Thymoma CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [4] Associate Editor(s)-in-Chief: Amr Marawan, M.D. [5]Ahmad Al Maradni, M.D. [6]

Overview

• Computed Tomography scan may be diagnostic of thymoma.
• The tumor is generally located inside the thymus, and can be calcified.
• Increased vascular enhancement can be indicative of malignancy, as can pleural deposits.

CT Scan

When a thymoma is suspected, a CT/CAT scan is generally performed to estimate the size of the tumor. Key CT scan findings in thymoma include:

• Smooth or lobulated border that is partially or completely outlined by fat
• Homogeneous soft tissue mass
• Fibrosis, cysts, hemorrhage or necrosis may be seen as decreased attenuation
• Amorphous, flocculent central/curvilinear peripheral calcification

CT scan of the chest revealing a large necrotic mass in the left anterior mediastinum (later proven to be a thymoma) and bilateral hilar lymphadenopathy.

CT shows Thymoma (Thymoma, Stage IIA. CT scan, axial).

CT shows Thymoma (Image courtesy of RadsWiki and copylefted).

A 43-year-old female with myasthenia gravis. Chest CT demonstrate a small soft tissue mass at the anterior mediastinum, pathologically proven thymoma, axial.

A 43-year-old female with myasthenia gravis. Chest CT demonstrate a small soft tissue mass at the anterior mediastinum, pathologically proven thymoma, coronal.

CT shows Invasive Thymoma.

CT shows Invasive Thymoma.

CT shows anterior mediastinal mass, pathologically shown to be a thymoma.

CT demonstrates a well circumscribed soft tissue mass in the anterior mediastinum, proven to be thymoma.

CT demonstrates a well circumscribed soft tissue mass in the anterior mediastinum, proven to be thymoma.

CT demonstrates a well circumscribed soft tissue mass in the anterior mediastinum, proven to be thymoma.

CT showing well defined solid lesion is seen in the anterior mediastinum. No calcification cystic or fat component is seen within. ]]