esophageal neoplasm; esophageal neoplasms, benign and malignant; esophageal tumor; esophageal tumors; esophageal tumour; esophageal tumours; esophagus neoplasm; esophagus neoplasm (disease); esophagus tumor; neoplasm of the esophagus; neoplasm of the oesophagus; oesophagus neoplasm; oesophagus neoplasm (disease); oesophagus tumour; tumor of esophagus; tumor of the esophagus; tumour of oesophagus; tumour of the oesophagus