Gutter fracture result from :
**Core Concept**
A gutter fracture, also known as a crescentic fracture, is a type of fracture that occurs in the skull, particularly in the temporal bone. It is characterized by a crescent-shaped fracture line that follows the inner table of the skull, often resulting from a tangential gunshot wound or a severe impact to the head.
**Why the Correct Answer is Right**
A gutter fracture occurs due to the transmission of force along the inner table of the skull, which creates a crescent-shaped fracture line. This type of fracture is often associated with tangential gunshot wounds or severe blunt trauma to the head. The inner table of the skull is more susceptible to fracture due to its thinness and the fact that it is in direct contact with the dura mater, a tough membrane that surrounds the brain.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a depressed fracture would result from a more central impact, causing the bone to be pushed inward.
**Option B:** This option is incorrect because a linear fracture would result from a more direct impact, causing a straight line fracture in the bone.
**Option C:** This option is incorrect because a comminuted fracture would result from a more severe impact, causing multiple fragments of bone to break off.
**Clinical Pearl / High-Yield Fact**
Gutter fractures are often associated with tangential gunshot wounds or severe blunt trauma to the head, and can be a sign of a more severe underlying injury.
**Correct Answer:** D.