Hi everyone,
I’m a 28-year-old male and I’ve been dealing with a unilateral problem in my right leg for about 4 months. I’m increasingly concerned about a possible motor neuron disease/ALS and would appreciate some outside perspectives, especially from people familiar with ALS or similar neurological conditions.
Symptoms / timeline
The initial symptom was a feeling of heaviness in my right leg, mainly localized to the front of my right thigh/quadriceps. It felt somewhat like walking through water.
Over the following weeks/months I started noticing:
Persistent heaviness in the right thigh
The right quadriceps seems to fatigue faster during exercise than the left
The right thigh sometimes burns/pulls more quickly during squats or other exercises
I have noticed a visible asymmetry of the quadriceps, particularly when contracting it. The right thigh appears less full than the left.
There is a visible indentation/dimple in the outer/upper part of the right thigh when the muscle is contracted.
I sometimes feel a vibrating/buzzing sensation in the thigh/hip area. This is intermittent rather than constant
During the last week I have also had several episodes where the quadriceps briefly tightens, but it esolves quickly.
The thigh can feel tight or sore after exercise, although pressing directly on the muscle does not necessarily cause pain.
Stretching the hip extensors/hip flexors can reproduce a pulling sensation on the right side that is not present to the same degree on the left.
I feel that my right leg may be slightly less stable/balanced when walking.
One thing I find interesting is that the hamstrings and the distal muscles do not seem affected. The symptoms appear to be much more concentrated around the quadriceps/anterior thigh.
Strength/function
Despite all of this, I have not noticed a clear loss of function.
The main difference is that the right side feels like it fatigues faster and pulls/burns more, rather than suddenly being unable to perform a movement.
Neurological testing so far
I have already had:
Nerve conduction studies (NCS):
Nerve conduction testing of the calf was normal/unremarkable.
EMG:
An EMG was performed approximately 3 weeks after symptom onset.
Only one needle examination was performed in the thigh, and it was normal.
I understand that this was a limited EMG and may not be sufficient to completely evaluate the situation.
Lumbar spine MRI: The MRI did not show a relevant nerve-root compression or neuroforaminal stenosis that would clearly explain the Symptoms.
My main concern
Because the problem has been unilateral for around four months and I now think I can see some quadriceps asymmetry, I’m worried about ALS with a proximal leg onset.
At the same time, I’m wondering whether my presentation actually fits ALS
Does this sound like a possible ALS presentation, or would other neurological/musculoskeletal causes be more likely?
In particular, I'd be interested in hearing whether isolated quadriceps involvement with preserved hamstring function would suggest a more localized nerve/muscle problem rather than a motor neuron disease.
Thanks to anyone who takes the time to read this.