Which treatment is typically not used for neointimal hyperplasia?

• A. Cutting/scoring balloon
• B. Medication therapy
• C. Self-expanding stent
• D. Non-compliant balloon

Answer: (C)

The treatment that is typically not used for neointimal hyperplasia is the self-expanding stent. Neointimal hyperplasia refers to the excessive proliferation of smooth muscle cells and extracellular matrix in the arterial wall following vascular interventions, such as angioplasty or stenting.

Self-expanding stents, although effective for providing initial vessel support, can be problematic as they may promote neointimal hyperplasia due to their design and the biological response they provoke. The metallic surface of the stent can act as a scaffold for tissue growth, potentially leading to restenosis or narrowing of the vessel over time.

In contrast, cutting/scoring balloons are specifically designed to create controlled injuries in the vessel wall to help resist neointimal formation. Medication therapy, such as the use of drug-eluting stents or systemic medications, aims to prevent or reduce the rate of neointimal hyperplasia by releasing drugs that inhibit cellular proliferation. Non-compliant balloons can be used to optimize the expansion of stents without the spring-back effect that can encourage neointimal growth.

Hence, self-expanding stents are not a treatment to combat neointimal hyperplasia, making them the least suitable option among the choices provided.