Which of the following movements is restricted in Perthe’s disease?: (A) Adduction & external rotation, (B) Abduction & external rotation, (C) Adduction & internal rotation, (D) Abduction & internal rotation
Answer is D. There is limitation of abduction & internal rotation due spasm of muscles. 
Other signs : 

antalgic gait * muscle spasm detected by roll test 
* proximal thigh atrophy 
* short stature Symptoms: painless limp, mild pain in the hip or anterior thigh or knee ,onset of pain may be acute or insidious