Kawaguchi M, Kato H, Hara A, et al. - Sixteen individuals with histopathologically and immunohistochemically verified mediastinal cysts (four with mediastinal Müllerian cysts [MMCs] and 12 with bronchogenic cysts [BCs]) were involved to assess how CT and MRI features could be utilized to distinguish immunohistochemically validated MMCs from BCs. On the evaluation of CT images, cysts could be positioned to the anterior mediastinum, middle mediastinum, and posterior mediastinum in four BCs, in three MMCs and seven BCs, and in one MMC and one BC, respectively. In 4/4 MMCs and 6/12 BCs, contact with a vertebral body was noted. Significantly lower ratios of minimum-to-maximum diameter, CT attenuation, and cyst-to-spinal cord signal intensity ratios (SIRs) on T1-weighted images were discovered for MMCs vs BCs. No important variations in maximum diameter, minimum diameter, and SIRs on T2-weighted images were observed among MMCs and BCs. Hence, in characterizing mediastinal cysts in a middle-aged female patient, characteristics that are specific to MMCs are—contact with a vertebral body, flattened configuration, hypodensity on CT, and hypointensity in comparison with spinal cord on T1-weighted images.