Flaccid Myelitis

Acute Flaccid Myelitis (AFM) diagnosis and care at Liv Hospital’s Pediatric Neurology Center.

Liv Hospital provides advanced evaluation and multidisciplinary care for Acute Flaccid Myelitis (AFM), protecting neurological health in children.

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Acute Flaccid Myelitis (AFM): Overview and Definition

What Is Acute Flaccid Myelitis (AFM)?

Acute Flaccid Myelitis (AFM) is a serious and rare neurological condition that primarily affects children. it targets the gray matter of the spinal cord the area responsible for muscle control and reflexes. This damage causes the muscles and reflexes in the body to become suddenly weak or “flaccid.”

AFM is often considered a “polio-like” condition because it presents with similar limb weakness and paralysis. However, unlike polio, it is most commonly linked to other viral infections, particularly enteroviruses. While it is rare, the sudden onset of paralysis makes it a medical emergency that requires immediate hospitalization and specialized care.

The Anatomy of the Spinal Cord

The spinal cord is the highway for signals between the brain and the body. AFM specifically attacks the anterior horn cells in the gray matter. When these cells are inflamed or damaged, the “go” signal from the brain cannot reach the muscles, leading to the characteristic “floppy” weakness known as flaccid paralysis.

Symptoms and Conditions:

What Are the Symptoms of Acute Flaccid Myelitis (AFM)?

The hallmark of AFM is the rapid onset of arm or leg weakness, often occurring within hours or days of a viral illness. Patients may also experience facial droop, difficulty swallowing, or slurred speech.
Because the condition affects the nervous system, these symptoms can escalate quickly.

The Viral Connection

Most children with AFM have a history of a mild viral illness (fever, cough, or runny nose) about one to two weeks before the weakness begins. Research strongly suggests that viruses like Enterovirus D68 (EV-D68) and EV-A71 are the primary triggers.
The virus causes an inflammatory immune response that mistakenly attacks the spinal cord’s gray matter.

Diagnosis and Evaluation:

How Is Acute Flaccid Myelitis (AFM) Diagnosed?

Diagnosing AFM is complex because it mimics other neurological disorders like Guillain-Barré syndrome or Transverse Myelitis. The “gold standard” for diagnosis is a High-Resolution MRI of the spinal cord, which shows specific lesions in the gray matter.

Classification and Severity

AFM can range from mild weakness in a single limb to total paralysis of all four limbs and the respiratory muscles.

Localized AFM: Affecting only one limb or segment.

Global AFM: Affecting multiple limbs and potentially the muscles used for breathing.

Treatment and Care

Why Does Acute Flaccid Myelitis (AFM) Mainly Affect Children?

The vast majority of AFM cases occur in children (the average age is around 5 years old). Scientists are still investigating why children’s nervous systems are more susceptible to this specific immune response following a common cold virus.

Long-Term Neurological Impact

AFM is a serious condition with varying outcomes. Some children recover significant function, while others may face lifelong paralysis or muscle atrophy.
The degree of recovery is often tied to how quickly rehabilitation is started.

Growth and Prevention

Prevention and Long-Term Recovery in Acute Flaccid Myelitis (AFM)

While there is no vaccine for the specific enteroviruses that cause AFM, “prevention” focuses on standard hygiene practices and rapid recognition of symptoms. Growth in children with AFM involves long-term physical therapy and sometimes specialized nerve-transfer surgeries.

The Multidisciplinary Team

Managing AFM requires a highly specialized team, including pediatric neurologists, infectious disease experts, physiatrists (rehab doctors), and respiratory therapists. This coordinated effort is essential to stabilize the child during the acute phase and plan for a lifetime of mobility.

Why Liv Hospital for AFM?

At Liv Hospital, our Pediatric Neurology and Neuro-Rehabilitation teams provide rapid 3T MRI imaging for early, accurate diagnosis of Acute Flaccid Myelitis. Our advanced intensive care units offer respiratory support when needed, and our rehabilitation specialists apply targeted physical therapy programs to maximize recovery.
We combine cutting-edge neurological treatment with compassionate, family-centered care to guide your child’s recovery journey.