1682
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Spindle cell type B3 thymoma
Thymus
Haematoxylin & Eosin (H&E)
74 years
female
74 years old woman with a mediastinal tumor (17cm) with prolaps into the vena cava superior.
Tumor composed of spindle cells with enlarged nuclei and prominent nucleoli. There are scant lymphocytes admixed with the tumor cells.
The differential diagnosis to a type A thymoma can be difficult. In the reticulin staining, the reticulin fibers surround the individual tumor cells in the type A thymoma.
Huber Bettina
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