Breast cancer - Strong diffuse CK18 positivity in a breast cancer NST.
Cervical cancer - Adenocarcinoma of the cervix uteri with intense CK18 positivity.
Colorectal cancer - Adenocarcinoma of the colon with strong CK18 immunostaining.
Head and neck cancer - CK 18 negative squamous cell carcinoma of the larynx. Normal glandular cells serve as a positive staining control.
Kidney cancer - Strong CK18 immunostaining in chromophobe renal cell carcinoma.
Ovarian cancer - Strong CK18 immunostaining in a high grade serous carcinoma of the ovary.
Sarcoma - Weak to moderate CK18 neo-expression in a sarcoma NOS.
Stomach cancer - strong diffuse CK18 expression in an intestinal type stomach adenocarcinoma.
Testicular cancer - Yolk sac carcinoma with strong CK18 immunostaining.
Urinary bladder cancer - Strong diffuse CK18 expression in a muscle-invasive urothelial carcinoma.
Urinary bladder cancer - Strong diffuse CK18 immunostaining in a (micropapillary) urothelial carcinoma.
Vaginal cancer - Absence of CK18 immunostaining in a squamous cell carcinoma of the vagina.