<unk>  shares all the risk factors of a concussion; that is, those who are at increased risk for a concussion are also at higher risk for SIS. Thus, people who participate in sports such as boxing, Association football, American football, baseball, rugby, basketball, ice hockey, pro wrestling, horse riding, and skiing (especially Alpine) are at increased risk. The condition most commonly occurs in American football.<unk>  disproportionately affects teenagers. All documented cases occurred in people younger than 20 except in boxing. As of 2000, the<unk>  had never been reported in the medical literature in children younger than adolescent age. Young athletes have been found to be both more susceptible to concussions and more likely to get<unk>  than their older counterparts. However, SIS is also a concern for adult athletes. Adolescent and young adult males who play American football or hockey, or who box or ski are the most common sufferers of the condition. Most documented cases of SIS have occurred in males, but it is not known whether this is due to a special vulnerability or to a greater exposure of males to<unk><unk> s. In Canada, a law mandating concussion education for coaches, athletes, and medical practitioners was passed as a result of the death of Rowan Stringer, a female high school athlete who died after receiving three blows to the head in the course of one week in 2013. She showed only mild symptoms of headache following the first two<unk> s, but lost consciousness and never regained it following the third. Medical examiners found that SIS was the cause of her death. Studies have found that people who have received one concussion are at a higher risk to receive a concussion in the future.
Second-impact syndrome
Post-intensive care syndrome
Sandifer syndrome
Tumor lysis syndrome
Overlap syndrome
Majeed syndrome
Compartment syndrome
Edwards syndrome