B27 Infectious mononucleosis

Name of the Condition

• Infectious mononucleosis

Summary

Infectious mononucleosis is a viral infection commonly caused by the Epstein-Barr virus (EBV). It is characterized by symptoms such as fever, sore throat, and swollen lymph nodes. The condition primarily affects adolescents and young adults but can occur in other age groups. Most cases resolve with supportive care, though complications may arise in some individuals.

Causes

Infectious mononucleosis is most often caused by the Epstein-Barr virus (EBV), a member of the herpesvirus family. The virus spreads through saliva, which can occur through kissing, sharing utensils or beverages, or other close contact. Less commonly, other viruses such as cytomegalovirus (CMV) or toxoplasma may cause similar symptoms.

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
• Enlarged spleen or liver (in some cases)
• Rash (less common)

Diagnosis

Diagnosis typically involves a combination of clinical evaluation and laboratory testing. A physical exam may reveal swollen lymph nodes or an enlarged spleen. Blood tests, such as the Monospot test or EBV antibody tests, help confirm infection. A complete blood count may show atypical lymphocytes, supporting the diagnosis.

Treatment Options

There is no specific antiviral treatment for infectious mononucleosis. Management focuses on relieving symptoms and supporting recovery. This includes rest, adequate hydration, and over-the-counter pain relievers or fever reducers. Severe cases or complications may require additional medical intervention.

Prognosis and Follow-Up

Most individuals recover fully within a few weeks to a month. Fatigue may persist for several weeks or months. Follow-up care is generally supportive, with monitoring for complications like splenic rupture or airway obstruction. Return to normal activities should be gradual, especially for those with prolonged fatigue.

Complications

• Splenic rupture (rare but serious)
• Airway obstruction due to severe throat swelling
• Hepatitis or jaundice
• Neurological complications (e.g., meningitis, encephalitis)
• Hemolytic anemia or thrombocytopenia

Lifestyle & Prevention

• Avoid sharing personal items like utensils, glasses, or toothbrushes.
• Practice good hand hygiene to reduce transmission.
• Rest adequately during acute illness to support recovery.
• Avoid contact sports or strenuous activity if the spleen is enlarged to prevent rupture.

When to Seek Professional Help

Seek medical attention if symptoms worsen or persist beyond two weeks, or if there is severe throat pain, difficulty breathing or swallowing, sharp abdominal pain (possible spleen rupture), or signs of jaundice. Immediate care is needed for neurological symptoms like confusion or seizures.

Tips for Medical Coders

Document the clinical presentation, including key symptoms (e.g., fever, sore throat, lymphadenopathy) and any confirmed or suspected cause (e.g., EBV). Note the absence or presence of complications, as this may impact coding specificity. Ensure documentation supports the diagnosis and aligns with the ICD-10-CM guidelines for B27.