# The use of immunohistochemistry for diagnosis ## The use of immunohistochemistry for diagnosis ## The use of immunohistochemistry for diagnosis ## Immunohistochemistry, carcinomas of unknown primary, and incidence rates ## Comparison of thyroid transcription factor-1 expression by 2 monoclonal antibodies in pulmonary and nonpulmonary primary tumors. ## The use of immunohistochemistry for diagnosis --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.parapathology.com/stains/the-use-of-immunohistochemistry-for-diagnosis.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.