1. Thymic Hyperplasia Presenting as Anterior Mediastinal Mass in 2 Patients With Graves Disease 
Adriane I. Budavari, MD, Michael D. Whitaker, MD, FRCPC, Richard A. Helmers, MD 
Mayo Clinic Proceedings 
Volume 77, Issue 5, Pages (May 2002)
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2. Figure 1
Posteroanterior chest radiograph showing the anterior mediastinal mass in case 1.
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3. Figure 2
Contrast computed tomography, axial cut, showing a large anterior mediastinal mass suggestive of thymic hyperplasia in case 1. Size of the mass at presentation (left) was 7 × 3 cm, and its size was markedly reduced 3 months later (right) after treatment with radioactive iodine I 131.
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4. Figure 3
Noncontrast computed tomography, axial cut, showing an anterior mediastinal mass suggestive of thymic hyperplasia in case 2. Mass at presentation (left) and markedly reduced 6 months after the initiation of propylthiouracil (right).
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