Type AB Thymoma : Microscopic
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![Mediastinum_Thymoma_TypeAB_13A.jpg](/slides-13/slides/Mediastinum_Thymoma_TypeAB_13A.jpg)
Comments:
The lower left of this image of a type AB thymoma shows sheets of bland spindle epithelial cells (type A component). The upper right shows spindle cells admixed with numerous lymphocytes (type B component). The relative proportion of the two components is highly variable from case to case.