12 March 2025
: Case report 
Thymoma-Induced Severe Biventricular Failure without Myasthenia Gravis: Investigating Tachycardia-Induced Cardiomyopathy
Challenging differential diagnosis, Unusual or unexpected effect of treatment, Rare disease, Rare coexistence of disease or pathology
Roscoe Lim AEF 1,2, Stephanie Wiltshire AEF 1, Megan Barnet
E 3,4,5,6, Julia P. Low BE 3,7, Samuel Bolitho E 8, Alisa Kane E 9, Andrew Jabbour E 1, Eugene Kotlyar E 1, Christopher Hayward AE 1,3,10*
DOI: 10.12659/AJCR.945796
Am J Case Rep 2025; 26:e945796
Figure 3. (A) Small fragmented biopsy showing type B3 thymoma (H&E ×200); (B) large epithelioid cells (highlighted with P40 immunohistochemistry 200); (C) lymphocytic component with an immature T-cell phenotype CD3 ×200; (D) Factor1A ×200; (E) CD99 positive ×200; (F) High power view of uniform, large clear thymic epithelial cells (black arrow) and scattered small mature lymphocytes (red arrow) (H&E ×600).