the Causes and Concerns of ALS: A Patient's Journey - Neurology

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The causes of amyotrophic lateral sclerosis (ALS)?


Hello, doctor.
I apologize for the interruption.
On November 21, I visited a clinic due to static tremors in my hands and feet, where I underwent four X-rays—two of my cervical spine and two of my lumbar spine.
It was found that the close proximity of the intervertebral discs between the fifth and sixth cervical vertebrae might be the cause.
However, after the X-rays, I subsequently experienced dizziness, nausea, and dry eyes.
The next day, I noticed pain in my thyroid area and asymmetry on the right side (with a slight swelling sensation), along with tinnitus.
On November 25, I discovered persistent muscle twitching, particularly in the soles of my feet, which felt like it was happening all day.
Additionally, I experienced intermittent twitching in other areas, including my buttocks, the back of my hands near the joints, arms, and thighs.
I am very concerned that this persistent muscle twitching may be a precursor to amyotrophic lateral sclerosis (ALS).
Furthermore, my shoulders feel sore, and while I can still lift things with my right hand, it feels slightly strained.
Therefore, I am very worried that I might have developed ALS.

In previous discussions regarding ALS, one response mentioned that the causes of motor neuron disease are often unknown and may include genetic factors, heavy metal poisoning, gene mutations, viral infections, deficiencies in growth hormones, and excitotoxicity.
Regarding gene mutations, could it be possible that the X-rays or CT scans caused related cell death, leading to the destruction of DNA linkages and the gradual degeneration of substantia nigra cells? (Cells that are repaired after damage may have defects and could be eliminated by immune cells, resulting in cell death.) I am not aware of any statistical studies or related papers on this matter.
Do patients who unfortunately develop ALS typically have a history of brain X-rays or CT scans? Or is there any follow-up data on patients who have undergone head and neck CT scans, indicating whether they gradually develop ALS over the years? Thank you for your patience, and I appreciate your help.

Xiao Bai, 40~49 year old female. Ask Date: 2023/11/26

Dr. Cai Zongzhang reply Neurology


Hello, Xiao Bo: There are various possible causes for involuntary muscle twitching, and it cannot be directly attributed to amyotrophic lateral sclerosis (ALS).
If the symptoms do not improve after adequate rest, it is recommended to visit a neurology clinic for evaluation.

Reply Date: 2023/11/26

More Info


Understanding Amyotrophic Lateral Sclerosis (ALS) and its potential causes is crucial for patients and their families who are navigating the complexities of this condition. ALS, also known as Lou Gehrig's disease, is a progressive neurodegenerative disorder that affects motor neurons in the brain and spinal cord, leading to muscle weakness, paralysis, and ultimately respiratory failure. The exact cause of ALS remains largely unknown, but several factors have been proposed, including genetic predispositions, environmental influences, and possibly viral infections.

In your case, the symptoms you describe—muscle twitching (fasciculations), discomfort in the neck and thyroid area, and feelings of dizziness—can understandably lead to concerns about ALS. However, it is essential to recognize that muscle twitching can occur for various reasons, including stress, anxiety, fatigue, or benign fasciculation syndrome, which is not related to ALS. The presence of muscle twitching alone is not sufficient to diagnose ALS, as this condition typically presents with a combination of symptoms, including muscle weakness, atrophy, and difficulty with coordination.

Regarding your concerns about X-rays and CT scans potentially causing genetic mutations or contributing to ALS, current scientific literature does not support a direct link between imaging studies and the development of ALS. While radiation exposure from medical imaging is a valid concern, the doses used in standard X-rays and CT scans are generally considered safe and are not associated with causing genetic mutations that would lead to neurodegenerative diseases like ALS. The genetic mutations that have been identified in familial cases of ALS are typically inherited and not acquired through environmental exposures such as radiation.

As for your specific questions about the relationship between imaging studies and ALS, there is no substantial evidence or statistical research indicating that patients who have undergone X-rays or CT scans are at an increased risk of developing ALS. Most ALS cases are sporadic, meaning they occur without a clear family history or identifiable cause. While some studies have explored potential environmental risk factors for ALS, such as exposure to heavy metals or toxins, these findings are still under investigation and do not establish a direct causative relationship.

If you are experiencing persistent symptoms such as muscle twitching, discomfort, or other neurological signs, it is crucial to consult with a neurologist who can conduct a thorough evaluation. This may include a detailed clinical history, neurological examination, and possibly additional tests such as electromyography (EMG) or nerve conduction studies to assess muscle and nerve function. Early diagnosis and intervention can significantly impact the management of symptoms and improve quality of life.

In summary, while your concerns about ALS are understandable given your symptoms, it is essential to approach this situation with a comprehensive evaluation by a healthcare professional. They can help clarify your symptoms, rule out other potential causes, and provide you with the appropriate care and support. Remember, many conditions can mimic the symptoms of ALS, and a thorough investigation is key to finding the right diagnosis and treatment plan.

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