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28 Cards in this Set
- Front
- Back
Lung cancer is currently the most commonly diagnosed major cancer in the world. 90-95% of pulmonary neoplasms are _______
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carcinomas
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Since the 1990s lung cancer incidence and mortality has decreased in ____.
Since 1987 more women have died each year from lung cancer than _____ cancer |
men
breast |
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_ year survival has increased from 34% (1975) to 41% (2007), from advances in surgical technique.
But _ year survival for all stages is only 16%. |
1
5 |
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Tobacco smokers have a ___ greater risk than nonsmokers. Heavy (40 cigarettes/day/years) have a __x increased risk.
Which gender is more susceptible to cigarette carcingoens? Smoking cessation for __ years reduces risk but not back to baseline |
10x
60x women 10 |
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linear correlation between intensity of cigarette exposure and the appearance of epithelial changes:
Squamous ______ -> squamous _______-> carcinoma |
metaplasia
dysplasia |
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Lung tumors of smoker frequently contain G:C>T:A mutations in the __ gene thought to be caused by ______, a carcinogen in tobacco smoke.
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p53
benzopyrene |
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What are the 5 dominant oncogenes frequently involved in lung cancer?
c-___ k___ e___ c-___ c-___ |
c-myc
kras egfr* mutated in non-smoking women c-met c-kit |
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Tumor suppressor genes frequently inactivated include:
P__, RB1, p__, and multiple loci on 3p |
p53
RB1 p16 multiple loci on 3p |
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Carcinomas can be divided into two broad groups (Small cell, and Non-small cell).
C-KIT, MYCN, MYCL, p53, 3p, RB, bcl-2 (Small cell) EGFR, KRAS, p53, p16 (Non-small cell) How can you remember non-small cell? |
EGFR and p53 are easy to remember... p53 is in both. Then the other p one (p16) and a weird one KRAS
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__ deletions are frequently seen in non-cancerous epithelium of smokers
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3p deletions
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25% of lung cancer occurs in non-smokers most commonly _____ with mutations in ____
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women
EGFR |
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There are three types of precursor lesions recognized:
_______ dysplasia and carcinoma in-situ Atypical _______ hyperplasia Diffuse idiopathic pulmonary _______ cell hyperplasia |
squamous
adenomatous neuroendocrine |
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Which tumor has resulting horner's syndrome from axillary nerve plexus invasion?
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Pancoast tumor - ptosis, miosis, anhidrosis, sympathetic chain invasion.
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What syndrome results in arms not draining when raised, edema and rubor seen in skin, and varicosities in the abdomen?
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Superior vena cava syndrome - tumor is squishing the SVC
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What is the best way to diagnosis/screen for lung cancer?
What are two poor ways? |
Superclavicular node biopsy or biopsy with endoscopy, fine needle, open.
Chest x-ray or sputum exfoliative cytology = too late, usually not resectable at the point of detection |
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Which type of carcinoma is more centrally located and necrosis with cavitation is common? Forms keratin pearls histologically
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Squamous cell carcinoma - dysplasia and hyperplasia of squamous cells
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Which type of carcinoma is more peripheral, puckering appearance grossly, brushing comes out like a bunch of grapes, prominenet NUCLEOLI
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Adenocarcinoma - most common
mucus and gland formation histologically |
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Which type of carcinoma has neurosecretory granules, positive for IP stain, little cytoplasm in cells, blue appearance typically, growing in large, undefined mass
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Undifferentiated carcinoma: Small cell type
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Which type of carcinoma really doesn't have any clue twoards origin, large mass of cells
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Undifferentiated carcinoma: large cell type ("garbage dx")
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Which type of carcinoma has better prognosis than other forms when found early, percolates along pre-existing alveolar network which eventually become necrotic, not a large mass
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Bronchioloalveolar cell carcinoma
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Which type of carcinoma is rare, more common in GI tract, secretes hormones, centrally located typically, grows in "nests" or "balls of cells"
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Carcinoid carcinoma
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Which type of carcinoma is rare, non-malignant, normal tissue in abnormal location?
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Hamartoma
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Which type of carcinoma can cause overproduction of steroids due to ACTH secretion. Also can cause Kushing syndrome. Or peeing all the time from too much ADH
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Small cell carcinoma (neurosecretory granules!)
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Which type of carcinoma pumps out a calcitonin like secretion causing hypercalcemia?
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Squamous cell carcinoma
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Surgery:
Less than __% resectable If resectable, up to 50% live five years What type of carcinoma rarely resectable (usually metastatic widely) |
10
small cell |
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What tx is most effective for small cell?
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Chemo - rarely curable, 20% cure if only one node area involved
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Mutation of what gene makes 10% of patients with non-small cell Ca very susceptible to chemoRx response to gefitanib?
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Epidermal growth factor receptor (EGFR)
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Which carcinoma has the worst prognosis?
Best? Which gender has it worse and why? |
Small cell with no Rx = 1.5-3 mos; with Rx = 10-12 mos
For bronchioloalveolar Ca: 5 year survival = 25% (better prognosis); bronchial carcinoids = 50-95% / 5yrs Differences in women (more rapidly lethal): Have decreased DNA repair from point mutations that occur and build up in genome K-ras mutations more common |