[CT diagnosis of myasthenia gravis].

This paper reported 21 cases of myasthenia gravis. All investigated by laboratory tests, conventional chest X-ray study and CT scan, and documented by surgery and pathology. There were 9 cases of thymoma, 2 thymic cyst, 8 normal thymus, 1 atrophic thymus and 1 thymic hyperplasia. In this series, the diagnostic accuracy rate of CT scan was over 90%. Of course, CT is a highly efficient technique for evaluation of abnormalities of thymus, but high resolution CT scanner and the ability of correct interpretation of CT image are even more important.