A medical illustration showing the anterior and cross-sectional views of the right arm comparing a normal arm anatomy and an arm with compartment syndrome. The cross-sectional view of the arm with compartment syndrome is characterized by swelling of the compartments. Anatomy highlighted in the cross-sectional view includes the dorsal compartment, deep volar compartment, superficial volar compartment, mobile wad of Henry, radius, radial nerve, radial vessels, median nerve, ulnar nerve, ulna, ulnar vessels, posterior interosseus vessels, and the posterior interosseus nerve.