Multiple sclerosis is a chronic autoimmune disease that affects more than 2.8 million people worldwide. Its diagnosis and treatment are essential to improving patients’ quality of life.
Multiple sclerosis (MS) is a chronic autoimmune neurological disease that affects the central nervous system (CNS), which consists of the brain and spinal cord. In MS, the immune system mistakenly attacks myelin, a substance that coats nerve fibers like an insulator and facilitates the rapid and efficient transmission of nerve impulses.
This inflammation, triggered by the immune system, causes damage, resulting in lesions or scarring in the CNS that are responsible for possible disability and can be detected by magnetic resonance imaging. The disruption of these nerve signals causes a wide range of symptoms, which vary in type and severity depending on the location and extent of the lesions. MS is not hereditary, although there is some genetic predisposition.
MS primarily affects young adults, with a typical age of onset between 20 and 40 years, and is more common in women than in men. It is estimated to affect more than 2.8 million people worldwide and around 1 in 1,000 people in Spain.
Types of multiple sclerosis
There are several types of multiple sclerosis, each with different characteristics and progression patterns. These types are currently under review and are expected to change soon:
Primary Progressive Multiple Sclerosis (PPMS): it is characterized by a gradual worsening of neurological function from the onset, without frequent relapses or remissions.
Relapsing-Remitting Multiple Sclerosis (RRMS): it is the most common type, characterized by relapses, which consist of new neurological symptoms, followed by periods of partial or complete remission.
Secondary Progressive Multiple Sclerosis (SPMS): following a relapsing-remitting MS (RRMS) phase, some patients experience a progressive worsening of disability unrelated to relapses. Although there may be superimposed relapses, the biggest problem is the accumulation of disability.
Symptoms of multiple sclerosis
MS is characterized by great variability in the presentation and progression of symptoms. Each patient may experience one or more symptoms, so each person will have a different experience of the disease. Some of the most common symptoms include:
Vision problems:
this is often one of the first symptoms in many cases. It consists of blurred vision, double vision, eye pain, and temporary loss of vision.
Numbness and tingling in the limbs, face, or trunk.
Weakness in the limbs, difficulty walking.
Fatigue
Balance and coordination problems.
Spasticity:
muscle stiffness and spasms, most frequently in the legs.
Cognitive problems:
difficulties with memory, attention, information processing, and problem-solving.
Bladder and bowel problems:
incontinence or difficulty emptying the bladder or bowel.
Neuropathic pain:
chronic pain caused by nerve damage.
Emotional changes:
depression, anxiety, or emotional lability.
It is important to note that not everyone with MS experiences all of these symptoms, and the combination and intensity of these symptoms vary considerably.
Causes of multiple sclerosis
The exact cause of MS remains unknown. Scientific evidence suggests a complex interaction between a genetic predisposition and environmental factors.
Risk factors and predictors of worse prognosis in multiple sclerosis
It is essential to understand that the presence of these factors does not guarantee the development of MS, and their absence does not completely rule it out. Next, we will differentiate between risk factors for developing MS and factors that, once the disease is diagnosed, may indicate a poorer prognosis.
Factors can increase the risk of developing MS:
Family history: although MS is not considered a hereditary disease in the traditional sense, genetics plays an important role. Having a first-degree relative (parent, sibling, or child) with multiple sclerosis (MS) increases the risk of developing the disease.
Viral infections: some viral infections, such as the Epstein-Barr virus (the virus that causes mononucleosis), have been associated with an increased risk of MS. It is believed that these infections can trigger the autoimmune response that damages myelin.
Factors associated with a worse prognosis in MS:
Initial symptoms: certain initial symptoms, such as mobility or brainstem problems, may indicate a worse prognosis.
Frequent relapses at the onset of the disease: a high frequency of relapses in the first few years after diagnosis may predict a faster progression of the disease.
