Adrenal gland - Pheochromocytoma with strong diffuse chromogranin A immunostaining.
Adrenal gland - All tumor cells show a strong chromogranin A immunostaining in a pheochromocytoma.
Kidney - Chromophobe carcinoma with interspersed chromogranin A positive tumor cells.
Kidney - Oncocytoma showing strong chromogranin A positivity in all tumor cells.
Lung - Chromogranin A negative adenocarcinoma.
Lung - Small cell carcinoma with weak to moderate chromogranin A immunostaining in a fraction of cells.
Ovary - Serous high-grade carcinoma showing a weak cytoplasmic chromogranin A positivity in the majority of tumor cells and few interspersed strongly positive cells.
Pancreas - Neuroendocrine tumor displaying a strong chromogranin A positivity of all tumor cells.
Prostate - Chromogranin A negative adenocarcinoma (Gleason 4+4=8).
Skin - Basal cell carcinoma with a moderate intensity chromogranin A immunostaining in the basal cell layer.
Skin - Merkel cell carcinoma showing strong diffuse chromogranin A immunostaining.
Stomach - Adenocarcinoma (intestinal type) showing interspersed chromogranin A positive cells.
Thyroid - Medullary carcinoma with intense chromogranin A immunostaining.
Urinary bladder - Small cell carcinoma with intense chromogranin A positivity.