Fig. 8: Cystic tumor necrosis.

A, B By MRI, these appeared as heterogeneous cystic lesions within the pancreatic ductal adenocarcinoma (A MRI, T1-weighted image, arterial phase, B HASTE-MRI). C In 2 cases, there was a cavitary lesion (asterisk) lined by hypercellular granulation tissue stroma (with inflammatory cells). D In 3 cases, the cyst wall showed partial hyalinization with trapped neoplastic glands (H&E stain).