This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'A case of carcinoma breast stage-IV TNM. Which of the factors is not included in staging? \nSelect and explain. \nA. Satellite nodules, B. Inflammation, C. Nipple retraction, D. Skin ulceration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In Stage IV TNM of carcinoma of breast, malignancy has spread to chest wall, there is evidence of inflammation, satellite lesions and ulcerations.', 'role': 'assistant'}]