokers
asbestos, ionizing radiation, benzypyrene (steel smelting), chloro-methyl ether
lung cancer carcinogens
percent of heavy smokers who get lung cancer
10-20%
risk increases greatly with exposure to multiple carcinogens (synergy)
lung cancer
highest cancer mortality, 2nd highest incidence (decreasing)
lunger cancer
Smoking causes 80-90%
Lung Cancer: Epi/Risk Factors
Cough, dyspnea, SVC syndrome, hoarseness (bad prognosis), clubbing, infxn/pneumonia, etc.
Lung Cancer: Signs/Symptoms/Findings
Dx: transbronchial biopsy, bronchoscopy, CT screening (decreases mortality 20%)
Lung Cancer: Picture
mets to brain, bones, liver, ADRENALS
lung cancer
Precursor lesions: atypical adenomatous hyperplasia, squamous, DIPNECH
Lung Cancer: Pathophysiology/Diagnosis
Screening by low-dose helical CT = 20% mortality reduction; EGFR TKIs helpful (see drug chart)
Lung Cancer: Treatment/Notes
Central, hilar, high grade poorly differentiated tumor
Small Cell Lung Carcinoma (aka Oat Cell): Signs/Symptoms/Findings
Older Age, smoking related
Small Cell Lung Carcinoma Epi
large central tumor w/necrosis, extrapulmonary disease, high N:C, nuclear molding, salt and pepper chromatin, high grade (mitoses and apoptosis), poorly differentiated (few granules)
Small Cell Lung Carcinoma (aka Oat Cell): Pathophysiology/Diagnosis
Only 5% found early
Small Cell Lung Carcinoma (aka Oat Cell): Prognosis
Poor prognosis, associated with SIADH, Cushing’s
Small Cell Lung Carcinoma (aka Oat Cell): Treatment/Notes
cell type: neuroendocrine: neurosecretory cells in airway epithelium which control smooth muscle tone
Carcinoid, Small Cell Lung Carcinoma
central, low grade, salt & pepper chromatin, nests and chords, well-differentiated w/neurosecretory granules
Carcinoid Lung Cancer: Signs/Symptoms/Findings
NE cell hyperplasia, tumorlet invades through airway wall, formation of microscopic nodule
Carcinoid Lung Cancer
Younger, nonsmoker
Carcinoid Lung Cancer Epi
Invasive, peripheral tumor can produce umbilicated lesion, may form glands (goblet cells, clara cells, type 2 pneumocytes)
Adenocarcinoma: Signs/Symptoms/Findings
most common cancer of nonsmokers
Adenocarcinoma: Epi
atypical adenomatous hyperplasia, in situ: ground glass histo, still has some functional alveoli, then forms invasive adenocarcinoma
Adenocarinoma
Disorganized, nested keratinization (pearls), central tumor with squamous differentiation, adhesions and bridges
Squamous Cell Carcinoma: Signs/Symptoms/Findings
squamous dysplasia in metaplastic bronchial cells, nuclear stratification and atypia
Squamous Cell Carcinoma: Signs/Symptoms/Findings
Early stage NSCLC: Surgery (lobectomy vs. wedge), XRT/RF ablation if nonsurgical, adjuvants: Cisplatin + Vinorelbine, Gemcitabine or Pemetrexed
treatment for all non-small cell carcinomas: adeno, squamous, large and giant cell
radiotherapy at site, LN, and brain prophylactic Etoposide and Cisplatin
treatment for all small-cell
Cisplatin and second agent, plus Erlotinib (TK inhibitor, for EGFR mutation) or Crizotinib (TKi for ALK)
treatment for metastatic lung cancer (e.g. of skeleton/brain)
High grade, non-differentiated tumor, poor prognosis, giant cell variant
Large Cell Carcinoma: Signs/Symptoms/Findings
3rd most common cancer, 10% of cancer deaths
Colorectal Cancer: Epi/Risk Factors
over 50, first degree relative, polyps(15-20%), IBD (15-40%), western diet
Colorectal Cancer: Epi/Risk Factors
AK53 leads to loss of APC/beta-catenin leads to k-ras mutation leads to p53 mutation
Colorectal Cancer
Tends to metastasize to lymphatics, liver via portal circulation
Colorectal Cancer: Signs/Symptoms/Findings
65-85% sporadic, 10-25% familial, 6% hereditary syndromes; stage I even if invades muscularis
Colorectal Cancer: Pathophysiology/Diagnosis
1 Cause of Ca death in non-smokers
Colorectal Cancer: Prognosis
Risk factors: developed nations , age, smoking, meat, decreased fiber and exercise, family history, polyps, IBD < HNPCC (~80%) < FAP (~95%)
Colorectal Cancer: Treatment/Notes
AD APC loss, 30% de novo. 1% of CRCs, 100% lifetime risk of CRC
Familial Adenomatous Polyposis (FAP): Epi/Risk Factors
100s-1000s of polyps
Familial Adenomatous Polyposis (FAP): Signs/Symptoms/Findings
blocks beta-catenin, stopping growth and proliferation via Wnt pathway
normal APC gene
APC gene sequencing, k-ras, congential hypertrophy of retinal pigment epithelium
Familial Adenomatous Polyposis (FAP): Pathophysiology/Diagnosis
desmoid tumors (benign), brain, thyroid and duodenal cancers
Familial Adenomatous Polyposis (FAP): Prognosis
Screening: Sigmoidoscopy at 10-12 yo, q2yr after for FAP (start yearly colonoscopy in 20s for Lynch) Tx: Surgery for localized, XRT for rectal; Stg. III/IV: 5-FU, Irinotecan, Oxaliplatin, Bevacizumab, Cetuximab/Panitumumab
Familial Adenomatous Polyposis & Lynch Syndrome
AD, early age (40s)
Lynch Syndrome (HNPCC): Epi/Risk Factors
Multiple primary cancers (endometrium, ovary, GU tract, etc.); more likely to be right-sided, MSIs
Lynch Syndrome (HNPCC): Signs/Symptoms/Findings
lifetime risk of CRC 70%, accelerated polyp to tumor timeline
Lynch Syndrome
Right v. left in CCR
Right bleeds, left obstructs (look for anemia, not blood)
IHC staining for MLH1 and 2 shows decrease, BRAF mutation
Lynch Syndrome (HNPCC): Diagnosis
DNA mismatch repair defects leads to MSIs leads to normal tumor initiation, increased progression
Lynch Syndrome (HNPCC): Pathophysiology
Bethesda guidelines for risk
Lynch Syndrome (HNPCC): Prognosis
precancerous, low surface maturation, enlarged nuclei, low mucin, purple/ble, MIB-1/Ki67 positive (proliferation)
Adenomatous Polyp: Signs/Symptoms/Findings