Which of the following incisions describes a Chevron incision?

The Chevron incision is characterized by its bilateral subcostal nature, shaped somewhat like a chevron or a "V." This type of incision is commonly used in surgical procedures that require access to the upper abdomen, particularly in operations involving the liver, bile ducts, or pancreas. The design of this incision allows for excellent exposure of the abdominal cavity while also facilitating better cosmetic outcomes compared to some other incisional approaches.

The bilateral subcostal aspect provides a wider exposure than a simple midline incision, which is crucial for certain complex surgeries. This incision also allows for the elevation of the rib cage, which can be advantageous in gaining access to the upper abdominal organs without excessive retraction that might compromise the surrounding structures.

In contrast, the other options describe different types of incisions that are not characteristic of a Chevron. A transverse incision is typically horizontal but does not have the distinctive "V" shape of a Chevron. A vertical midline incision would go straight down the middle of the abdomen, lacking the bilateral component. A small umbilical incision is too limited in size and location to classify as a Chevron. Thus, the unique features and surgical applications of a bilateral subcostal incision correctly identify it as a Chevron incision.