PMC7452476_01
Imaging findings of multilocular thymic cyst.. (a) Enhanced computed tomography image showing a multilocular cystic anterior mediastinal tumor. Magnetic resonance imaging showing that the tumor has (b) a lower intensity on a T1-weighted image and (c) a higher intensity on a T2-weighted image.
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A computed tomography (CT) scan was performed on a 60-year-old man with hypertension and a history of 40 pack-years of smoking, which revealed an 8.5 cm multilocular cystic lesion in the anterior mediastinum (Fig. 1a). Magnetic resonance imaging (MRI) showed that the tumor had a lower intensity on T1-weighted imaging and had a higher intensity on T2-weighted imaging (Fig. 1b, c).
Macroscopic findings of multilocular thymic cyst.. (a, b) Multiple 1-cm cysts are observed in the thymus, and these contain gelatinous substances.
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Macroscopic findings of the tumor revealed multiple 1-cm cysts in the thymus, and these contained gelatinous substances (Fig. 2a, b).
Histopathological findings of multilocular thymic cyst.. (a, b) Multiple cysts with partially squamous or columnar epithelium containing eosinophilic substances and cholesterol crystals (orange arrows) are observed in the thymic tissue. Hassall's corpuscles (yellow arrow) and reactive lymphoid hyperplasia with prominent germinal centers are observed around the cysts.
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Histopathological findings revealed multiple cysts with partially squamous or columnar epithelium containing eosinophilic substances and cholesterol crystals in the thymic tissue (Fig. 3a, b).