Which of the following describes a true aneurysm?

A true aneurysm is characterized by a wide neck with tapering edges. This structural definition indicates that the aneurysm involves all three layers of the arterial wall (intima, media, and adventitia), and typically has a gradual expansion from the point of origin, which is represented by the tapering edges. This shape contrasts with other forms of vascular dilations or abnormalities, where abrupt edges or narrow necks may signify different pathological conditions.

Understanding the characteristics of true aneurysms helps in differentiating them from false aneurysms and other vascular anomalies, which may present with different neck shapes or edge configurations. Recognizing these features is crucial for accurate diagnosis and appropriate management in clinical practice.