<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 40-year-old man comes to the physician because of weight gain over the past 3 months. During this period, he has gained 10 kg 22 lb unintentionally. He also reports decreased sexual desire, oily skin, and sleeping difficulties. There is no personal or family history of serious illness. He has smoked one pack of cigarettes daily for the past 10 years. The patient appears lethargic. His temperature is 37C 98.6F, pulse is 80min, and blood pressure is 15090 mm Hg. Physical examination shows central obesity, acne, and thin, easily bruisable skin with stretch marks on the abdomen. There is darkening of the mucous membranes and the skin creases. Examination of the muscles shows atrophy and weakness of proximal muscle groups. His serum glucose concentration is 240 mgdL. Which of the following findings would most likely be present on imaging?? A: Pituitary microadenoma, B: Decreased thyroid size, C: Multiple kidney cysts, D: Adrenal carcinoma, E: Kidney tumor,  <response>: This is a clinical vignette describing a 40-year-old man with unintentional weight gain, decreased libido, oily skin, sleeping difficulties, lethargy, hypertension, central obesity, easy bruisability, muscle weakness and hyperglycemia. The key findings are central obesity, easy bruisability, muscle weakness, hyperglycemia and hypertension, which are classic signs and symptoms of Cushings syndrome. Cushings syndrome is most commonly caused by exogenous glucocorticoid use or a pituitary adenoma Cushings disease that leads to excess cortisol production. Imaging would likely show a pituitary adenoma in Cushings disease. The other findings described do not fit with the clinical presentation.A: Pituitary microadenoma 