Thymoma

Case contributed by A.Prof Frank Gaillard
X-ray

Soft tissue density projecting to the left of the mediastinum. The distal part of the arch and proximal descending aorta can be seen as separate suggesting it is located anterior to these structures.

Histology

The tumour is a thymoma of the cortical type.

The mass is firm and covered anterolaterally with a thin translucent membrane, consistent with mediastinal pleura. The cut surface is yellow-tan in colour with variably sized lobulation and focal haemorrhagic/degenerative areas in the central portion.

There is extension of the tumor into the surrounding mediastinal fat, outside of the tumor capsule, and this qualifies as an invasive thymoma. The tumor tends to push the mediastinal pleural margin and the pericardial structures. There is no evidence of pericardial involvement.

MRI

MRI confirms the presence of an anterior mediastinal mass without convincing macroscopic invasion. 

Case Discussion

Findings are consistent with a pathologically proven thymoma.

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Case information

rID: 8564
Case created: 11th Feb 2010
Last edited: 16th Jul 2017
System: Chest
Inclusion in quiz mode: Included

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