<prompt> Telescopic test is useful to diagnose?Pehes diseaseIntracapsular fracture neck of femurMalunited trochanteric fractureAnkylosis of hip joint  <response>: In supine position, hip and knee are flexed as much as 90 degree and thigh is pulled up and pushed down. Even in normal condition a slight amount of excursion of trochanter can be felt by other hand. If excursion is more, then this indicates instability of the hip joint such as: Old unreduced posterior dislocation Loss of neck and head in old fracture neck femur paralytic hip Ref: Clinical ohopedic Diagnosis: Sureshwar Pandey 2e, Page 262. 