This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
Adson&;s test is elicited in a suspected case of 
Select and explain. 
A. Congenital dislocation of hip, B. Cervicall rib, C. Subluxation of shoulder, D. Direct inguinal hernia
B: Cervicall rib
Answer: B: Cervicall rib 
Explanation: cervical rib is the extension of costal element(anterior pa) of transverse process of C7 veebra more than 2.5 cm(normal). Cervical rib narrows the scalene triangle Adson&;s test: the hand is raised above after seeing the radial pulse. the patient is asked to take a deep breath and turn the head to the same side. Any change in pulse, i.e. either becoming feeble or absent is noted (Ref: SRB&;s Manual of Surgery , 5th edition, pg no. 429)