Figure 20:
Cervical squamous carcinoma can be seen as three dimensional groups or single cells in peritoneal washings. This group of nonkeratinizing squamous carcinoma cells shows enlarged nuclei and increased nuclear-cytoplasmic ratio (arrow). Unless the histologic type is known, it is possible to overlook non-keratinizing squamous carcinoma as reactive mesothelial cells. (Modified PAP stain, 60X.)