Gas in the calf and possible Baker's cyst rupture.
D000038:Abscess / Q000175:diagnosis / Q000209:etiology; D003937:Diagnosis, Differential; D006801:Humans; D007866:Leg; D008297:Male; D008875:Middle Aged; D011151:Popliteal Cyst / Q000175:diagnosis*; D012422:Rupture, Spontaneous; D013581:Synovial Cyst / Q000175:diagnosis*