Table 1.

Cytological findings, immunostaining results (p16), and HPV genotypes of the three carcinomas

	PDASC (GCC)	UTAC	CIS
Cytological findings	Solid clusters Fine-to-coarse granular cytoplasm Prominent nucleoli	Papillary or tubular structures	Not recognized
Immunostaining results (p16)	+  +	+  +	+  +
HPV genotypes	HPV-18	HPV-18	HPV-18

PDASC (GCC): poorly differentiated adenosquamous carcinoma (glassy cell carcinoma), UTAC: usual type adenocarcinoma, CIS: squamous cell carcinoma in situ

 +  + : diffusely positive, + : focally positive, − : negative

HPV: human papillomavirus