CP with Legg-Calve-Perthes Disorder

Hi all, I have patient with diaplegia CP. He was refered to me as have a hip pain. The child is a boy 11 Year old
Functional activities: able to walk, run, jump, climb stairs. His mother complains that her child started to have pain in his right hip region from 4 weeks. An X-ray was done which indicated that he has conginital abnormalities and hip degeneration in both sides.

Muscle tone decreased: both knee flexors around one degree in modified ashworth scale
Gait pattern: limping gait and bending forward with his hand being placed on his right hip because of pain....

Mother states that his pain sometimes cause him to stop walking and he starts to do crawling, also she state that the stiffness increases in winter and in hot weather his stiffness decrease, also she stated that after she give him hot shower his pain and stiffness decrease

I wonder whether this child has Legg-Calve-Perthes Disorder and he is diaplegic CP
Am I right with diagnosis? If it is right >> what will be the best treatment to this condition, what the precaution I have to take in case of his hip degeneration?

I am waiting for your answers

Regards

Hessa