B27.12 Cytomegaloviral mononucleosis with meningitis

Name of the Condition

• Cytomegaloviral mononucleosis with meningitis

Summary

Cytomegaloviral mononucleosis with meningitis is a viral infection caused by the cytomegalovirus (CMV) that presents with symptoms of mononucleosis and involves inflammation of the meninges. This condition combines the systemic effects of CMV infection with neurological manifestations, potentially leading to symptoms related to meningeal irritation. Most cases are managed with supportive care, though antiviral therapy may be considered in severe or immunocompromised individuals.

Causes

Cytomegaloviral mononucleosis with meningitis is caused by infection with the cytomegalovirus, a member of the herpesvirus family. The virus spreads through bodily fluids such as saliva, blood, urine, semen, and breast milk. Transmission typically occurs through close contact with an infected person or exposure to contaminated materials. The meningitis component may arise from direct viral invasion of the meninges or an immune-mediated response to the infection.

Risk Factors

• Having a weakened immune system (e.g., due to HIV/AIDS, chemotherapy, or organ transplantation)
• Being in close contact with young children who shed the virus
• Working in healthcare or childcare settings
• Pre-existing neurological conditions that may increase susceptibility to meningeal involvement

Symptoms

• Fever
• Fatigue
• Sore throat
• Swollen lymph nodes
• Muscle aches
• Headache
• Neck stiffness
• Sensitivity to light
• Altered mental status

Diagnosis

Diagnosis typically involves a combination of clinical evaluation and laboratory testing. A physical exam may reveal signs of meningeal irritation, such as neck stiffness or photophobia. Blood tests can detect CMV antibodies or DNA, and cerebrospinal fluid analysis may show elevated white blood cells, protein levels, or viral presence. Imaging studies like MRI or CT scans may be used to rule out other causes of neurological symptoms.

Treatment Options

Treatment focuses on managing symptoms and supporting the immune system. Antiviral medications, such as ganciclovir or valganciclovir, may be prescribed in severe cases or for immunocompromised patients. Supportive care includes rest, hydration, and pain relief for symptoms like fever or headache. Corticosteroids are not typically used unless there is significant inflammation or edema.

Prognosis and Follow-Up

Most individuals with cytomegaloviral mononucleosis with meningitis recover fully with appropriate care. Recovery time varies, but symptoms often improve within weeks. Follow-up care may include monitoring for recurrence of symptoms or complications, especially in immunocompromised patients. Regular check-ups with a healthcare provider are recommended to ensure complete resolution.

Complications

• Persistent neurological symptoms
• Hearing loss
• Cognitive impairment
• Seizures
• Meningeal scarring
• Increased risk of other infections due to weakened immunity

Lifestyle & Prevention

• Practice good hygiene, such as frequent handwashing, to reduce exposure to the virus.
• Avoid close contact with individuals who have active CMV infections, especially if you have a weakened immune system.
• Ensure proper nutrition and rest to support immune function.
• Discuss vaccination or preventive measures with a healthcare provider if you are at high risk (e.g., pregnant or immunocompromised).

When to Seek Professional Help

Seek immediate medical attention if you experience severe headache, neck stiffness, confusion, or other signs of meningitis. Contact a healthcare provider if symptoms worsen or do not improve after a few days, or if you have a weakened immune system and suspect CMV infection.

Tips for Medical Coders

When coding for cytomegaloviral mononucleosis with meningitis (B27.12), ensure documentation supports both the mononucleosis and meningitis components. Verify that the diagnosis includes clinical findings consistent with meningitis, such as meningeal irritation or cerebrospinal fluid abnormalities. Confirm the underlying CMV infection is documented, as this is essential for accurate code assignment.