Lecture 8 (Lung CA)-Exam 3 Flashcards
Pulmonary Nodule
* What size is a solitary nodule? What size is a mass?
* What size is suspicious, what size requires a work up and what size is malgnant unless proven otherwise? ⭐️
* What is the shape?
* usually incidental findings in who?
* Can be what?
* Most likely bengin in who?
* Likeihood of malignacy increas with what?
- Solitary nodule <3 cm, >3 cm mass
- > 8mm (0.8cm) is suspicious, generally 1cm or greater requires at least some work-up, >3cm is malignant unless proven otherwise ⭐️
- Rounded opacity on CT scan, outlined by normal lung, not associated with infiltrate, atelectasis, or adenopathy
- Usually, incidental finding in pts >=35 without symptoms
- Can be malignant or benign
- Most likely benign with age <30
- Likelihood of malignancy increases with age and if smoker
under slide: Subcentimeter nodules are usually below the threshold of PET scan recognition.
Pulmonary Nodule: benign causes
* What are the infectious causes?
* What is the benign tumor?
* What is vascular? What do you NOT do?
* What are some other causes?
- Infectious: infectious granulomas (TB) cause 80%; endemic fungi (histoplasmosis, coccidioidomycosis) and mycobacteria (TB or non-TB), most common. Less common, abscess-forming bacteria (Staph)
- Benign tumors: pulmonary hamartomas 10%.
- Vascular: Pulmonary arteriovenous malformations (PAVMs)->Do not biopsy (dt bleeding, so do CTa instead)
- Other: inflammatory; granulomatosis RA, sarcoidosis, bronchogenic cyst
Pulmonary Nodule- Malignant causes:
* What is the primary lung cancer?
* What is the metastatic cancers?
* What are the carinoid tumors?
- Primary lung cancer: Adenocarcinoma most common
- Metastatic cancer: Most common malignant melanoma, sarcoma and carcinomas of the bronchus, colon, breast, kidney and testicle.
- Carcinoid tumors: Although most endobronchial, approx. 20% present as a peripheral, well-circumscribed pulmonary nodule
Solitary Nodules-Goals of evaluation
* Identify and resect what?
* Aviod what?
* Most bengin nodules are what?
* What accounts for under 5% of solitary nodules?
Identify & resect malignant tumors
Avoid invasive procedures in benign nodules
* Most benign nodules are infectious granulomas
* Hamartomas (benign neoplasms) only account for < 5% of solitary nodules
Solitary nodules:
* What are the Factors suggesting malignancy & need for resection?
- Cigarette smoking
- Age > 35
- Relatively large(> 2 cm) lesion
- Lack of calcification
- Chest symptoms
- Growth of lesion compared to old CXR
- Prior malignancy history increases the risk
Evaluation of nodule
* What is inital evaluation?
* Likeihood determines what?
* How do you asses risk?
* Often what?
- Initial evaluation uses clinical and radiographic features to determine likelihood of malignancy.
- Likelihood determines surveillance with CT or biopsy
- Assessing risk either clinically or predictive models, calculators
- Often intuitive
Evaluation of nodule
* What are the age associated risks?
* What are the other risk factors?
Age associated risks:
* 35 to 39 years: 3 percent
* 40 to 49 years: 15 percent
* 50 to 59: 43 percent
* ≥60 years: >50 percent
Other risk factors considered:
* Smoking
* Family history
* Female
* Emphysema
* Prior malignancy
* Asbestos
Pulmonary Nodule Characteristics
* What should you review?
* What is likely infection?
* Growth: what suggests benign? What is growth defined as?
* What are the size and malignancy rates (4)
Pulmonary Nodule Characteristics
* What is a characterisitcs of a benign process?
* What characterisitic suggests malignancy?
* What is highly associated malignancy on CT
* What type of pattern is in bengin nodules?
* What type of pattern is in malignant nodules?
* What types of walls are more likely malignant?
Evaluation of Pulmonary Nodules
* What are low probability patients? What do you need to do for work up?
* What are intermediate probability patients? What do you need to do for work up?
* What are high probability patients? What do you need to do for work up?
- Low probability patients: age under 30, lesions stable for more than 2 years, characteristic pattern of benign calcification -> watchful waiting with serial CT scans or CXR
- Intermediate probability patients -> biopsy via bronchoscopy or CT guided biopsy
- High probability patients -> surgical resection (if surgical risk is acceptable).
Lung Cancer
* Leading cause of what?
* What is the genetic predisposition?
* Most people are how old at dx?
* Combined relative 5-year survival rate for all stages is what?
- Leading cause of cancer deaths in both men (>40yo) and women (>60yo) in US-> Surpassed breast CA in 1987
- Genetic Predisposition: ATM, CXCR2, CYP1A1, CYP2E1, ERCC1, ERCC2, FGFR4, SOD2, TERT, and TP53
- Most people over 65 at time of diagnosis in US; average 70, unusual under the age of 40
- Combined relative 5-year survival rate for all stages is currently 19%
Risk Factors of lung cancer:
* What is the primiary risk factor of cancer? ⭐️⭐️⭐️⭐️
* What are some other ones?
KNOW CIGSSSSSS
Risk factors of lung cancer:
* What are the comorbid conditions?
* What are the infections?
* What is the diet?
- Comorbid conditions: COPD, Alpha1-antitrypsin
- Infections: HPV, EB virus, CMV, HIV, chlamydia pneumonia
- Diet: red meat, dairy products, saturated fats, and lipids have been suggested to increase the risk for lung cancer.
