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AJR 2002; 178:475-480
© American Roentgen Ray Society

Radiologic Features of All-Trans-Retinoic Acid Syndrome

Jung Im Jung1, Jung Eun Choi1, Seong Tai Hahn1, Chang Ki Min2, Chun Choo Kim2 and Seog Hee Park1

1 Department of Radiology, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 62 Yeouidodong, Youngdungpo—gu, Seoul 150-713, South Korea.
2 Division of Hematology, Department of Internal Medicine, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.

OBJECTIVE. The treatment of acute promyelocytic leukemia with all-trans-retinoic acid (ATRA) sometimes results in a syndrome characterized by fever, respiratory distress, weight gain, pleural and pericardial effusion, and pulmonary infiltrates. We report the radiologic features of ATRA syndrome.

MATERIALS AND METHODS. During the past 5 years, 69 patients with acute promyelocytic leukemia were treated with ATRA. Of this group, 15 patients developed ATRA syndrome. Serial chest radiographs of the 15 patients with ATRA syndrome were evaluated retrospectively for the presence of pleural effusion, pulmonary nodules, consolidation, ground-glass opacity, septal lines, increased pulmonary blood volume, peribronchial cuffing, and air bronchogram. Also, we measured the cardiothoracic ratio and the vascular pedicle width.

RESULTS. Chest radiographs showed increased cardiothoracic ratio in 13 of the 15 patients, increased vascular pedicle width in 13, increased pulmonary blood volume in 13, septal lines in nine, peribronchial cuffing in nine, ground-glass opacity in nine, consolidation in seven, and nodules in seven. Pleural effusion was noted in 11 of the 15 patients, and air bronchogram was noted in five of the 15 patients. Pulmonary hemorrhage developed in three patients who were being treated with ATRA; they showed bilateral, diffuse, poorly defined nodules and ground-glass opacity on radiography.

CONCLUSION. Most patients with ATRA syndrome have abnormal findings on chest radiographs, and the abnormalities are similar to those of pulmonary edema.


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