My 2 year old daughter cannot walk, doctors baffled?

My daughter turned 2 recently and she is finding it extremely difficult walking by her self, however she is able to stand with support and is able to walk using objects like tables or chairs. I have taken her to a few doctors who seem baffled, she has very poor lower limb movement and strength. The size of her lower limb are disproportionate to her upper body, she has no muscle mass in her legs and they may have begun to atrophy? she also has hypermobility in her knees which is also affecting her lower limbs, and walking.
Tests completed:
1. Nerve conduction Studies: very poor results in legs.
2. MRI Spine (under G.A) did not find anything.
3. Blood tests all good!

FIND THE BEST DOCTORS NEAR YOU

Cardiologists – Cosmetic Surgeons – Dermatologists – Ear, Nose and Throat Specialists – Gastroenterologists – Gynecologists/Obstetricians – Neurologists – Oncologists – Orthopedic surgeons – Pediatricians – Psychiatrists – Pulmonologists – Urologists