Relating to the diaphysis, which is the shaft or main body of a long bone, as opposed to the ends.
From Greek dia- (through) + physis (nature, growth), literally describing the main growing part of the bone, with the adjective suffix -eal, used in anatomical terminology.
When you're young, the diaphysis (bone shaft) and epiphysis (bone ends) are separated by cartilage that eventually ossifies—if you break a growth plate in your diaphyseal region, it could affect how long that bone grows, which is why pediatric fractures require careful treatment.
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