In the DeBakey classification of aortic dissection, which type is defined as a dissection confined entirely to the ascending aorta?

• A Type II ✓
• B Type I
• C Type IIIA
• D Type IIIB

Explanation

DeBakey type II dissection begins and ends within the ascending aorta, whereas type I extends from the ascending aorta into the descending aorta and beyond, and type III arises distal to the left subclavian artery with IIIA limited to the descending thoracic aorta and IIIB extending below the diaphragm. This distinction matters clinically because ascending dissections carry high mortality and are managed surgically.

Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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