Fig. 6. A 29-year-old male diagnosed with Gorham–Stout disease presented with dyspnea associated with massive chylous effusion.

A. Chest radiography reveals a deformed thoracic cage and spine with osteolytic changes in the left ribs. A large pleural effusion is noted on both sides. B. T2-weighted MR images shows high signal intensity in the left thoracic cage, reflecting the presence of abnormal lymphatic tissue in the ribs, intercostal muscles, and subpleural soft tissues. These findings are consistent with those of Gorham disease.