A 52-year-old Indian man presents with a 3-month history of progressive dysphagia and chest pain. Upper endoscopy reveals a 4 cm ulcerated lesion in the mid-esophagus. Biopsy confirms poorly differentiated squamous cell carcinoma. CT chest shows invasion into the muscularis propria but no involvement of adjacent structures. There is no evidence of distant metastases. Endoscopic ultrasound confirms T2 disease with 2 regional lymph nodes involved. What is the TNM stage of this tumor?