CT Chest reveаled 2cm nоdule in the RUL c/w brоnchоgenic mаlignаncy, right subcarinal lymph nodes suspicious for involvement. PET scan showed 2.2cm mass with extension into the chest wall. Lobectomy was performed revealing 4cm squamous cell carcinoma in the right upper lobe, parietal pleura involved, pericardial effusion positive for carcinoma, 2 subcarinal nodes neg for malignancy. What is the pathological stage group?