A 49-year-old woman with an enlarging, palpable mass on her back.

A 42-year-old man with declining renal function undergoing renal transplant evaluation.

A 42-year-old man with worsening left lower quadrant abdominal pain over the past four days.

A 51-year-old woman with an incidental finding on CT scan of the abdomen and pelvis.

A 64-year-old woman with progressive left upper quadrant pain for the past several months.

A 4-year-old girl with hardness and swelling on the right side of her abdomen.

A 71-year-old man undergoing staging scans for chronic lymphocytic leukemia.

A 26-year-old man with several days of worsening abdominal pain.

A 46-year-old man presents with neck fullness and abdominal pain.

A 21-year-old man with left lower quadrant abdominal pain for the past two weeks.

A 58-year-old woman undergoing follow-up imaging of an incidental finding seen on cardiac CT.

A 60-year-old man with a history of gastric bypass one year ago presents with epigastric pain.

A 32-year-old man with fever, neutropenia, and intermittent sharp abdominal pain.

A 39-year-old woman involved in a high-speed motor vehicle collision.

A 30-year-old woman with nausea, vomiting, and abdominal discomfort.

A 60-year-old man presents with fever, leukocytosis, and acute renal failure. The patient has a history of bladder cancer and underwent cystectomy and the formation of a Studer pouch.

A 20-year-old woman with a history of skeletal abnormalities and new-onset arm pain.

An 89-year-old man with diffuse abdominal pain, nausea, and constipation.

A 55-year-old man presents with abdominal pain and symptoms of gastroesophageal reflux.

A 35-year-old woman with minimal and occasional bloody discharge from the umbilicus.