Which type of skull fracture is least likely to show visible deformity?

A linear skull fracture is characterized by a simple crack in the skull, typically occurring in a straight line without displacement of the bone. This type of fracture often does not cause any visible deformity on the surface of the skull because the bone is merely cracked rather than displaced or broken into multiple pieces.

The lack of visible deformity is significant because it can make linear fractures more challenging to diagnose solely based on physical examination. They may not present with the obvious swelling or sunken areas that might be associated with other types of fractures.

In contrast, basilar fractures involve the base of the skull and can present with various symptoms such as bruising around the eyes or behind the ears, which indicate significant structural impact suggesting visible deformities may be present. Open fractures, by their nature, break through the skin and are often associated with noticeable deformities and protrusion of bone or tissue. Compressed fractures typically result in a portion of the skull being pushed inward, which leads to evident deformation.

Due to these characteristics, a linear skull fracture is least likely to show visible deformity while still posing serious risks and requiring thorough evaluation and management.