Purpose : To investigate the correlation between mammographic findings of infiltrating ductal carcinoma (IDC), patient age and pathologic grading Materials and Methods : The study included 103 cases of infiltrating ductalcarcinoma in 102 women who during the preceding three years had undergone mammography and surgery. The mammogramswere retrospectively reviewed by two radiologists. The mean age of the patients was 45.2 (range 26-74) years andthe age distribution was seven in the 3rd decade, 37 in the 4th, 29 in the 5th, 24 in the 6th, and six in the 7thor above. Thirty-three lesions were histologic. Grade I, 59 were Grade II and 11 were Grade III. Results : Ten(9.7%) of 103 cases, all of whom were younger than 50, were missed during mammographic diagnosis. On mammograms, primary findings of breast malignancy were found in 54 (74%) of 73 patients younger than 50 and 27 (90%) of 30patients older than 51. Mass with or without microcalcification was found in 45 patients (62%) younger than 50 andin 26 (87%) older than 51. Nine (12%) and 3 (10%) in each age group showed secondary findings. There was nocorrelation between age distribution and histologic grading. Seventy-three percent of Grade I lesions and 78% ofthose of Grade III showed primary findings. Five lesions in each of Grade I and II were missed at mammographicinterpretation, but this was not statistically significant (p=0.250). In all 11 Grade III cases, breast cancerwere manifested as primary findings but this was not statistically significant (p=0.203). Conclusions : Themajority of IDC were detected by mammography, but 9.7% of IDC patients, all younger than 50, were misdiagnosed.Most IDC was manifested as primary findings, particularly in patients aged over 51. There were no differences inpathlogic grading according to age distribution. All histologic Grade III lesions were detected by mammography.to investigate and predict theprognosis of mycoplasma pneumonia according to radiographic pattern. Material and Method : We retrospectivelyreviewed plain chest radiographs of 230 patients in whom mycoplasm pneumonia had been serologically confirmed.Their age ranged from two months to 14 years and two months, and 203(88.3%) were younger than eight years.Radiographic patterns were classified as air space consolidation, bronchopneumonic, interstitial pneumonic ordiffuse mixed infiltrating type. The radiologic resolution period for each type was analysed by the resolution ofsymptoms and normalization of radiologic findings. Results ; The bronchopneumonic type, which was the most common, was seen in 82 patients(35.6%), airspace consolidation in 58(25.2%), interstitial in 55(23.9%), and diffuse mixedin 22(9.57%). In thirteen patients (5.7%), chest radiographs were normal, though the clinical and radiologicresolution period for each type was variable. The mean resolution period of the air space consolidation type was14.5 days, bronchopneumonic, 7.6 days ; interstitial, 10.5 days, and diffuse mixed, 15.6 days. The airspaceconsolidation type needed the longest recovery period, exceeded only by the diffuse mixed type. Conclusion : Thebronchopneumonic type was the most common radiographic pattern of mycoplasma pneumonia. The prognosis of theairspace consolidation type seems to be poorest, since this required the longest recovery period.