Early Diagnosis of Myasthenia Gravis: Why It Matters and How It Is Confirmed
Myasthenia gravis (MG) is an autoimmune disease in which the immune system interferes with communication between nerves and muscles. The typical result is muscle weakness that worsens with exertion and improves with rest. It can affect the eyes, face, swallowing, voice, arms, or legs and, in some cases, breathing.
Why is rapid diagnosis crucial?
An early diagnosis makes it possible to start the most appropriate treatment from the outset, achieve better symptom control, and reduce the impact on daily life.
A recent European real-world clinical practice study examined the effect of diagnostic delay in people with generalized myasthenia gravis (387 patients from several European countries). The findings suggest that delays are relatively common and may be associated with a greater disease burden:
The average time to diagnosis was approximately one year.
1 in 4 patients waited more than a year to receive the correct diagnosis.
Patients with longer delays experienced more symptoms and greater impact.
They also required more medical visits and saw more specialists before reaching a definitive diagnosis.
The message is clear: identifying the disease early enables better control from the beginning.
Warning signs to be aware of Myasthenia gravis can be mistaken for other conditions.
Typical signs include:
Drooping eyelid (ptosis).
Double vision.
Difficulty speaking or a nasal-sounding voice.
Problems chewing or swallowing.
Weakness in the arms or legs that worsens with activity.
Symptoms that fluctuate throughout the day.
How is the diagnosis confirmed?
Diagnosis is usually made by a neurologist and combines several tools:
Medical history and physical examination
The physician evaluates the type of weakness, its variability during the day, and the muscles involved.Blood tests
These can detect specific antibodies associated with myasthenia gravis in many patients.Neurophysiological tests
These assess how muscles respond to repeated stimulation and help confirm impaired neuromuscular transmission.Rapid test
This involves intravenous administration of a fast-acting medication that temporarily improves communication between nerve and muscle.
In people with myasthenia gravis, a brief but clear improvement in strength may be observed, such as elevation of a drooping eyelid or improvement in voice, supporting the diagnosis.Thymus evaluation
In some cases, chest imaging studies are performed to assess the thymus, a gland that may be involved in the disease.
The importance of acting on early symptoms
If symptoms compatible with myasthenia gravis appear, it is advisable to consult a healthcare professional and describe in detail:
When symptoms occur.
Which activities worsen them.
Whether they improve with rest.
Early diagnosis allows appropriate treatment to be established from the beginning and improves prognosis and quality of life.
In the event of breathing difficulty or sudden worsening of strength, urgent medical attention should be sought.
