P40 Test for Lung Cancer - Immunohistochemistry: P40

A qualitative immunohistochemical (IHC) assay using a monoclonal antibody against the protein P40 (also known as ΔNp63), a short isoform of the p63 protein. It aims to detect nuclear expression of P40, a highly sensitive and specific marker for determining the squamous origin of cells, particularly in lung and head and neck cancers.