A well documented case of a spontaneously curing anaplastic carcinoma in lymph node is presented with a 16 year follow up. Reevaluation and detailed immunohistochemical examination confirmed the original diagnosis of anaplastic carcinoma. This is the first report of a spontaneously curing anaplastic carcinoma which raises the following questions: Was the tumor in the axillary lymph node a metastasis or a primary tumor? Does the anaplastic carcinoma demonstrate the same spontaneous regression characteristics as for example the neuroblastoma?
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