Figure 3.

Necrotizing fasciitis in the right upper limb of a 71-year-old male due to gas-forming organisms (Streptococcus anginosus). Radiograph shows faint air lucencies within the soft tissues (white arrows). (b) Axial T₂ weighted MR image shows thick hyperintense signal in the deep intermuscular fascia (white arrows). (c) Axial T₁ weighted MR image taken at a more distal level shows few tiny foci of signal void in the superficial fascia (white arrows). (d) Axial gradient-echo image shows blooming artefacts in the superficial fascia (white arrows) compatible with air foci—these are more apparent on the gradient-echo image than the T₂ weighted image. (e) Urgent fasciotomy and surgical debridement was performed. Cultures grew Streptococcus anginosus.