This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis & Scrotum, Subject name: Surgery
Which of the following should be done for an acute onset painful scrotal swelling in 12 years old male? 
Select and explain. 
A. Doppler stethoscope evaluation, B. Administer analgesics, C. Advise bed rest, D. Administer antibiotics
A: Doppler stethoscope evaluation
Answer: A: Doppler stethoscope evaluation 
Explanation: Ans. is 'a' i.e., Doppler stethoscope evaluation * Acute onset painful scrotal swelling in 12 years old preadolescent male is most probably due to torsion of testis. In suspected cases of torsion of testis or testicular appendage a doppler stethoscope should be used to evaluate blood flow to the testicles (if decreased or absent, suspect testicular torsion and prepare the patient for surgery).