Definition
A conventional thymoma with an exuberant collagen-rich stroma. This phenomenon has been observed with B2 and B3 thymomas0.
This tumour is extremely rare.
The stroma contains scant bland fibroblasts.
0 Tumours of the Lung, Pleura, Thymus and Heart. WHO Classification of Tumours. IARC Press 2004.
©SMUHT/PW Bishop