A -year-old man comes to the clinic reporting progressive difficulty swallowing over the past four months. Initially, he noticed food feeling "stuck" in his lower chest when eating solid meals such as meat, but recently he has struggled to swallow liquids as well. He notes an unintentional weight loss of kg ( lbs) since his symptoms began. His medical history is notable for hypertension, hyperlipidemia, and a -pack-year smoking history. Vital signs are within normal limits. Physical examination reveals temporal wasting but is otherwise unremarkable. Laboratory studies show a hemoglobin of g/dL with a mean corpuscular volume of fL. Based on current clinical guidelines, arrange the following diagnostic and staging steps in the most appropriate chronological order.
- 1Esophagogastroduodenoscopy (EGD) with targeted mucosal biopsy
- 2Computed tomography (CT) scan of the chest and abdomen
- 3Endoscopic ultrasound (EUS) of the esophagus
- 4Initiation of stage-appropriate therapy (e.g., neoadjuvant chemoradiotherapy)