Immunohistochemistry of Metastatic Tumors from an Unknown Primary

Pathologists frequently encounter a biopsy of a metastatic tumor in a patient who has no known primary tumor. A Pathologist now becomes a "Sherlock Holmes" using a battery of tools, most important of which is immunohistochemistry. You have an important role in the life of this patient. Learn the information and your role in the histology lab to help.