Figure 1.

Emperipolesis, RDD. FNA cervical lymph node. Emperipolesis in multinucleated giant cells (arrows) LP (a). Lymphocytes (arrow A) and plasma cells (arrow B) HP (b). Neutrophils and a few plasma cells (c) HP. Lymphocytes, neutophils, plasma cells and associated macrophages (d), HP. Lymphocytes and nuclear debris (e) high power. Nasal biopsy with S-100 positive cells, insert cytospin specimen with S-100 positive multinucleated giant cells. a–c) Diff Quik®; d-e) Papanicolaou stain; f) immunoperoxidase stain with DAB