Dear Mishra. 

Monomelic amyotrophy (Benign Focal Amyotrophy, Hirayama Syndrome, O’Sullivan-McLeod Syndrome) is a benign anterior horn cell disorder, clinically presenting as wasting of a single limb, first described by Hirayama in 1959.  In most cases, the cause is unknown, although there have been a few published reports linking monomelic amyotrophy to traumatic or radiation injury. Diagnosis is made by physical exam and medical history.

I dont have any experience with children. 

I hope I could help you.

Sincerely,

Dr Mehmet

lots of thanx dr. mehmet

Hi Mishra. There are also reports postulating infectious trigger for some cases. You can check this case series below.

http://www.ncbi.nlm.nih.gov/pubmed/19645058

Dear Khair,

I read this article. Thank you.

Dr Hehmet

Thank you Dr khair. Good article.