Lung Tumors Flashcards
What is lung cancer
tumors that originate from the epithelium of the respiratory tract
Lung cancer is AKA
bronchogenic carcinoma
How many people are diagnosed - how many new cases per year
226, 160
How many people are diagnosed - lung cancer is the most common fatal neoplasia in both sexes 50-65 yrs old - T or F
TRUE
How many deaths in 2010 from lung cancer
157,300
female vs. male lung cancer incidence throughout time
Used to have increase in females
2000-2008 see a dec in males and females stayed about the same
Highest incidence in what sates
arkansas, delaware, indiana, kentucky, louisiane, maine, mississippi, missouri, oklahoma, rhode island, tennessee, west virginia
Incidence rates by race - mos prevalent in
blacks have higher incidence primarily in males
female - blacks and whites are about the same
Hispanics have lower compared to overall population
What causes lung cancer
Environmental disease (secondhand smoke, radon, hydrocarbons...) Active smoking 90% of cases Occupational exposure (asbestos) Current studies indicate genetics make play role
Are some lung cancers worse than others?
YES
WHO classification is based on
cell type
WHO classification includes
Epidermoid (squamous) carcinoma (17%)
Small cell carcinoma including oat cell (25%)
Adenocarcinoma (40%) - they are glandular carcinomas and can produce substances
Large cell carcinoma (15%)
Other way of classifying lung tumors
Small cell lung cancer (20%)
Non small cell lung cancer (80%) - this includes squamous cell, adenocarcinoma, large cell carcinoma
Squamous cell carcinoma - closely correlated to
cigarette smoking
Squamous cell carcinoma - usually located where
centrally located near the hilus - projecting into the bronchi
Squamous cell carcinoma - tends to spread by
direct extension
LATE METASTASIS
Squamous cell carcinoma - initial presentation
shortness of breath early on because the tumor is in some of the bronchi so air exchange is difficult
Adenocarcinoma - located where
peripherally - smaller lesions
Adenocarcinoma - smoking
Not associated with smoking
Most of the cancers in non-smokers are adenocarcinomas
Adenocarcinomas tend to invade
blood and lymph vessels leading to early metastasis
Adenocarcinomas - because the tissue is sometimes functional tissue there might be
different hormones produced by the tumor itself
Large cell carcinoma - highly ___ and ___
highly undifferentiated and anaplastic
If you were looking at this cell it would not look like any parent cell - it would be hard to classify and say what type of cell it was
Large cell carcinomma - tends to develop where
in the periphery