Figure 3.

Histopathological features of the parotid gland tumour. (A) On macroscopic examination, the tumour was relatively well-circumscribed and white to pale yellow in colour. (B) On histology, multiple cysts accompanying abundant lymphocytic infiltration and lymphoid follicle formation were revealed; (C) cysts were lined by intermediate cells and occasional mucinous cells (haematoxylin and eosin; magnification, x400). (D) Break-apart fluorescence in situ hybridization for MAML2 rearrangement indicates split signals (arrowheads indicate non-altered signals; magnification, x1,000). MAML2, mastermind-like transcriptional coactivator 2.