Hi. You may also check the post titled GBS/CIDP.
SPECT imaging , Brain amd Spine MRI's results needed for evaluation
Complete history before onset, including significant events
injuries, trauma both physical and emotional, infections etc,
would help narrow it down.
Niko
Muscle atrophy is usually caused from neuromuscular disease or injury. However, it may also stem from certain metabolic and endocrine disorders.
Amyotrophic lateral sclerosis
Comartment syndrome and Volkmann's ischemic contracture
hypercortisolism
hypothyroidism
multiple sclerosis
parkinson's disease
protein deficiency
spinal chord injury
thyrotoxicosis
Although it supposedly wiped out here, a check for polio might be a good idea. In some, the immunization doesn't make the immune response that is hoped for and polio becomes a latent infection that emerges later in life. Then there's polio vaccines contaminated with SV40, a cancer causing monkey virus.