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Insights into Imaging
Fig. 5 | Insights into Imaging

Fig. 5

From: Characteristics and outcomes of anterior mediastinal cystic lesions diagnosed on chest MRI: implications for management of cystic lesions

Fig. 5

Follow-up outcome of 46-year-old female with anterior mediastinal cystic lesion who underwent chest MRI. Initial contrast-enhanced chest CT shows a 46 mm anterior mediastinal mass with heterogeneous attenuation (arrow, a). Patient underwent chest MRI after 2 weeks. On chest MRI, the lesion shows mostly high signal intensity with linear dark signal intensity septa on axial T2-weighted images (arrow, b), suggesting multilocular cystic lesion. On subtraction images of axial post- and pre-contrast T1-weighted images, the lesion shows enhancing wall (arrow, c) with irregular and eccentric wall thickening (arrowhead, c). The lesion can be classified as an indeterminate lesion (complex cyst) based on chest MRI findings and the differential diagnosis of MRI reading included complicated thymic cyst and cystic thymoma. Patient underwent 3-month follow-up after the MRI rather than immediate surgery. On 3-month follow-up CT, the lesion shows a marked decrease in size of anterior mediastinal lesion (arrow, d), which suggests the benign nature of lesion, complicated thymic cyst

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