This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
While sharpening his knife, a 23-year-old male soldier accidentally punctured the ventral side of the fifth digit at the base of the distal phalanx. The wound became infected, and within a few days the infection has spread into the palm, within the sheath of the flexor digitorum profundus tendons. If the infection were left untreated, into which of the following spaces could it most likely spread? 
Select and explain. 
A. Central compartment, B. Hypothenar compartment, C. Mid-palmar space, D. Thenar compartment
C: Mid-palmar space
Answer: C: Mid-palmar space 
Explanation: The infectious agent was introduced into the synovial sheath of the long tendons of the little (fifth) finger. Proximally, this sheath runs through the mid-palmar space, and inflammatory processes typically rupture into this space unless aggressively treated with the appropriate antibiotics.