Abstract
1. Seven cases of sacral extradural cyst are reported.
2. The etiology and clinical features are discussed and the literature reviewed.
3. The differential diagnosis is discussed; certain features, useful in making the diagnosis of sacral extradural cysts, are recorded.
4. When a cyst causes symptoms excision brings relief. Because some cysts are symptomless, it is important to exclude an accompanying prolapsed intervertebral disc.
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