Hosting 718 files, 2916 images, and 4 contributors.

 
Random Case

Prune Belly Syndrome
Joseph Junewick, MD FACR
over 5 years ago
Enter A Workflow
Standard2   Academic2

Please choose a workflow. A standard workflow allows you to browse the repository with full case detail; the academic workflow allows you to browse the repository with limited case detail revealed. Double click on the images to launch image viewer.

ARSt Case Repository

Mediastinal Teratoma

Case Detail

Anatomy: Chest
Junewick
Joseph Junewick, MD FACR
Diagnostic Category: Neoplasia Benign
Created: over 8 years ago
Updated: over 8 years ago
Tags: PEDS
Modality/Study Types: CT
Activities:
Adobe32 PDF Imagej32 ImageJA

History

8 year old female with recent weight gain and difficulty breathing.


Case Images


Diagnosis

Mediastinal Teratoma

Clinical Notes

Alpha Feto-protein – Normal
Beta hCG – Normal

Findings

CT – Axial and sagittal and coronal reformatted post-contrast CT of the chest demonstrates a round well circumscribed mediastinal mass contiguous with the great vessels and thymus containing calcium, fat and soft-tissue densities.

Discussion

Mediastinal teratomas are germ cell tumors (GCTs) derived from one or more of the embryonic cell layers. Teratomas are classified as mature, immature, or mixed cell type. The most common extra-pelvic location for teratomas is the mediastinum, albeit comprising only 5% of all teratomas. Of these, 70-80% are benign mature teratomas with equal predilection for males and females. GCTs comprise 25% of all pediatric mediastinal masses.

Mediastinal teratomas almost always occur in the anterior mediastinum with very rare occurrences in the posterior mediastinum. Chest radiographs are usually the first to suggest their presence, but they are non-diagnostic unless teeth or skeletal parts are present. CT’s are equal or superior to MRI’s for further characterization and diagnosis. US and radionuclide studies are rarely utilized.

Almost all mature mediastinal teratomas reveal soft-tissue attenuation on CT. This is usually found in the periphery of the mass and associated with the tumor’s capsule. Fluid is most commonly the dominant component of a teratoma. Fat attenuation is also revealed in a majority of tumors. Calcifiction, either punctate, linear or flocculent, is also commonly seen. The presence of fat or calcification creates a high suspicion for teratoma.

Reference

Moeller KH, Rosado-de-Christianson ML, Templeton PA. Mediastinal mature teratoma: imaging features. AJR 1997; 169:985-990.

Ueno T, Tanaka YO, Nagata M et al, Spectrum of germ cell tumors: from head to toe. Radiographics 2004; 24(2): 387-404.

Tomiyama N, Honda O, Tsubamoto M et al, Anterior mediastinal tumors: diagnostic accuracy of CT and MRI. European Journal of Radiology 2009; 69: 280-288.

Binkovitz L, Binkovitz I, Kuhn J. The mediastinum. In: Slovis TL ed. Caffey’s Pediatric Diagnostic Imaging 11th Ed. Philadelphia: Mosby Elsevier, 2008: 1324-1388.

Contributor

Daniel Dykstra, MS-IV



Corporate Office: 616.363.7272, 3264 North Evergreen Drive, Grand Rapids, MI 49525

Spectrum Health Helen Devos Childrens Hospital GE HealthCare