Senior Member (100+ posts) Joined: May 2006 Posts: 137 | Off the top of my head, 'unknown primaries' are somewhere around 5%, if I recall correctly.
dx 2/13/06. modified radical neck dissection 3/9/06 multiple biopsies of upper airway and direct laryngoscopy. 1 of 47 lymph nodes positive for metastatic undifferentiated carcinoma (lymphoepithelioma). Unknown primary. Finished radiation 5/24/06.
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