MRI lesions: a greater number of lesions or larger lesions on MRI of the brain and spinal cord may indicate a worse prognosis.
Smoking: continuing to smoke after a diagnosis of MS is associated with a faster progression of the disease.
Low levels of vitamin D: several studies have shown a correlation between low levels of vitamin D and a worse prognosis in MS. Vitamin D plays an important role in regulating the immune system, and its deficiency is believed to contribute to inflammation and damage to myelin. Maintaining adequate vitamin D levels through sun exposure, diet, or supplements may be beneficial for people with MS.
Complications of multiple sclerosis
As a consequence of the accumulation of lesions in the CNS, the person with MS may develop disability, which usually manifests itself, as mentioned, in walking problems, stiffness, bladder problems, or cognitive problems. Today, thanks to the availability of multiple treatments and their improved use, the goal is to prevent this disability from occurring.
Diagnosis of multiple sclerosis
There is no specific test to diagnose multiple sclerosis. The diagnosis is based on a process of exclusion, where other conditions that could cause similar symptoms are ruled out. This is known as differential diagnosis. The process requires a thorough evaluation by a specialized neurologist and is based on a combination of:
Medical history: review of symptoms, medical history, and family history.
Lumbar puncture: it is used to analyze cerebrospinal fluid for data that suggest MS and rule out other processes.
Evoked potentials: they measure the electrical activity of the brain in response to visual, auditory, or sensory stimuli.
Optical Coherence Tomography: it is a simple test performed in ophthalmology that evaluates the thickness of the optic nerve and the layers of the retina.
Differential diagnosis is crucial to distinguish MS from other neurological diseases that may present similar symptoms, such as lupus, Lyme disease, and other autoimmune conditions.
Treatment of multiple sclerosis
Although there is no definitive cure for MS, there are multiple treatment options available that aim to modify the course of the disease, reduce the frequency and severity of relapses, and manage symptoms. Here is a more detailed description of the treatment strategies:
Disease-modifying drugs (DMDs): these drugs aim to reduce the frequency and intensity of relapses and slow the progression of disability. There are different classes of disease-modifying drugs, so in recent years we have been able to choose the treatment based on the severity of the disease and the preferences of the person with MS.
Treatment of multiple sclerosis relapses: for acute relapses, corticosteroids can be used to reduce inflammation and speed up recovery.
Symptomatic treatment: this is another pillar of disease care. The neurologist and other treating specialists should be consulted about the different problems in order to find the therapeutic options that best control the symptoms.
Rehabilitation and complementary therapies: rehabilitation plays a crucial role in the management of MS. Physical therapy helps maintain muscle strength, flexibility, and balance, while occupational therapy helps patients adapt to physical limitations and perform activities of daily living. Speech therapy can help improve speech and swallowing problems.
Cognitive therapy: multiple sclerosis can affect cognitive functions, such as memory, attention, and problem-solving ability. Cognitive therapy is a form of psychotherapy that helps people with MS identify and modify negative thought patterns and develop strategies to improve their cognitive function. This therapy can be individual or group-based and focuses on teaching patients techniques to improve memory, attention, organization, and problem-solving. Cognitive therapy can also help patients manage stress, anxiety, and depression, which are common in people with MS.
Psychological care and emotional support: psychological therapy and support groups can be essential in coping with the emotional challenges associated with MS. You can find information about our specialized psychological care service.
The approach to MS requires a multidisciplinary team that includes neurologists, specialized nurses, physiotherapists, occupational therapists, speech therapists, psychologists, neuropsychologists, and other health professionals. Early diagnosis and treatment are crucial for a better prognosis and to minimize the impact of the disease on the patient’s life.
Remember that this article is for informational purposes only and does not replace professional medical advice. If you suspect you have multiple sclerosis, consult a specialist to obtain an accurate diagnosis and an appropriate treatment plan tailored to your needs. diagnóstico preciso y un plan de tratamiento adecuado a tus necesidades.
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