A 55-day-old infant born prematurely at 27 weeks of gestation is shown below. The swelling is not tender, firm, hot, or red, and it does not transilluminate. It seems to resolve with pressure, but returns when the infant cries or strains. Which of the following is the most appropriate course of action at this point?
A
Obtain a surgical consultation.
B
Perform a needle aspiration.
C
Order a barium enema.
D
Order a KUB (plain radiographs of kidney, ureter, and bladder).