This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin, Subject name: Medicine
[{'content': 'A 69-year-old woman develops dark, velvety pigmentation in her axillae. She has noticed 10 lb weight loss over the past 3 months with heartburn and early satiety. She notices no other symptoms. Which of the following conditions should she be studied for? \nSelect and explain. \nA. a visceral carcinoma, B. lymphoma, C. diabetes mellitus, D. sarcoidosis', 'role': 'user'}, {'content': "Answer: A \nExplanation: (a) Source: (Wolff, p. 86)Patients with acanthosis nigricans should be studied for a visceral carcinoma. There are hereditary, drug-induced, and benign forms of acanthosis nigricans as well. Given this patient's symptoms a gastric malignancy should be ruled out. Diabetics get a benign form of the disorder. Other dermatoses associated with malignancy include dermatomyositis, flushing, acquired ichthyosis, and thrombophlebitis migrans.", 'role': 'assistant'}]