Abdominal Radiology

, Volume 42, Issue 5, pp 1616–1617 | Cite as

‘Sack of marbles’ in mature cystic ovarian teratoma

  • K. H. LeeEmail author
Classics in Abdominal Imaging


Mature ovarian cystic teratoma (also known as ovarian dermoid cyst) is a slow growing encapsulated tumor which contains well differentiated derivations of at least two out of three germ cell layers (i.e. ectoderm, mesoderm, and endoderm). The lesion is lined by ectodermally derived squamous epithelium containing skin appendages. The cyst content commonly consists of keratin, sebaceous materials and fat. On CT images, the intracystic globules of sebum/fat could appear as multiple free floating rounded hypoattenuating nodules, giving the classical ‘sack-of-marbles’ appearance.


Intracystic fat globules Ovarian dermoid cyst Mature cystic teratoma Computer tomography 


Compliance with ethical standards


No funding was received for this study.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

Statement of informed consent was not applicable since the manuscript does not contain any patient data.


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  4. 4. Photo courtesy of Susanna Giaccai. Accessed 16 Jan 2017.

Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Department of RadiologyQueen Mary HospitalHong KongHong Kong SAR

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