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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 _______
carcinomas
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
_ 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
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
linear correlation between intensity of cigarette exposure and the appearance of epithelial changes:
Squamous ______ -> squamous _______-> carcinoma
metaplasia
dysplasia
Lung tumors of smoker frequently contain G:C>T:A mutations in the __ gene thought to be caused by ______, a carcinogen in tobacco smoke.
p53
benzopyrene
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
Tumor suppressor genes frequently inactivated include:
P__, RB1, p__, and multiple loci on 3p
p53
RB1
p16
multiple loci on 3p
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
__ deletions are frequently seen in non-cancerous epithelium of smokers
3p deletions
25% of lung cancer occurs in non-smokers most commonly _____ with mutations in ____
women
EGFR
There are three types of precursor lesions recognized:
_______ dysplasia and carcinoma in-situ
Atypical _______ hyperplasia
Diffuse idiopathic pulmonary _______ cell hyperplasia
squamous
adenomatous
neuroendocrine
Which tumor has resulting horner's syndrome from axillary nerve plexus invasion?
Pancoast tumor - ptosis, miosis, anhidrosis, sympathetic chain invasion.
What syndrome results in arms not draining when raised, edema and rubor seen in skin, and varicosities in the abdomen?
Superior vena cava syndrome - tumor is squishing the SVC
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
Which type of carcinoma is more centrally located and necrosis with cavitation is common? Forms keratin pearls histologically
Squamous cell carcinoma - dysplasia and hyperplasia of squamous cells
Which type of carcinoma is more peripheral, puckering appearance grossly, brushing comes out like a bunch of grapes, prominenet NUCLEOLI
Adenocarcinoma - most common
mucus and gland formation histologically
Which type of carcinoma has neurosecretory granules, positive for IP stain, little cytoplasm in cells, blue appearance typically, growing in large, undefined mass
Undifferentiated carcinoma: Small cell type
Which type of carcinoma really doesn't have any clue twoards origin, large mass of cells
Undifferentiated carcinoma: large cell type ("garbage dx")
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
Bronchioloalveolar cell carcinoma
Which type of carcinoma is rare, more common in GI tract, secretes hormones, centrally located typically, grows in "nests" or "balls of cells"
Carcinoid carcinoma
Which type of carcinoma is rare, non-malignant, normal tissue in abnormal location?
Hamartoma
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
Small cell carcinoma (neurosecretory granules!)
Which type of carcinoma pumps out a calcitonin like secretion causing hypercalcemia?
Squamous cell carcinoma
Surgery:
Less than __% resectable
If resectable, up to 50% live five years
What type of carcinoma rarely resectable (usually metastatic widely)
10

small cell
What tx is most effective for small cell?
Chemo - rarely curable, 20% cure if only one node area involved
Mutation of what gene makes 10% of patients with non-small cell Ca very susceptible to chemoRx response to gefitanib?
Epidermal growth factor receptor (EGFR)
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