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Table 1.

The difference between preoperative and postoperative diagnosis.

Preoperative diagnosis Histopathological findings Final diagnosis
1. Osteochondral bone cyst Necrotic subchondral bone trabeculae Osteochondral bone cyst
2. Osteochondral bone cyst Necrotic bone with infilteration by plasma cells and scattered lymphocytes and polymorpholeucocytes Chronic infection in talus
3. Aneurysmal bone cyst Eroded bone with numerous multinoculated giant cell with inflammatory cells amidst pools of blood Aneurysmal bone cyst
4. Intraosseus ganglion Fibrous tissue with mucoid degeneration Intraosseus ganglion
5. Osteochondral bone cyst Necrotic subchondral bone trabeculae Osteochondral bone cyst
6. Aneurysmal bone cyst Eroded bone with numerous multinoculated giant cell with inflammatory cells amidst pools of blood Aneurysmal bone cyst
7. Osteochondral bone cyst Sclerotic bone surrounding vascular tissue with endothelium lining Angiomatous lesion of the talus
8. Intraosseus ganglion Fibrous tissue with mucoid degeneration Intraosseus ganglion

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