The fractures of distal forearm are the most common trauma in children. Sometimes one of the bones becomes shortened as a result of fracture fragments overlap. When some amount of shortening exists, concern regarding relationship of distal radio-ulnar joint (DRUJ) arises. The common opinion is expressed in one of the textbooks and is represented by one sentence, which usually one bone shortening is well tolerated, probably does not cause a problem, and does not have clinical significance. However, pathology of ulna plus or minus variants is well described and may cause ulno-carpal abutting syndrome or radiocarpal pain. This concern may lead to more aggressive approach in treatment of a fracture, with attempts to make an equal bone length. We did not find in the literature study that investigates this problem. We postulate that obvious shortening of one bone may cause an inequality of DRUJ and can be clinically significant.