Fig. 1

Abdominal CT and MR scan. Abdominal CT scan [1] in axial view, initial (1A) and 6 months after starting antibiotic treatment (1B). The large left adrenal abscess (white arrow) is accompanied by inflammation of the surrounding fat (blue arrow). Note the normalization of the left adrenal gland (red arrow) and the disappearance of the inflammation of the surrounding fat. MR images [2] acquired during the antibiotic treatment. The T2 with fat saturation images (2A) shows a hypersignal in the anterior part of the left adrenal gland (orange arrow). On the enhanced T1 sequence (2B), this image is not enhanced (white arrow) corresponding to the central part of the abscess (necrosis), while the rest of the adrenal gland is normally enhanced (purple arrow). The hypersignal in diffusion sequence (3C, green arrow), especially with a very low ADC (apparent diffusion coefficient) (3D), here less than 0.5·10^− 6mm² s^− 1 (yellow arrow), leading to the diagnosis of abscess