Fig. 2

MRI images of the left armpit. A Three-dimensional reconstruction with volume rendering of the lesion showing its ill-defined and infiltrative aspect. B Axial pre-contrast T2 showing a heterogeneous, irregular and poorly delimited lesion in the left axillary region, extending through the adipose planes forming the tail sign (green arrow). Hypersignal areas are noted (yellow arrow), as well as low signal bands (band signal—red arrow). C Sagittal pre-contrast T2. A yellow arrow highlights the area with the greatest signal, and a red arrow shows the hyposignal bands. D Coronal pre-contrast T2 representing once again the areas of high signal (yellow arrow) and low signal (red arrow), in addition to fine projections of the tumor to the adjacent fat planes (blue arrow)