1980 年 28 巻 4 号 p. 604-607
The leggs of 166 students who belong to various sports-clubs were examined radiologically. Among the legs examined both tibia of one of the students showed a hard thickened prominence of the posterior cortex at the junction of the middle and lowermost thirds. The student had mentioned that he had felt pain in both the front and the lower part of both legs while he had been running during a period of three months about one and half years ago. It was suspected that his condition was the result of the healing of a particular type of stress fracture of the tibia in athletes involving only posterior corticalis of the bone but this condition was not checked by a doctor at that time. Hypertrophic change of the lateral corticalis of the tibia was found in about 80% of the cases. The cause-effect relationship between sports and this change was discussed.