C45.1 Mesothelioma of peritoneum

Name of the Condition

• Mesothelioma of peritoneum

Summary

Mesothelioma of peritoneum is a rare and aggressive cancer that develops in the peritoneum, the thin layer of tissue lining the abdominal cavity. It is strongly associated with asbestos exposure and typically presents decades after initial contact with the substance.

Causes

The primary cause of peritoneal mesothelioma is long-term exposure to asbestos fibers, which can be ingested or inhaled and later migrate to the abdominal cavity. These fibers become trapped in the peritoneum, leading to chronic inflammation and genetic damage over time.

Risk Factors

• Occupational exposure to asbestos (e.g., construction, shipbuilding, mining).
• Living with someone who works with asbestos.
• Older age, as symptoms often appear 20–50 years after exposure.
• Male gender, due to higher rates of occupational exposure in historically male-dominated industries.

Symptoms

• Abdominal swelling, pain, or fluid buildup.
• Unexplained weight loss.
• Fatigue and general malaise.
• Nausea or vomiting.
• Changes in bowel habits.

Diagnosis

Diagnosis involves imaging tests (e.g., CT scans, MRIs) to detect abnormalities, followed by a biopsy of affected peritoneal tissue to confirm cancer cells. Blood tests may also identify biomarkers associated with mesothelioma.

Treatment Options

• Surgery: To remove tumors or reduce fluid buildup.
• Chemotherapy: To kill or slow the growth of cancer cells.
• Radiation therapy: To target and destroy cancer cells.
• Immunotherapy: To boost the immune system's natural ability to fight cancer.

Prognosis and Follow-Up

Prognosis depends on factors like cancer stage, overall health, and treatment response. Regular follow-up care is essential to monitor for recurrence or complications. Survival rates vary, and early detection may improve outcomes.

Complications

• Bowel obstruction.
• Peritoneal fluid buildup (ascites).
• Metastasis to other organs.
• Malnutrition due to digestive issues.

Lifestyle & Prevention

• Avoid asbestos exposure in occupational or environmental settings.
• Use protective equipment if working with asbestos.
• Maintain a healthy diet and regular exercise to support overall health.

When to Seek Professional Help

Seek medical attention if you experience persistent abdominal pain, swelling, unexplained weight loss, or other concerning symptoms, especially if you have a history of asbestos exposure.

Tips for Medical Coders

Document the specific site (peritoneum) and any relevant details about asbestos exposure or occupational history. Ensure the code C45.1 is used for peritoneal mesothelioma, distinguishing it from other mesothelioma sites. Include clinical documentation supporting the diagnosis for accurate coding.