Clinical Presentation

A 70-year-old man presents with abdominal pain.

Further Work-up

(A) Abdominal radiograph shows a curvilinear calcification (arrow) projected over the left upper quadrant of the abdomen. (B) Infused abdominal computed tomography (CT) shows a round cystic lesion (arrow) with a calcified rim.

Differential Diagnosis

• Simple splenic cyst: This is the most likely diagnosis for the CT finding of a fluid-density, nonenhancing, round structure in the spleen. The differential diagnosis for the curvilinear calcification seen on the radiograph is discussed in “Pearls & Pitfalls.”

• Epidermoid cyst: This may have identical features, although it calcifies less commonly.

• Echinococcal cyst: