This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Telescopic test is useful to diagnose? 
Select and explain. 
A. Pehes disease, B. Intracapsular fracture neck of femur, C. Malunited trochanteric fracture, D. Ankylosis of hip joint
B: Intracapsular fracture neck of femur
Answer: B: Intracapsular fracture neck of femur 
Explanation: 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 2/e, Page 262.