抄録
We report a case of chondrosarcoma followed up on the X-ray for 17 years.
The patient is a 32-year-old man, who has the pain and mass of the left leg. Seventeen years ago, he complained of pain for the first time and was followed by a hospital under the disgnosis of the osteochondroma. After that, the pain and mass increased gradually and he consulted our hospital on March 1998. After the biopsy, that showed chondrosarcoma, the above knee amputation was done.
We could observe the X-ray from 1981 to 1998 retrospectively, and guessed the osteochondroma, periosteal chondroma or chondromyxoid fibroma changed to chondrosarcoma.
We consider it is important to follow them carefully because chondrosarcoma arise uncommonly in benign tumors, even if they were diagnosed as the benign tumor at the first.
