How likely are atypical cells found in a lymph node biopsy cancerous?

Questionable: When lymph nodes are examined it is to see if the are involved in an inflammatory process or have a primary or metastatic malignancy ongoing. Touch preps may help to define the presence of abnormal cells but if they do, immunohistochemistry is performed with a battery of monoclonals to see if a specific malignancy is present. At times normal skin and glandular elements are found in nodes