Abstract
The majority of NSCLC falls in adenocarcinoma and squamous cell carcinoma, with the remainder including adenosquamous carcinoma, large cell carcinoma, sarcomatoid carcinoma, and salivary gland-type carcinoma. The importance of subclassifying NSCLC in biopsy and cytology material has been discussed in another chapter. While characteristic morphological features are usually evident in well-differentiated adenocarcinoma and squamous cell carcinoma, poorly differentiated carcinoma often requires immunohistochemistry. A number of antibodies are available, but none is absolutely specific for a particular histotype; therefore, a panel of immunohistochemistry markers is recommended. Currently recognized as reliable markers are TTF-1 and napsin A for adenocarcinoma, and p63, p40, and CK5/6 for squamous cell carcinoma. It should also be noted that the lung is the most common location for metastasis, and it is important to keep this possibility in mind.
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Nonaka, D. (2015). Ancillary Immunohistochemical Techniques for the Subclassification of Non-small Cell Lung Cancer. In: Moreira, A., Saqi, A. (eds) Diagnosing Non-small Cell Carcinoma in Small Biopsy and Cytology. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-1607-8_5
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