Fig. 5.

Lateral superficial Staphylococcus aureus suppurative lymphadenitis in an 11-month-old boy. Images show a large enhancing lateral neck mass (a–d arrows) and surrounding tissue edema. Contrast-enhanced images reveal a non-enhancing fluid collection (b, d arrows) amidst the mass with low apparent diffusion coefficients (c), consistent with suppurative lymphadenitis. Purulence was found during surgery and Staphylococcus aureus in pus culture. a Axial T2-weighted with fat saturation. b Axial T1-weighted post-contrast. c Axial apparent diffusion coefficient. d Sagittal T1-weighted post-contrast