**Core Concept**
The Maltese Cross is a characteristic histopathological feature associated with a specific type of aneurysm. It represents a complex pattern of arterial wall thickening and calcification, often seen in the context of aortic aneurysms.

**Why the Correct Answer is Right**
The Maltese Cross is specifically seen in the setting of a dissecting aneurysm, where the intimal tear leads to blood tracking along the media and adventitia of the aorta. This results in a characteristic pattern of calcification and fibrosis, resembling a Maltese Cross. The calcification is due to the deposition of calcium in the medial layer of the aortic wall.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Maltese Cross is not a characteristic feature of atherosclerotic aneurysms, which typically show a more diffuse pattern of intimal thickening and lipid deposition.

**Option B:** This option is incorrect because the Maltese Cross is not a characteristic feature of mycotic aneurysms, which are typically caused by infection and show a more irregular and lobulated appearance.

**Option C:** This option is incorrect because the Maltese Cross is not a characteristic feature of traumatic aneurysms, which are typically caused by direct injury to the aorta and show a more localized and irregular appearance.

**Clinical Pearl / High-Yield Fact**
The Maltese Cross is a classic radiological feature of aortic dissection, and its presence should prompt urgent evaluation and management to prevent complications.

**Correct Answer:** D. Dissecting aneurysm