First of all, keep in mind that I am unable to diagnose you because I am unable to examine you, this forum is for educational purposes.
I share your concern that other conditions besides cerebral palsy (CP) can present with toe walking. With the symptoms of inability to heel walk, and pes cavus an alternative condition is possible charcot-marie tooth (CMT) neuropathy. As you suggest there are many different forms of muscular dystrophies [MD](although this is not a typical presentation of MD, which is large calf muscles and weakness with standing from a sitting position) and many genetic and protein test are available. That being said, tests such as MRI and EMG are not easily obtained in children. They often (almost always) require general anesthesia to complete the test, which is not without its own risk. I would recommend that you see a pediatric neurologist in a major academic center who will be able to decide which tests to send and if a EMG/MRI is indicated. If the EMG/MRI is decided on, then it can often be done on the same day, under the same anesthesia.
I hope this has been helpful.
Hope that helps.
Fiona
I am not a doctor and I cannot advise you on your child. Often times we are faced with these particle absolutes and it is awful.
The situation with tip-toe walking is actually a common presentation in children with MD.
But-MD is hereditary, in many cases.
Good Luck!
JCmcc.
My daughter is now booked for an MRI under GA. She is also going to have Botox injections in her legs. If she did have CMT and not cerebral palsy, would the Botox have a beneficial effect?