Segmental Arterial Mediolysis: A Multiguised Vasospastic Arteriopathy with Collateral Mesangial Cell Hyperplasia and Cardiac Toxicity Generated by Norepinephrine and Hyperdense Adrenoceptors Alone or by Crosstalk with Other Pressor Agents

Figure 22

Segmental arterial mediolysis reparative phase. The black arrow points to a gap aneurysm containing a recent thrombus, and the blue arrow to a dissection beginning at the interface of the gap and the arterial wall and developing between the outer media and the fibrin-coated adventitia. Movat stain ×50 (adapted with permission from Modern Pathology 18(3), copyright 1995, Nature Publishing Group).