Thymomas - cystic
Reviewer: Hanni Gulwani, M.D. (see Reviewers page)
Revised: 24 February 2013, last major update December 2012
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.
● Cystic degeneration of thymoma in anterosuperior mediastinum
● Associated with paraneoplastic syndromes
● Encapsulated, uniloculated or multiloculated
● Variable cystic contents
● Bland proliferation of thymic epithelium (spindle or polygonal cells) present in cyst wall
● Usually no cholesterol granulomas, no cartilage, no smooth muscle
Spindle cell thymoma (type A) has cysts of various sizes
● Thymic cyst: no/minimal thymic epithelial cells in cyst wall; no evidence of thymoma
End of Mediastinum > Cystic lesions > Thymomas - cystic
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