Q. A 35-year-old male comes to the clinic complaining of a recent onset of headaches, fatigue, and excessive sweating. He also reports his ring size has increased and has recently noticed his shoes no longer fit. Vital signs are within normal limits. On physical examination, there is a noticeable increase in the size of the hands and feet, with thickening of the skin on his palms and soles. A mass is noted in the suprasellar region. What is the most likely diagnosis?