Uncertain or unproven effect on lung cancer risk: Marijuana
* Marijuana smoke contains what?
* Inhaled deeply and held for a long time, gives what?
* Due to illegal in many places, may not be possible to what?
Uncertain or unproven effect on lung cancer risk:
* What is a cig alternative?
Uncertain or unproven effect on lung cancer risk:
* What type of powder ? why?
⭐️⭐️⭐️
What is the most common independ risk factor for lung CA after smoking?
COPD
* Most common independent risk factor for Lung CA after smoking
* Most COPD from smoking; however, independent risk factor
* 2-to-5-fold increase in risk of lung CA
⭐️
Pul fibrosis increases the risk of lung cancer by how much?
Pulmonary fibrosis
* Fivefold increase in lung CA in pts with IPF; independent from smoking
* (more people have COPD for statistical comparison
What is the median age of a patient being dx with lung cancer?
Five Main Histologic Categories of Bronchogenic Carcinoma
- Squamous cell
- Adenocarcinoma
- Adenocarcinoma in situ (previously bronchioalveolar cell carcinoma)
- Large cell carcinoma
- Small cell carcinoma
⭐️⭐️⭐️
For purposes of staging and treatment, bronchogenic carcinomas are divided into two categories, what are they?
Small cell lung cancer (SCLC)
Non-small cell lung cancer (NSCLC)
* Squamous cell, adenocarcinoma, adenocarcinoma in situ, Large cell carcinoma
* 80-85% of lung CA is NSCLC
Adenocarcinoma
* Common or rare?
* Arises from what?
* How does it present in the lungs?⭐️
* What is Adenocarcinoma in situ?
Adenocarcinoma
* Who does it often occur more in?
* Said to occur in association with what?
* Grows fast or slow? What is the prognosis?
- Occurs more often in non-smokers & in smokers who have quit.
- Said to occur in association with old trauma, scars, TB & infarctions
- Grows more slowly than SCC or undifferentiated carcinomas & tends to have a better prognosis
Bronchioalveolar Carcinoma
* Varient of what?
* What does it present as?
* What is in large ares of the lung parenchyma?
* Better or worst prognosis?
- Variant of adenocarcinoma, arising from epithelium of distal bronchioles.
- Clinical picture & imaging mimic pneumonia
- Intra-alveolar spreading, infiltrates large areas of lung parenchyma
- Better prognosis than most other primary lung cancers.
Squamous Cell Carcinoma (Epidermoid cell)
* Arises from what?
* Most closely associated with what? ⭐️
* Usually presents how? ⭐️
- Arise from the bronchial epithelium and often present as intraluminal masses
- Most closely associated with cigarette smoking in men
- Usually centrally located and can present with hemoptysis
23% of cases
Epidermoid Cancer Obstructing R Bronchus
* Frequently silent until it causes what?
* Amendable to early detection (sputum) due to what?
- Frequently silent until it causes narrowing of bronchi, collapse of parenchyma with obstruction, & consequent pneumonia distal to obstruction
- Amendable to early detection (sputum) due to tendency to originate in central bronchi.
Large Cell Carcinoma (Anaplastic)
* What is that?
* Typically what? Good or bad prognosis?
* Present how?
* What make up about 14% of cases?
Small Cell Carcinoma
* Almost always associated with what? ⭐️⭐️⭐️
* Tumors of bronchial origin that typically begin how?
* Aggressive cancers that often involves what?
* Often associated with what?
* More amenable to what?
do biospy-> ID cancer type-> pick therapy type
Histological Classification/Clinical Utility
* Small cell versus non-small cell types major determinant of what?
* What is the difference between small cell and non-small on?
* Epidermoid amendable to what? Why?
* Epidermoid & large cell cavitate in how many patients?
* Adenocarcinoma & large cell tend to originate how?
Clinical Manifestations of Lung cancer
* Over half of patients diagnosed with lung cancer present with what?
* Majority present with signs and symptoms or laboratory abnormalities that can be attributed to what?
* Hx of?
- Over half of patients diagnosed with lung cancer present with locally advanced or metastatic disease at time of diagnosis
- Majority present with signs and symptoms or laboratory abnormalities that can be attributed to the primary lesion, local tumor growth, invasion or obstruction of adjacent structures
- History of chronic cough, hemoptysis, wheeze, stridor, dyspnea, or postobstructive pneumonia
Physical Exam of lung cancer
* Lung:
* HEENT:
* Fundi:
* Cardiac:
* Abdomen:
* Lymph
Signs and Symptoms on Presentation
* What happens to the pt’s weight?
* New what?
* Cough?
* What type of pain?
- Anorexia, weight loss in 55-90%
- New cough or change in chronic cough 60%
- Hemoptysis 6-31%
- Pain* 25-40%
* Nonspecific chest pain
* Pain from bony metastases to the vertebrae, ribs, or pelvis
* Remember this with pts presenting with bony pain and no trauma
Signs and Symptoms on Presentation of lung cancer:
* Local spread may cause what?
What are these?
- Right: pleural effusion
- left: pericardial effusion
Superior Vena Cava Syndrome
* What is this?
* What are the sxs?
* Treatable if what?
- Blood flow through the SVC is blocked or compressed
- Face/neck swelling, distended neck veins, cough, dyspnea, orthopnea, upper extremity swelling, distended chest vein collaterals, and conjunctival suffusion.
- Treatable if able to relieve compression
What is this?
SVC Syndrome
Symptoms metastaes to liver and brain?
What are the primary sites of metastasis?
- Liver
- Bone
- Adrenal
- Brain