Objective To study and analyze the MRI manifestation of miliary tuberculosis of the brain.Methods Twenty-two cases with cerebral miliary tuberculosis of the brain were retrospectively studied with MRI including plain scan and enhanced study with GD-DTPA MRI features regarding the size,shape and distribution of the lesions were summarized and analyzed.Results Miliary tuberculosis of the brain was found most frequently at the junctional area of white and gray matter.The diameter of the lesion was less than 3 mm,therefore,plain scan often failed to display the lesions,however,markedly enhanced tubercles could be demonstrated on enhanced scan.Conclusion Enhanced MRI scan proved to be very helpful in the early detection of miliary tuberculosis of the brain.