Ciliated hepatic foregut cyst

Ciliated hepatic foregut cyst is a very rare type of hepatic cyst, with nonspecific radiological features. Less than a hundred of cases have been reported yet 1. They are usually benign, but rare cases of malignant degeneration (in squamous cell carcinoma) have also been reported 1-4

They are more often seen in adults, although a few reported cases have been described in children (about 10) 5.

Histologically, they are similar to bronchogenic cyst.

They are composed of four layers including: a ciliated pseudostratified columnar epithelium, a  smooth muscle layer, a subepithelial connective tissue layer and an external fibrous capsule 5.

They are usually solitary 2, non-enhancing, unilocular, smaller than 3 cm and subcapsular in location. They often involve the 4th segment of the liver.

They have a variable density, which range from hypodense (cystic) to isodense, to hyperdense (soft tissue density) on NECT 3.

Fluid-fluid levels are often seen, and the signal on MRI depends on the proteinaceous content.

  • T1: variable signal from hypo-, iso-, to hyperintense, depending on the content of the cyst
  • T2: predominantly hyperintense
  • T1 C+non enhancing 

Imaging differential considerations include:

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Article information

rID: 25922
Synonyms or Alternate Spellings:
  • Ciliated liver foregut cyst

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