• A traumatic or pathologic injury to the bones of the skull in which the continuity of the bones of the skull is broken.
  NCI
  U.S. National Cancer Institute, 2021
• (fractured skull) A partial or complete breakage of the skull.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• Fractures of the skull which may result from penetrating or nonpenetrating head injuries or rarely BONE DISEASES (see also FRACTURES, SPONTANEOUS). Skull fractures may be classified by location (e.g., SKULL FRACTURE, BASILAR), radiographic appearance (e.g., linear), or based upon cranial integrity (e.g., SKULL FRACTURE, DEPRESSED).
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• A skull fracture is a break in a bone surrounding the brain. Skull fractures can occur with or without brain damage.
  Merck Manuals
  Merck & Co., Inc., 2025
• The brain is surrounded by cerebrospinal fluid (CSF), enclosed in meningeal covering, and protected inside the skull. Furthermore, the fascia and muscles of the scalp provide additional cushioning to the brain.
  Medscape
  WebMD, 2025
• Skull fracture refers to a fracture of one or more bones of the cranial vault or skull base. They are categorized according to the appearance, location, degree of depression, and if they openly communicate with sinuses, mucous membranes, or skin. There may be linear fractures or there may be comminuted fractures, which are more complex...
  Epocrates
  Athenahealth, Inc., 2019