Malignant epithelial lung carcinoma can be subclassified by histology into several tumor
types, including adenocarcinoma and squamous cell carcinoma. The need for a uniform
method of classifying lung carcinomas is growing as clinical trials reveal treatment and side
effect differences associated with histological subtypes. Diagnosis is primarily performed by
morphological assessment. However, the increased use of needle biopsy has diminished
the amount of tissue available for interpretation. These changes in how lung carcinomas are …