PMC9986532_01
Timeline with relevant data from the episode: Axial incidences (upper range) and sagittal incidences (lower range) of the: (A) 2015 contrast-enhanced chest CT scan examination, (B) The 2021 native chest CT scan examination and (C) the July 2021 T2 sequence of the MRI examination.
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f1
Indeed, the lesion was 1.9 x 1.2 x 1.7 cm and the patient was referred to thoracic surgery.  Figures 1A, B  show the comparative CT scan and MRI examinations.
(A) Macroscopic aspect of the resected specimen: thymus including the thymic cyst, which is not visible. The intrathymic situation of the thymic cyst is indicated with a yellow arrow on the picture. (B) Microscopic aspect of the cyst: coloration HE, magnification x400: Cyst wall lined with a unistratified layer of respiratory-type mucosa associated (red arrow) with slight fibrous and inflammatory lesions.
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f2
The rest of the thymic parenchyma was in adipose involution, it did not present any anomaly ( Figure 2 ).