Mesothelioma Navy Mesothelioma Navy Advanced Practice 5 — Questions and Answers
Question 1: Which asbestos fiber type was most commonly used in U.S. Navy ships and is associated with the highest risk of mesothelioma?
- Crocidolite (blue asbestos) and amosite (brown asbestos) (Correct answer)
- Chrysotile (white asbestos) only
- Tremolite found in talcum powder
- Anthophyllite used in Finnish pipe insulation
Correct answer: Crocidolite (blue asbestos) and amosite (brown asbestos)
Crocidolite and amosite are amphibole fibers with needle-like shapes that penetrate tissue deeply and are most strongly linked to mesothelioma.
Question 2: What is the primary purpose of palliative pleurodesis in a mesothelioma patient?
- To seal the pleural space and prevent recurrent fluid accumulation, relieving breathlessness (Correct answer)
- To cure pleural mesothelioma by destroying tumor cells
- To provide a pathway for repeated chemotherapy delivery
- To reduce the size of tumors before surgery
Correct answer: To seal the pleural space and prevent recurrent fluid accumulation, relieving breathlessness
Pleurodesis uses a chemical irritant to fuse the pleural layers, preventing fluid from re-accumulating and improving the patient's quality of life.
Question 3: Which statute of limitations concern is critical for Navy veterans filing mesothelioma lawsuits?
- Most states require filing within 1 to 3 years of diagnosis or discovery of the asbestos-related illness (Correct answer)
- Veterans have an unlimited window to file because of their military service
- Federal law mandates a 10-year filing window for all asbestos cases
- Lawsuits must be filed before symptoms appear to be valid
Correct answer: Most states require filing within 1 to 3 years of diagnosis or discovery of the asbestos-related illness
State statutes of limitations typically run from the date of diagnosis and vary by state, making prompt legal consultation essential.
Question 4: A radiologist notes 'pleural plaques' on a chest X-ray of a Navy veteran. What do pleural plaques indicate?
- Previous significant asbestos exposure, serving as a marker of exposure history even if the veteran does not have mesothelioma (Correct answer)
- Active mesothelioma tumor growth requiring immediate biopsy
- A benign condition with no relationship to asbestos exposure
- Calcification caused by tuberculosis rather than asbestos
Correct answer: Previous significant asbestos exposure, serving as a marker of exposure history even if the veteran does not have mesothelioma
Pleural plaques are a hallmark of past asbestos exposure and appear on imaging decades after exposure, indicating the lung has been affected.
Question 5: Which VA program provides free healthcare specifically for conditions related to military environmental exposures, including asbestos-related diseases?
- The VA Military Exposures program covering eligible veterans regardless of current income (Correct answer)
- Medicare Advantage plans for veterans over 65
- TRICARE supplemental plans for retired servicemembers
- The Federal Employees Health Benefits program
Correct answer: The VA Military Exposures program covering eligible veterans regardless of current income
The VA provides healthcare for eligible veterans with conditions linked to military environmental exposures such as asbestos, often at no cost.
Question 6: What characteristic pathological finding on biopsy most clearly differentiates mesothelioma from metastatic lung adenocarcinoma?
- Positive calretinin and WT-1 staining with negative TTF-1 immunohistochemistry (Correct answer)
- Presence of squamous cells under light microscopy
- High mitotic rate with central necrosis
- Positive EGFR mutation on molecular testing
Correct answer: Positive calretinin and WT-1 staining with negative TTF-1 immunohistochemistry
Mesothelioma markers calretinin and WT-1 are positive while lung adenocarcinoma marker TTF-1 is negative, distinguishing the two cancers.
Question 7: Which Navy ship type is most frequently mentioned in mesothelioma litigation because of its intensive use of asbestos in confined propulsion spaces?
- Destroyers and destroyer escorts (Correct answer)
- Aircraft carriers
- Patrol boats
- Minesweepers
Correct answer: Destroyers and destroyer escorts
Destroyers and destroyer escorts appear most often in mesothelioma claims because their compact, densely insulated engine spaces exposed engineering crews to extreme fiber concentrations.
Mesothelioma Navy Mesothelioma Navy Advanced Practice 5
Which asbestos fiber type was most commonly used in U.S.
Navy ships and is associated with the highest risk of mesothelioma?