B27.02 Gammaherpesviral mononucleosis with meningitis

Name of the Condition

• Gammaherpesviral mononucleosis with meningitis

Summary

Gammaherpesviral mononucleosis with meningitis is a viral infection caused by gammaherpesviruses, most commonly Epstein-Barr virus (EBV), that combines the classic symptoms of mononucleosis with inflammation of the meninges. The condition involves fever, sore throat, lymphadenopathy, and neurological signs of meningitis, such as headache, neck stiffness, or photophobia. It primarily affects adolescents and young adults but can occur in other age groups. Management focuses on treating the viral infection and addressing meningitis symptoms, with outcomes depending on the severity of neurological involvement.

Causes

Gammaherpesviral mononucleosis with meningitis is caused by infection with viruses in the gammaherpesvirus family, with Epstein-Barr virus (EBV) being the most frequent cause. The virus spreads through saliva, which can occur through kissing, sharing utensils or beverages, or other close contact. The meningitis component may result from direct viral invasion of the meninges, immune-mediated inflammation, or both. Less commonly, other gammaherpesviruses may cause similar symptoms with associated meningeal involvement.

Risk Factors

• Adolescents and young adults, particularly those in close-contact environments like college dormitories.
• Exposure to EBV, especially in settings with frequent interpersonal contact.
• Weakened immune system due to conditions like HIV/AIDS or immunosuppressive therapy.

Symptoms

• Persistent fatigue
• Fever
• Sore throat, often severe
• Swollen lymph nodes in the neck and armpits
• Headache
• Neck stiffness
• Photophobia (sensitivity to light)
• Enlarged spleen or liver (in some cases)

Diagnosis

Diagnosis typically involves a combination of clinical evaluation, laboratory tests, and imaging. Clinical assessment focuses on symptoms like fever, sore throat, lymphadenopathy, and neurological signs of meningitis. Laboratory tests may include a complete blood count (CBC) to check for atypical lymphocytes, serologic testing for EBV antibodies (e.g., heterophile antibody test), and cerebrospinal fluid (CSF) analysis to detect viral DNA or inflammatory changes. Imaging, such as a CT or MRI of the brain, may be used to rule out other causes of meningitis.

Treatment Options

Treatment is primarily supportive, focusing on symptom relief and managing complications. Rest, hydration, and over-the-counter pain relievers (e.g., acetaminophen or ibuprofen) may help alleviate fever and sore throat. Antiviral medications are not typically used for uncomplicated cases but may be considered in severe or immunocompromised individuals. Meningitis-specific treatments, such as corticosteroids or antiviral therapy, may be necessary if inflammation is severe or neurological symptoms persist.

Prognosis and Follow-Up

Most individuals recover fully with supportive care, though recovery may take several weeks. Neurological symptoms usually improve as the viral infection resolves, but some may experience lingering effects. Follow-up care may include monitoring for complications, such as persistent fatigue or neurological issues, and ensuring complete resolution of symptoms. Immunocompromised patients may require closer observation due to a higher risk of severe disease.

Complications

• Meningitis-related complications, such as seizures or altered mental status.
• Prolonged fatigue or post-viral syndrome.
• Enlarged spleen rupture (rare but serious).
• Neurological sequelae, such as persistent headaches or cognitive changes.

Lifestyle & Prevention

• Avoid sharing personal items like utensils, beverages, or toothbrushes to reduce EBV transmission.
• Practice good hand hygiene, especially after contact with saliva.
• Get adequate rest and stay hydrated during illness to support recovery.
• Immunocompromised individuals should take precautions to avoid exposure to EBV.

When to Seek Professional Help

Seek medical attention if symptoms worsen or new neurological signs appear, such as severe headache, neck stiffness, confusion, or sensitivity to light. Immediate care is needed for signs of spleen rupture, including sudden severe abdominal pain or shoulder pain, or if breathing difficulties occur.

Tips for Medical Coders

When coding for gammaherpesviral mononucleosis with meningitis, use ICD-10-CM code B27.02. Ensure documentation clearly specifies the presence of meningitis as a complication of the mononucleosis. Verify that the diagnosis aligns with clinical findings, such as CSF analysis or neurological symptoms, to support accurate coding. Avoid using this code for uncomplicated mononucleosis or other viral meningitis without gammaherpesviral involvement.