Fig. 2
From: A case of peritoneal metastasis during treatment for hypopharyngeal squamous cell carcinoma
Cytological microscopic imaging of peritoneal fluid (cell blocks). a Hematoxylin-eosin stain showed isolated atypical cells with nucleoli distinct within the nucleus (arrowhead). b Immunohistochemistry for p40, a highly specific squamous cell carcinoma marker, was positive in the nucleus. c Immunohistochemistry for CK5/6, epithelial markers, was positive in the cytoplasm. H.E. hematoxylin-eosin