Mature mediastinal teratoma (gross pathology)

Case contributed by Assoc Prof Frank Gaillard


Specimen obtained from the anterior mediastinum.

Patient Data

Age: 17 years
Gender: Male

Surgical specimen from anterior mediastinum

There is a well-circumscribed, heterogeneous, solid to focally cystic mass with thin peripheral rim and septa. The solid areas are composed of yellow adipose tissue and pale chalky material while cystic areas are partly smooth walled, in areas associated with hair. Image courtesy of AFIP. Please see case description page for licence and original file information.

Case Discussion

Mature cystic teratoma is a common neoplastic mediastinal tumor, predominantly seen in children and young adults.

On histology, the lesion is characterized by elements variably derived from the three germ cell layers (endoderm, mesoderm and ectoderm).

Mature mediastinal teratoma - gross pathology. Author: The Armed Forces Institute of Pathology (AFIP)

Original file:,_mediastinum.jpg

Modifications: square crop

License: This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. 

PEIR Digital Library (Pathology image database). Image# 414992. Image and description are from the AFIP Atlas of Tumor Pathology.

Declaration of PEIR: «Copyright Information - The Armed Forces Institute of Pathology Electronic Fascicles (CD-ROM Version of the Atlas of Tumor Pathology) contains both U.S. Government work and copyrighted materials used with permission of non-Government contributors. U.S. Government works may be used without restriction, but users of the Electronic Fascicle may not lawfully modify, rent, loan, distribute, create derivative works in whole or in part, or electronically transmit the copyrighted images from one computer to another or over a network without first obtaining permission from the copyright owners. All attempts have been made to remove copyrighted images from the PEIR Digital Library. If a copyright-protected image has inadvertently been included, please notify us and it will be removed immediately.»

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Case information

rID: 9221
Published: 25th Mar 2010
Last edited: 13th Aug 2019
System: Chest
Inclusion in quiz mode: Excluded

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