What is Marshall syndrome - PFAPA

Marshall syndrome, more commonly known as PFAPA syndrome (Periodic Fever, Aphthous Stomatitis, Pharyngitis, and Adenitis), is a chronic inflammatory disorder characterized by recurring episodes of high fever accompanied by mouth sores, sore throat, and swollen lymph nodes. While it is a pediatric condition that typically resolves on its own by late childhood, it can significantly impact a child's quality of life during active flares.

What are the symptoms and body systems affected by Marshall syndrome (PFAPA)?

Marshall syndrome (PFAPA) primarily affects the immune system, leading to periodic systemic inflammation. During a flare, which typically lasts 3 to 6 days, a child will experience a sudden onset of high fever, often exceeding 39°C (102.2°F). The defining clinical triad accompanying the fever includes: 1) Aphthous stomatitis (painful mouth ulcers), 2) Pharyngitis (severe sore throat with redness or white patches), and 3) Cervical adenitis (swollen, tender lymph nodes in the neck). Between these episodes, children with Marshall syndrome (PFAPA) are typically completely asymptomatic and thrive normally, showing no signs of growth failure or developmental delays.

Who is typically affected by Marshall syndrome (PFAPA)?

Marshall syndrome (PFAPA) is most commonly diagnosed in early childhood, typically between the ages of 2 and 5 years. While the exact global prevalence remains unknown because the condition is often underdiagnosed or misdiagnosed as recurrent viral infections, it is considered the most common cause of periodic fever in children. There is a slight predominance in males, and while it has been reported across various ethnic and geographic backgrounds, more research is needed to determine if there are specific environmental triggers.

What causes Marshall syndrome (PFAPA)?

The exact cause of Marshall syndrome (PFAPA) is not fully understood, though current research suggests it is an autoinflammatory disorder rather than an autoimmune one. This means the innate immune system becomes activated without a clear external stimulus (like a bacterial infection). Unlike autoimmune diseases, there are no autoantibodies present. Current theories focus on a dysregulation of the cytokine pathway—specifically interleukin-1 (IL-1)—which triggers the body's inflammatory response. While it is not considered a traditional genetic disease, there is ongoing study into potential genetic predispositions that may make some children more susceptible to these immune flares.

Key differences between Marshall syndrome (PFAPA) and other periodic fevers

Distinguishing Marshall syndrome (PFAPA) from other conditions is essential for proper management. Key differentiating factors include:

• Predictability: Flares in Marshall syndrome (PFAPA) occur with remarkable regularity, often every 3 to 5 weeks.


• Health between episodes: Unlike many periodic fever syndromes (such as FMF), children with this condition are perfectly healthy and symptom-free between flares.


• Response to treatment: A single dose of corticosteroids often terminates an active flare quickly, which is a hallmark clinical sign used by physicians for diagnostic support.


• Long-term outlook: Most children eventually "outgrow" the condition, usually by age 8 to 10, with no long-term organ damage.

Next steps

• Consult a pediatric rheumatologist or an infectious disease specialist to confirm the diagnosis and rule out other periodic fever syndromes.


• Keep a detailed "fever diary" to track the frequency, duration, and specific symptoms of each episode, which is vital for your doctor.


• Join the DiseaseMaps.org community to connect with other families; currently, 7 members have shared their experiences with Marshall syndrome (PFAPA).


• Discuss treatment options, such as anti-inflammatory medications or tonsillectomy, with your physician if the frequency of flares is impacting your child's daily life.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): PFAPA Syndrome.


• Orphanet: Periodic fever, aphthous stomatitis, pharyngitis, adenitis syndrome.


• OMIM (Online Mendelian Inheritance in Man): Periodic Fever, Aphthous Stomatitis, Pharyngitis, and Adenitis Syndrome.


• American College of Rheumatology: Periodic Fever Syndromes in Children.