Immunostaining pattern of PIG-U, PIG-T, GPAA1, GPI8 and PIG-S proteins among different types of lung carcinoma vs normal tissues. Absence or weak expression of PIG-U, PIG-T, GPAA1, GPI8 and PIG-S was observed in normal lung tissue and SCLC as compared to moderate to high expression in various forms of NSCLC such as squamous cell carcinoma, adenocarcinoma and large cell carcinoma. Magnification × 100.