Mesothelioma Navy Asbestos-Related Diseases & Health Effects 1 — Questions and Answers
Question 1: What is asbestosis?
- Progressive scarring of the lungs caused by inhaled asbestos fibers (Correct answer)
- A type of mesothelioma affecting the pleural lining
- Inflammation of the pericardium caused by asbestos exposure
- A benign condition involving calcification of the pleura
Correct answer: Progressive scarring of the lungs caused by inhaled asbestos fibers
Asbestosis is a chronic fibrotic lung disease caused by the inhalation of asbestos fibers, leading to progressive scarring (fibrosis) of lung tissue that reduces breathing capacity.
Question 2: What is the typical latency period for asbestos-related diseases to develop after initial exposure?
- 1–5 years
- 5–10 years
- 10–20 years
- 20–50 years (Correct answer)
Correct answer: 20–50 years
Asbestos-related diseases typically have a latency period of 20–50 years between initial exposure and symptom onset, which is why many Navy veterans are only now being diagnosed.
Question 3: What are pleural plaques?
- Malignant tumors on the pleural lining
- Areas of fibrosis limited to the visceral pleura only
- Localized areas of fibrous thickening on the parietal pleura (Correct answer)
- Collections of fluid between the lung and chest wall
Correct answer: Localized areas of fibrous thickening on the parietal pleura
Pleural plaques are localized, discrete areas of fibrous thickening on the parietal pleura and are the most common indicator of prior asbestos exposure, though they are benign.
Question 4: Compared to non-exposed non-smokers, smokers who were also exposed to asbestos have approximately what increased risk of developing lung cancer?
- 2 times greater
- 5 times greater
- 50–90 times greater (Correct answer)
- No significant difference
Correct answer: 50–90 times greater
The combination of cigarette smoking and asbestos exposure creates a synergistic effect, increasing lung cancer risk approximately 50–90 times compared to individuals with neither risk factor.
Question 5: What is diffuse pleural thickening (DPT)?
- A pre-cancerous condition limited to the diaphragm
- Extensive fibrous scarring of the visceral pleura that can restrict lung function (Correct answer)
- Calcification of the pericardium caused by asbestos
- A benign cyst found in the pleural space
Correct answer: Extensive fibrous scarring of the visceral pleura that can restrict lung function
Diffuse pleural thickening is widespread fibrous scarring of the visceral pleura that can fuse with the parietal pleura and significantly restrict lung expansion and breathing capacity.
Question 6: Which type of asbestos fiber is most strongly associated with the development of mesothelioma?
- Chrysotile (white asbestos)
- Amosite (brown asbestos)
- Crocidolite (blue asbestos) (Correct answer)
- Anthophyllite
Correct answer: Crocidolite (blue asbestos)
Crocidolite (blue asbestos) is considered the most carcinogenic asbestos fiber type and is most strongly associated with mesothelioma due to its thin, rigid, needle-like fiber structure.
Question 7: What is a pleural effusion in the context of asbestos-related disease?
- Calcification of the pleural lining
- Accumulation of excess fluid in the pleural space (Correct answer)
- Collapse of a lung lobe due to fibrosis
- Hardening of the pleural surface
Correct answer: Accumulation of excess fluid in the pleural space
A pleural effusion is an abnormal accumulation of fluid between the lung and chest wall (pleural space), and is often one of the earliest signs of pleural mesothelioma.
