Epithelial inclusion in axillary lymph node associated with a breast carcinoma: Report of a case with a review of the literature

Since epithelial inclusions in axillary lymph nodes are rare, some diagnost ic problems concerning their nature have arisen. We report a case of a cyst ic squamous epithelial inclusion in an axillary lymph node of a patient aff ected by a high grade breast carcinoma with focal squamous differentiation. Although the lesion was histologically benign, the possibility that it rep resents a well-differentiated squamous metastasis cannot be completely rule d out. To our knowledge, this is the first case of an epithelial lymph node inclusion associated with a breast carcinoma showing morphological evidenc e of squamous differentiation. Here, we discuss the diagnostic problems and give a review of the literature.