Undifferentiated carcinoma 
      This tumor is malignant in its  clinical appearance already: a firm lesion, usually with facial nerve paralysis. The aspirate contains large, highly atypical cells with large,  atypical nuclei. They may appear in groups and as single cells as well.
      
        
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          Undifferentiated carcinoma  - histology   | 
        
      
      
        
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          Undifferentiated carcinoma  - cytology   |