Rare Presentation of Rosai-Dorfman Disease in Soft Tissue: Diagnostic Findings and Surgical Treatment

Figure 1

Representative preoperative 1.5 Tesla MRI images. (a) T1 TSE sagittal (TR 625 ms, TE 13 ms). (b) T2 TSE sagittal (TR 4160 ms, TE 97 ms). (c) T1 VIBE FS axial (TR 5.07, TE 2.39 ms). (d) T2 TSE FS axial (TR 5080 ms, TE 81 ms). These images revealed a large mass in the subcutaneous tissues of the lower back. The mass measured 24.8 cm × 10.4 cm × 20.5 cm in transverse, anteroposterior, and caudocranial dimensions. It extended in close proximity to the superficial fascial plane over the paraspinal musculature. No definite muscular involvement was identified. The lesion demonstrated high signal on the T2-weighted sequences and intermediate signal on the T1-weighted sequences. TSE = turbo spin echo, FS = fat suppression, VIBE = volumetric interpolated breath-hold examination, TR = repetition time, and TE = echo time.

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