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Mediastinum

Cystic lesions

Mullerian cyst (Hattori’s Cyst)


Reviewer: Hanni Gulwani, M.D. (see Reviewers page)
Revised: 16 March 2013, last major update December 2012
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.

General
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● First described in 2005 (Virchows Arch 2005;446:82)
● Typically women, in posterior mediastinum, showing müllerian differentiation (Ann Diagn Pathol 2007;11:417)
● Initially classified as bronchogenic or unspecified benign serous cysts

Case reports
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● 53 year old woman with previous mediastinal teratoma (Ann Thorac Cardiovasc Surg 2012;18:39)

Gross description
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● 1.3 to 5 cm with thin wall containing smooth muscle

Micro description
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● Lined by simple cylindrical or cuboidal, nonmucinous, and often ciliated epithelium resembling uterine tubal epithelium

Micro images
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Various images

Positive stains
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● CK7, EMA, ER, PR

End of Mediastinum > Cystic lesions > Mullerian cyst (Hattori’s Cyst)


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