Adrenal gland – CA19-9 negative adrenocortical adenoma

Adrenal gland – CA19-9 negative pheochromocytoma

Anal canal – CA19-9 negative squamous cell carcinoma

Breast – CA19-9 negative invasive breast cancer of no special type (NST)

Breast – CA19-9 negative invasive lobular breast cancer

Breast – Invasive breast cancer of no special type (NST) with a moderate to strong CA19-9 positivity of a large subset of tumor cells

Colon – Colorectal adenocarcinoma showing a faint CA19-9 staining at apical membranes of some tumor cells

Colon – Colorectal adenocarcinoma with a weak to moderate CA19-9 staining of tumor cells, mainly at apical membranes

Colon – Colorectal adenocarcinoma with strong CA19-9 staining of tumor cells

Esophagus – CA19-9 negative squamous cell carcinoma

Esophagus – Adenocarcinoma with strong CA19-9 immunostaining of tumor cells. Stroma with “contamination artifact”

Kidney – CA19-9 negative clear cell carcinoma

Kidney – Papillary renal cell carcinoma with weak to moderate CA19-9 positivity of a subset of scattered tumor cells

Liver – CA19-9 negative hepatocellular carcinoma

Liver – Cholangiocellular carcinoma with strong CA19-9 staining of tumor cells

Lung – Adenocarcinoma with strong CA19-9 staining of most tumor cells

Lymph node – CA19-9 negative diffuse large B-cell lymphoma

Lymph node – CA19-9 negative Hodgkin's lymphoma

Lymph node – CA19-9 negative Hodgkin's lymphoma

Ovary – CA19-9 negative clear cell carcinoma

Ovary – CA19-9 negative serous high-grade carcinoma

Ovary – Clear cell carcinoma with strong CA19-9 staining of tumor cells

Ovary – Mucinous carcinoma with strong CA19-9 staining of all cancer cells

Pancreas – CA19-9 negative acinar cell carcinoma

Pancreas – Ductal adenocarcinoma with strong CA19-9 positivity of tumor cells

Pancreas – Ductal adenocarcinoma with strong CA19-9 staining of tumor cells

Pancreas – Neuroendocrine tumor with strong CA19-9 positivity of all tumor cells

Prostate – Adenocarcinoma (Gleason 4+4=8) with a moderate to strong CA19-9 positivity of all tumor cells

Prostate – CA19-9 negative adenocarcinoma (Gleason 3+3=6)

Prostate – CA19-9 negative adenocarcinoma (Gleason 5+5=10)

Salivary gland – Pleomorphic adenoma with strong CA19-9 staining of a small subset of tumor cells

Salivary gland – Warthin tumor with moderate to strong CA19-9 staining of a small subset of tumor cells

Salivary gland – Warthin tumor with strong CA19-9 staining of epithelial tumor cells

Stomach – CA19-9 negative gastrointestinal stromal tumor (GIST)

Stomach – Gastric adenocarcinoma (diffuse type) showing a distinct CA19-9 staining of tumor cells

Stomach – Gastric adenocarcinoma (intestinal type) with Intense CA19-9 staining of all tumor cells. The tumor stroma shows also staining due to a contamination artifact (diffusion of CA 19-9 protein from tumor cells to adjacent structures)

Testis – CA19-9 negative Leydig cell tumor

Testis – CA19-9 negative seminoma

Testis – Embryonal carcinoma with strong CA19-9 staining of tumor cells

Urinary bladder – CA19-9 negative muscle-invasive urothelial carcinoma

Urinary bladder – Muscle-invasive urothelial carcinoma (pT2-4) with strong CA19-9 positivity of tumor cells

Uterus, cervix – Adenocarcinoma with intense CA19-9 staining, predominantly seen at the apical pole of tumor cells

Uterus, cervix – Squamous cell carcinoma with strong CA19-9 staining of all tumor cells

Vagina – Squamous cell carcinoma with strong CA19-9 positivity of cancer cells