Periodic fever-infantile enterocolitis-autoinflammatory syndrome

Periodic fever-infantile enterocolitis-autoinflammatory syndrome (also known as PFIEC or NLRC4-related autoinflammatory disease) is an extremely rare genetic condition that causes the body's immune system to become overactive without an infection being present. This disease is caused by mutations in the NLRC4 gene, which plays a key role in the body's inflammatory response. When this gene is faulty, it triggers excessive inflammation that primarily affects the gut and causes recurring fevers. Babies and young children with this condition typically experience episodes of high fever, severe diarrhea, and inflammation of the intestines (enterocolitis) that can begin in the first weeks or months of life. During flare-ups, the inflammation can become life-threatening, sometimes leading to a dangerous condition called macrophage activation syndrome (MAS), where the immune system goes into overdrive and can damage multiple organs. Blood tests during episodes often show very high levels of inflammatory markers. Treatment focuses on controlling the overactive immune response. Medications that block a specific inflammatory protein called interleukin-18 (IL-18) or interleukin-1 (IL-1) have shown benefit in some patients. Anakinra, an IL-1 blocker, has been used, and newer targeted therapies are being explored. Early diagnosis and prompt treatment of flare-ups are critical to preventing serious complications. Because this disease is so rare, management is best handled by specialists experienced in autoinflammatory conditions.

Bring these to your next appointment

• Q1.What specific NLRC4 mutation does my child have, and does it affect the expected severity of the disease?,What is the plan if my child develops macrophage activation syndrome, and what signs should I watch for?,What medications will my child need, and what are the possible side effects?,Are there any clinical trials or newer therapies, such as anti-IL-18 treatments, that my child might be eligible for?,How often will my child need blood tests and specialist visits?,Should other family members be tested for the NLRC4 mutation?,What should I do if my child develops a fever — how do I tell the difference between a disease flare and a normal childhood infection?

Common questions about Periodic fever-infantile enterocolitis-autoinflammatory syndrome

Related conditions

Other rare diseases commonly researched alongside Periodic fever-infantile enterocolitis-autoinflammatory syndrome.

• Muckle-Wells syndrome→