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Differences between real cysts and pseudocysts in metastatic lymph nodes
| Cavity | prevalence | Lumen content | CK7 Expression | Mechanism of formation |
|---|---|---|---|---|
| Pseudocysts | Majority of cases | keratin and cellular debris | Negative | Degradation of keratin and cellular debris/Sudden blockage of lymphatic fluid flow |
| True cysts | Few cases | eosinophilic fluid | Positive | Origination from transformed keratinocytes/ducts of submucosal salivary glands |
