Pulmonary neoplasms Flashcards
Characteristics of SPN
- Well circumscribed
- Isolated
- Round opacity
- Surrounded by normal lung
- ≤ 3 cm
What are the most common causes of SPN?
- Bronchogenic carcinoma
- Metastatic lesion
- Granuloma
- Calcification
What is the clinical presentation of SPN?
Usually asx
Found incidentally on CXR
What are RFs for SPN?
- Older age
- Smoking
- Recent travel
- Recreational activities
- Occupational
How do you evaluate imaging for SPN?
Compare to old films, looking for rate of growth
What can be seen on CXR?
- Cavitation
- Calcification (dense calcification = benign, less calcification = malignancy)
- Hamartoma = “popcorn”
What are concerning features for malignancy on CT?
- Spiculated margins
- Peripheral halo
- Density
What type of people are considered low risk for malignancy?
- Age < 30
- Stable lesion ≥ 2 years
- Benign calcification pattern
SPN: How do you manage low risk pts?
Watchful waiting
SPN: How do you manage intermediate risk pts?
- Biopsy
- PET
SPN: How do you manage high risk pts?
Resection
What are the most common types of lung CA?
- Adenocarcinoma
- Squamous cell carcinoma
What are the 2 main groups of lung CA?
- Non-small cell
2. Small cell
What are RFs for lung CA?
- Tobacco smoke #1
- Exposure to radon, asbestos, or other carcinogens
- Pollution
- Arsenic drinking H2O
- Previous radiation to chest
- Personal or family hx
What group of cancer is most common?
Non-small cell
What categories does non-small cell cancer include?
- Adenocarcinoma (most common)
- Adenosquamous
- Squamous cell
- Large cell
What are characteristics of adenocarcinoma?
- Associated w/ smoking, but most common type in non-smokers
- Mucus gland origin
- Located peripherally
- Slow growing
What are characteristics of squamous cell?
- Bronchial epithelium origin
- Associated w/ hypercalcemia
- Metastasize later on
- Central necrosis
What are characteristics of large cell?
- Agressive, rapid
- Peripheral w/ prominent necrosis (but can be central)
What are characteristics of small cell?
- Bronchial origin
- Begin centrally, infiltrate submucosally –> narrowing of bronchus
- Aggressive, poor px
- Distant metastasis at time of dx
Describe bronchial carcinoid tumors
Pedunculated or sessile growths in central bronchi
What are bronchial carcinoid tumors derived from?
Neuroendocrine cells
What is the clinical presentation of bronchial carcinoid tumors?
- Hemoptysis, cough, focal wheezing, recurrent pneumonia
- Grow slowly & rarely metastasize
What sx indicate carcinoid syndrome?
Flushing, diarrhea, wheezing, hypotension