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Foregut cyst
Haematoxylin & Eosin (H&E)
36 years
cyst in the anterior mediastinum (diameter 7cm), presence of a solid area (diameter 5cm) in the cyst
Cyst lined by columnar epithelium (positive for TTF1 and/or CDX2). Adjacent gastric and eccrine pancreatic tissue and ductal structures can be seen. Besides, there is tissue with extensive fibrosis and remnants of thymic tissue and chronic lymphohistiocytic inflammation.
Thomas Menter, University of Basel
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