Catastrophic head injuries in high school and college football players.

Background: Catastrophic head injuries in football are rare but tragic events.

Purpose: To update the profile of catastrophic head injuries in high school and college football players and to describe relevant risk factors.

Study Design: Case series; Level of evidence, 4.

Catastrophic cervical spine injuries in high school and college football players.

Background: Catastrophic cervical spine injuries in football are rare but tragic events.

Purpose: To update the incidence of catastrophic cervical injuries in scholastic football players and identify new injury patterns.

Study Design: Descriptive epidemiology study.

Catastrophic injuries in high school and college baseball players.

Background: There are few epidemiologic studies of catastrophic baseball injuries.

Purpose: To develop a profile of catastrophic injuries in baseball players and to describe relevant risk factors.

Study Design: Retrospective cohort study.

Catastrophic cheerleading injuries.

Background: There are few epidemiologic studies of cheerleading injuries.

Purpose: To develop a profile of catastrophic injuries in cheerleading and to describe relevant risk factors.

Study Design: Retrospective cohort study.